Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption

Slavney, Adam H.; Leppert, Linn; Bartesaghi, Davide; Gold-Parker, Aryeh; Toney, Michael F.; Savenije, Tom J.; Neaton, Jeffrey B.; Karunadasa, Hemamala I.

doi:10.1021/jacs.7b01629

Title: Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption

Abstract

Halide double perovskites have recently been developed as less toxic analogs of the lead perovskite solar-cell absorbers APbX3(A = monovalent cation; X = Br or I). However, all known halide double perovskites have large bandgaps that afford weak visible-light absorption. The first halide double perovskite evaluated as an absorber, Cs2AgBiBr6(1), has a bandgap of 1.95 eV. Here, we show that dilute alloying decreases 1's bandgap by ca. 0.5 eV. Importantly, time-resolved photoconductivity measurements reveal long-lived carriers with microsecond lifetimes in the alloyed material, which is very promising for photovoltaic applications. The alloyed perovskite described herein is the first double perovskite to show comparable bandgap energy and carrier lifetime to those of (CH3NH3)PbI3. By describing how energy- and symmetry-matched impurity orbitals, at low concentrations, dramatically alter 1's band edges, we open a potential pathway for the large and diverse family of halide double perovskites to compete with APbX3absorbers.

Authors:

Slavney, Adam H. ^[1]; Leppert, Linn ^[2]; Bartesaghi, Davide ^[3]; Gold-Parker, Aryeh ^[4];

^[5]; Savenije, Tom J. ^[6]; Neaton, Jeffrey B. ^[7];

^[1]

Stanford Univ., Stanford, CA (United States). Dept. of Chemistry
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Univ. of California, Berkeley, CA (United States). Dept. of Physics
Delft Univ. of Technology, Delft (The Netherlands). Dept. of Chemical Engineering and Optoelectronic Materials Section; Materials Innovation Institute (M2i), Delft (The Netherlands)
Stanford Univ., Stanford, CA (United States). Dept. of Chemistry; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Delft Univ. of Technology, Delft (The Netherlands). Dept. of Chemical Engineering and Optoelectronic Materials Section
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Univ. of California, Berkeley, CA (United States). Dept. of Physics; Kavli Energy NanoScience, Berkeley, CA (United States)

Publication Date:: Wed Mar 29 00:00:00 EDT 2017

Research Org.:: SLAC National Accelerator Lab. (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Sloan Foundation; Alexander von Humboldt Foundation; Netherlands Organization for Scientific Research (NWO); National Science Foundation (NSF)

OSTI Identifier:: 1360903

Alternate Identifier(s):: OSTI ID: 1458491

Grant/Contract Number:: AC02-76SF00515; AC02-05CH11231; DGE-1147470; F71.4.15562a

Resource Type:: Accepted Manuscript

Journal Name:: Journal of the American Chemical Society

Additional Journal Information:: Journal Volume: 139; Journal Issue: 14; Journal ID: ISSN 0002-7863

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Slavney, Adam H., Leppert, Linn, Bartesaghi, Davide, Gold-Parker, Aryeh, Toney, Michael F., Savenije, Tom J., Neaton, Jeffrey B., and Karunadasa, Hemamala I. Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption.  United States: N. p., 2017. 
Web.  doi:10.1021/jacs.7b01629.

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                    Slavney, Adam H., Leppert, Linn, Bartesaghi, Davide, Gold-Parker, Aryeh, Toney, Michael F., Savenije, Tom J., Neaton, Jeffrey B., & Karunadasa, Hemamala I. Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption.  United States.  https://doi.org/10.1021/jacs.7b01629

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                    Slavney, Adam H., Leppert, Linn, Bartesaghi, Davide, Gold-Parker, Aryeh, Toney, Michael F., Savenije, Tom J., Neaton, Jeffrey B., and Karunadasa, Hemamala I. Wed .  
"Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption".  United States.  https://doi.org/10.1021/jacs.7b01629.  https://www.osti.gov/servlets/purl/1360903.

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@article{osti_1360903,

  title        = {Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption},

  author       = {Slavney, Adam H. and Leppert, Linn and Bartesaghi, Davide and Gold-Parker, Aryeh and Toney, Michael F. and Savenije, Tom J. and Neaton, Jeffrey B. and Karunadasa, Hemamala I.},

  abstractNote = {Halide double perovskites have recently been developed as less toxic analogs of the lead perovskite solar-cell absorbers APbX3(A = monovalent cation; X = Br or I). However, all known halide double perovskites have large bandgaps that afford weak visible-light absorption. The first halide double perovskite evaluated as an absorber, Cs2AgBiBr6(1), has a bandgap of 1.95 eV. Here, we show that dilute alloying decreases 1's bandgap by ca. 0.5 eV. Importantly, time-resolved photoconductivity measurements reveal long-lived carriers with microsecond lifetimes in the alloyed material, which is very promising for photovoltaic applications. The alloyed perovskite described herein is the first double perovskite to show comparable bandgap energy and carrier lifetime to those of (CH3NH3)PbI3. By describing how energy- and symmetry-matched impurity orbitals, at low concentrations, dramatically alter 1's band edges, we open a potential pathway for the large and diverse family of halide double perovskites to compete with APbX3absorbers.},

  doi          = {10.1021/jacs.7b01629},

  journal      = {Journal of the American Chemical Society},

  number       = 14,

  volume       = 139,

  place        = {United States},

  year         = {Wed Mar 29 00:00:00 EDT 2017},

  month        = {Wed Mar 29 00:00:00 EDT 2017}

}

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We control surface recombination in the mixed-cation, mixed-halide perovskite, FA0.83Cs0.17Pb(I0.85Br0.15)3 by passivating non-radiative defects with the polymerizable Lewis base (3-aminopropyl)trimethoxysilane (APTMS). We demonstrate average minority carrier lifetimes > 4 μs, nearly single exponential monomolecular PL decays, and high external photoluminescence quantum efficiencies (>20%, corresponding to ~97% of the maximum theoretical quasi-Fermi-level splitting) at low excitation fluence. We confirm both the composition and valence band edge position of the FA0.83Cs0.17Pb(I0.85Br0.15)3 perovskite using multi-institution, cross-validated, XPS and UPS measurements. We extend the APTMS surface passivation to higher bandgap double cation (FA,Cs) compositions (1.7 eV, 1.75 eV and 1.8 eV) as well asmore »« less
https://doi.org/10.1021/acs.chemmater.1c00848

Full Text Available
A pencil-and-paper method for elucidating halide double perovskite band structures

Journal Article Slavney, Adam H. ; Connor, Bridget A. ; Leppert, Linn ; ... - Chemical Science

Halide double perovskites are an important emerging alternative to lead-halide perovskites in a variety of optoelectronic applications. Compared to ABX₃ single perovskites (A = monovalent cation, X = halide), A₂BB'X₆ double perovskites exhibit a wider array of compositions and electronic structures, promising finer control over physical and electronic properties through synthetic design. Yet, a clear understanding of how chemical composition dictates the electronic structures of this large family of materials is still lacking. In this work, we develop a qualitative Linear Combination of Atomic Orbitals (LCAO) model that describes the full range of band structures for double perovskites. Our simplemore »« less
Cited by 21
https://doi.org/10.1039/C9SC03219C
Reducing Surface Recombination Velocity of Methylammonium-Free Mixed-Cation Mixed-Halide Perovskites via Surface Passivation

Journal Article Jariwala, Sarthak ; Burke, Sven ; Dunfield, Sean ; ... - Chemistry of Materials

We control surface recombination in the mixed-cation, mixed-halide perovskite, FA0.83Cs0.17Pb(I0.85Br0.15)3, by passivating nonradiative defects with the polymerizable Lewis base (3-aminopropyl)trimethoxysilane (APTMS). We demonstrate average minority carrier lifetimes >4 µs, nearly single exponential monomolecular photoluminescence decays, and high external photoluminescence quantum efficiencies (>20%, corresponding to ~97% of the maximum theoretical quasi-Fermi-level splitting) at low excitation fluence. We confirm both the composition and valence band edge position of the FA0.83Cs0.17Pb(I0.85Br0.15)3 perovskite using multi-institutional, cross-validated, X-ray photoelectron spectroscopy and UV photoelectron spectroscopy measurements. We extend the APTMS surface passivation to higher bandgap double-cation (FA and Cs) compositions (1.7, 1.75, and 1.8 eV) asmore »« less
https://doi.org/10.1021/acs.chemmater.1c00848

Other research related to this record:

CCDC 1567819: Experimental Crystal Structure Determination: NEHTUS : catena-(bis(methylammonium) hexakis(μ-bromo)-bismuth-thallium)
dataset, August 2017

Slavney, Adam; Leppert, Linn; Bartesaghi, Davide
Cambridge Structural Database (CSD)
DOI: 10.5517/ccdc.csd.cc1pmftk
This dataset is a supplement to the current record

CCDC 1567818: Experimental Crystal Structure Determination: NEHTOM : Non-CSD Structure
dataset, August 2017

Slavney, Adam H.; Leppert, Linn; Bartesaghi, Davide
Cambridge Structural Database (CSD)
DOI: 10.5517/ccdc.csd.cc1pmfsj
This dataset is a supplement to the current record

CCDC 1567820: Experimental Crystal Structure Determination: OQUTUR01 : catena-(bis(methylammonium) hexakis(μ-bromo)-bismuth-thallium)
dataset, August 2017

Slavney, Adam; Leppert, Linn; Bartesaghi, Davide
Cambridge Structural Database (CSD)
DOI: 10.5517/ccdc.csd.cc1pmfvl
This dataset is a supplement to the current record

Similar Records
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dataset (3)

Title: Defect-induced band-edge reconstruction of a bismuth-halide double perovskite for visible-light absorption

Abstract

Citation Formats

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells journal, May 2009

Metal halide perovskites for energy applications journal, May 2016

Lead Poisoning journal, February 2004

Toxicity of organometal halide perovskite solar cells journal, February 2016

Chemical Approaches to Addressing the Instability and Toxicity of Lead–Halide Perovskite Absorbers journal, August 2016

A Bismuth-Halide Double Perovskite with Long Carrier Recombination Lifetime for Photovoltaic Applications journal, February 2016

Cs 2 AgBiX 6 (X = Br, Cl): New Visible Light Absorbing, Lead-Free Halide Perovskite Semiconductors journal, February 2016

Lead-Free Halide Double Perovskites via Heterovalent Substitution of Noble Metals journal, March 2016

The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA) 2 KBiCl 6 (MA = methylammonium) journal, January 2016

Exploring the properties of lead-free hybrid double perovskites using a combined computational-experimental approach journal, January 2016

Cs 2 InAgCl 6 : A New Lead-Free Halide Double Perovskite with Direct Band Gap journal, January 2017

Hybrid perovskites for photovoltaics: Insights from first principles journal, March 2014

XANES Studies of Thallium Compounds and Valence States and Local Environment of Thallium in Some of its Superconducting Cuprates journal, January 2005

Generalized Gradient Approximation Made Simple journal, October 1996

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal, October 1996

Revealing the Dynamics of Charge Carriers in Polymer:Fullerene Blends Using Photoinduced Time-Resolved Microwave Conductivity journal, October 2013

Charge Carrier Lifetimes Exceeding 15 μs in Methylammonium Lead Iodide Single Crystals journal, February 2016

Relativistic quasiparticle self-consistent electronic structure of hybrid halide perovskite photovoltaic absorbers journal, April 2014

Red Shift of Photoluminescence and Absorption in Dilute GaAsN Alloy Layers journal, July 1992

New Visible Light Absorbing Materials for Solar Fuels, Ga(Sb x )N 1− x journal, February 2014

Anomalous Band Gap Behavior in Mixed Sn and Pb Perovskites Enables Broadening of Absorption Spectrum in Solar Cells journal, May 2014

Heterovalent Dopant Incorporation for Bandgap and Type Engineering of Perovskite Crystals journal, January 2016

Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication journal, January 2018

Perovskite Solar Absorbers: Materials by Design journal, March 2018

Long Electron-Hole Diffusion Length in High-Quality Lead-Free Double Perovskite Films journal, March 2018

Investigation of the Mn dopant-enhanced photoluminescence performance of lead-free Cs 2 AgInCl 6 double perovskite crystals journal, January 2020

Structural, elastic, electronic and optical properties of lead-free halide double perovskite Cs 2 AgBiX 6 (X = Cl, Br, and I) journal, September 2019

Bandgap Engineering of Lead-Free Double Perovskite Cs 2 AgBiBr 6 through Trivalent Metal Alloying journal, June 2017

Perovskite solar cells: must lead be replaced – and can it be done? journal, May 2018

Single-Source Vapor-Deposited Cs2AgBiBr6 Thin Films for Lead-Free Perovskite Solar Cells journal, December 2019

Small-Band-Gap Halide Double Perovskites journal, August 2018

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications journal, October 2019

Synthesis and Photocatalytic Application of Stable Lead-Free Cs 2 AgBiBr 6 Perovskite Nanocrystals journal, January 2018

Extending lead-free hybrid photovoltaic materials to new structures: thiazolium, aminothiazolium and imidazolium iodobismuthates journal, January 2018

Reversible Band Gap Narrowing of Sn-Based Hybrid Perovskite Single Crystal with Excellent Phase Stability journal, October 2018

Strongly Coupled Tin-Halide Perovskites to Modulate Light Emission: Tunable 550-640 nm Light Emission (FWHM 36-80 nm) with a Quantum Yield of up to 6.4% journal, March 2018

Structural and Functional Diversity in Lead‐Free Halide Perovskite Materials journal, April 2019

Optoelectronic Properties and Defect Physics of Lead-Free Photovoltaic Absorbers Cs 2 Au I Au III X 6 ( X = I , Br ) journal, January 2020

The Dawn of Lead-Free Perovskite Solar Cell: Highly Stable Double Perovskite Cs 2 AgBiBr 6 Film journal, December 2017

Progress of Lead‐Free Halide Double Perovskites journal, January 2019

Lead-Free Halide Double Perovskites: A Review of the Structural, Optical, and Stability Properties as Well as Their Viability to Replace Lead Halide Perovskites journal, August 2018

Low-Bandgap Cs 4 CuSb 2 Cl 12 Layered Double Perovskite: Synthesis, Reversible Thermal Changes, and Magnetic Interaction journal, July 2018

Bismuth Halide Perovskite‐Like Materials: Current Opportunities and Challenges journal, March 2019

Chemical Origin of the Stability Difference between Copper(I)- and Silver(I)-Based Halide Double Perovskites journal, August 2017

The Optical Band-Gap Evolution in Perovskite-Like Hybrid Iodobismuthates Effected by Nuclearity and Dimension: An Experimental and DFT Calculation Study journal, May 2019

Lead‐Free Double Perovskites for Perovskite Solar Cells journal, August 2019

A Review on Energy Band‐Gap Engineering for Perovskite Photovoltaics journal, September 2019

Tunable optical absorption in lead-free perovskite-like hybrids by iodide management journal, January 2019

Structurally Stabilizing and Environment Friendly Triggers: Double‐Metallic Lead‐Free Perovskites journal, May 2019

Bandgap Optimization of Perovskite Semiconductors for Photovoltaic Applications journal, January 2018

Submillimeter and lead-free Cs 3 Sb 2 Br 9 perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors journal, January 2019

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives journal, January 2019

Alternative Perovskites for Photovoltaics journal, April 2018

Synthesis, crystal structure, magnetic and electronic properties of the caesium-based transition metal halide Cs 3 Fe 2 Br 9 journal, January 2018

Lead-Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too? journal, November 2017

Thermochromic Lead‐Free Halide Double Perovskites journal, March 2019

From Pb to Bi: A Promising Family of Pb‐Free Optoelectronic Materials and Devices journal, April 2020

Impacts of cation ordering on bandgap dispersion of double perovskites journal, August 2018

Cs 2 AgBiBr 6−x Cl x solid solutions – band gap engineering with halide double perovskites journal, January 2019

Local stress enhanced photocurrent of visible light photo-detection in Cs 2 AgBiBr 6 single crystal journal, September 2019

Inorganic CsPbI 3 Perovskite-Based Solar Cells: A Choice for a Tandem Device journal, June 2017

Rational design of a triiodide-intercalated dielectric-switching hybrid for visible-light absorption journal, January 2018

Bandgap Engineering of Lead-Free Double Perovskite Cs 2 AgBiBr 6 through Trivalent Metal Alloying journal, June 2017

Small-Band-Gap Halide Double Perovskites journal, August 2018

A Review on Energy Band‐Gap Engineering for Perovskite Photovoltaics journal, December 2019

Reversible Band Gap Narrowing of Sn-Based Hybrid Perovskite Single Crystal with Excellent Phase Stability journal, October 2018

Double Perovskites overtaking the single perovskites : A set of new solar harvesting materials with much higher stability and efficiency text, January 2018

Band-Like Charge Transport in Cs 2 AgBiBr 6 and Mixed Antimony–Bismuth Cs 2 AgBi 1– x Sb x Br 6 Halide Double Perovskites journal, September 2018

Perovskite solar cells: must lead be replaced – and can it be done? journal, May 2018

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
journal, May 2009

Metal halide perovskites for energy applications
journal, May 2016

Lead Poisoning
journal, February 2004

Toxicity of organometal halide perovskite solar cells
journal, February 2016

Chemical Approaches to Addressing the Instability and Toxicity of Lead–Halide Perovskite Absorbers
journal, August 2016

A Bismuth-Halide Double Perovskite with Long Carrier Recombination Lifetime for Photovoltaic Applications
journal, February 2016

Cs ₂ AgBiX ₆ (X = Br, Cl): New Visible Light Absorbing, Lead-Free Halide Perovskite Semiconductors
journal, February 2016

Lead-Free Halide Double Perovskites via Heterovalent Substitution of Noble Metals
journal, March 2016

The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA) ₂ KBiCl ₆ (MA = methylammonium)
journal, January 2016

Exploring the properties of lead-free hybrid double perovskites using a combined computational-experimental approach
journal, January 2016

Cs ₂ InAgCl ₆ : A New Lead-Free Halide Double Perovskite with Direct Band Gap
journal, January 2017

Hybrid perovskites for photovoltaics: Insights from first principles
journal, March 2014

XANES Studies of Thallium Compounds and Valence States and Local Environment of Thallium in Some of its Superconducting Cuprates
journal, January 2005

Generalized Gradient Approximation Made Simple
journal, October 1996

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996

Revealing the Dynamics of Charge Carriers in Polymer:Fullerene Blends Using Photoinduced Time-Resolved Microwave Conductivity
journal, October 2013

Charge Carrier Lifetimes Exceeding 15 μs in Methylammonium Lead Iodide Single Crystals
journal, February 2016

Relativistic quasiparticle self-consistent electronic structure of hybrid halide perovskite photovoltaic absorbers
journal, April 2014

Red Shift of Photoluminescence and Absorption in Dilute GaAsN Alloy Layers
journal, July 1992

New Visible Light Absorbing Materials for Solar Fuels, Ga(Sb _x )N _{1− x}
journal, February 2014

Anomalous Band Gap Behavior in Mixed Sn and Pb Perovskites Enables Broadening of Absorption Spectrum in Solar Cells
journal, May 2014

Heterovalent Dopant Incorporation for Bandgap and Type Engineering of Perovskite Crystals
journal, January 2016

Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication
journal, January 2018

Perovskite Solar Absorbers: Materials by Design
journal, March 2018

Long Electron-Hole Diffusion Length in High-Quality Lead-Free Double Perovskite Films
journal, March 2018

Investigation of the Mn dopant-enhanced photoluminescence performance of lead-free Cs ₂ AgInCl ₆ double perovskite crystals
journal, January 2020

Structural, elastic, electronic and optical properties of lead-free halide double perovskite Cs ₂ AgBiX ₆ (X = Cl, Br, and I)
journal, September 2019

Bandgap Engineering of Lead-Free Double Perovskite Cs ₂ AgBiBr ₆ through Trivalent Metal Alloying
journal, June 2017

Perovskite solar cells: must lead be replaced – and can it be done?
journal, May 2018

Single-Source Vapor-Deposited Cs2AgBiBr6 Thin Films for Lead-Free Perovskite Solar Cells
journal, December 2019

Small-Band-Gap Halide Double Perovskites
journal, August 2018

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications
journal, October 2019

Synthesis and Photocatalytic Application of Stable Lead-Free Cs ₂ AgBiBr ₆ Perovskite Nanocrystals
journal, January 2018

Extending lead-free hybrid photovoltaic materials to new structures: thiazolium, aminothiazolium and imidazolium iodobismuthates
journal, January 2018

Reversible Band Gap Narrowing of Sn-Based Hybrid Perovskite Single Crystal with Excellent Phase Stability
journal, October 2018

Strongly Coupled Tin-Halide Perovskites to Modulate Light Emission: Tunable 550-640 nm Light Emission (FWHM 36-80 nm) with a Quantum Yield of up to 6.4%
journal, March 2018

Structural and Functional Diversity in Lead‐Free Halide Perovskite Materials
journal, April 2019

Optoelectronic Properties and Defect Physics of Lead-Free Photovoltaic Absorbers ${Cs}_{2} {Au}^{I} {Au}^{III} X_{6}$ ( $X = I, Br$ )
journal, January 2020

The Dawn of Lead-Free Perovskite Solar Cell: Highly Stable Double Perovskite Cs ₂ AgBiBr ₆ Film
journal, December 2017

Progress of Lead‐Free Halide Double Perovskites
journal, January 2019

Lead-Free Halide Double Perovskites: A Review of the Structural, Optical, and Stability Properties as Well as Their Viability to Replace Lead Halide Perovskites
journal, August 2018

Low-Bandgap Cs ₄ CuSb ₂ Cl ₁₂ Layered Double Perovskite: Synthesis, Reversible Thermal Changes, and Magnetic Interaction
journal, July 2018

Bismuth Halide Perovskite‐Like Materials: Current Opportunities and Challenges
journal, March 2019

Chemical Origin of the Stability Difference between Copper(I)- and Silver(I)-Based Halide Double Perovskites
journal, August 2017

The Optical Band-Gap Evolution in Perovskite-Like Hybrid Iodobismuthates Effected by Nuclearity and Dimension: An Experimental and DFT Calculation Study
journal, May 2019

Lead‐Free Double Perovskites for Perovskite Solar Cells
journal, August 2019

A Review on Energy Band‐Gap Engineering for Perovskite Photovoltaics
journal, September 2019

Tunable optical absorption in lead-free perovskite-like hybrids by iodide management
journal, January 2019

Structurally Stabilizing and Environment Friendly Triggers: Double‐Metallic Lead‐Free Perovskites
journal, May 2019

Bandgap Optimization of Perovskite Semiconductors for Photovoltaic Applications
journal, January 2018

Submillimeter and lead-free Cs ₃ Sb ₂ Br ₉ perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors
journal, January 2019

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives
journal, January 2019

Alternative Perovskites for Photovoltaics
journal, April 2018

Synthesis, crystal structure, magnetic and electronic properties of the caesium-based transition metal halide Cs ₃ Fe ₂ Br ₉
journal, January 2018

Lead-Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too?
journal, November 2017

Thermochromic Lead‐Free Halide Double Perovskites
journal, March 2019

From Pb to Bi: A Promising Family of Pb‐Free Optoelectronic Materials and Devices
journal, April 2020

Impacts of cation ordering on bandgap dispersion of double perovskites
journal, August 2018

Cs ₂ AgBiBr _6−x Cl _x solid solutions – band gap engineering with halide double perovskites
journal, January 2019

Local stress enhanced photocurrent of visible light photo-detection in Cs ₂ AgBiBr ₆ single crystal
journal, September 2019

Inorganic CsPbI ₃ Perovskite-Based Solar Cells: A Choice for a Tandem Device
journal, June 2017

Rational design of a triiodide-intercalated dielectric-switching hybrid for visible-light absorption
journal, January 2018

Bandgap Engineering of Lead-Free Double Perovskite Cs ₂ AgBiBr ₆ through Trivalent Metal Alloying
journal, June 2017

Small-Band-Gap Halide Double Perovskites
journal, August 2018

A Review on Energy Band‐Gap Engineering for Perovskite Photovoltaics
journal, December 2019

Reversible Band Gap Narrowing of Sn-Based Hybrid Perovskite Single Crystal with Excellent Phase Stability
journal, October 2018

Double Perovskites overtaking the single perovskites : A set of new solar harvesting materials with much higher stability and efficiency
text, January 2018

Band-Like Charge Transport in Cs ₂ AgBiBr ₆ and Mixed Antimony–Bismuth Cs ₂ AgBi _{1– x} Sb _x Br ₆ Halide Double Perovskites
journal, September 2018

Perovskite solar cells: must lead be replaced – and can it be done?
journal, May 2018