Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Photoinduced Phase Segregation in Mixed Halide Perovskites: Thermodynamic and Kinetic Aspects of Cl–Br Segregation

Journal Article · · Advanced Optical Materials
 [1];  [2]
  1. Radiation Laboratory University of Notre Dame Notre Dame IN 46556 USA
  2. Radiation Laboratory University of Notre Dame Notre Dame IN 46556 USA, Department of Chemistry and Biochemistry University of Notre Dame Notre Dame IN 46556 USA, Department of Chemical and Biomolecular Engineering University of Notre Dame Notre Dame IN 46556 USA
Abstract

Suppression of halide ion mobility remains a key issue in defining the device performances and stability of perovskite solar cells. The halide ion migration is facilitated by the lattice‐distortion‐mediated halide vacancy and hence dictated by the polarizability (or rigidity) of the halide sublattice and framework. Photoinduced halide ion segregation and dark recovery of MAPb(Cl 0.5 Br 0.5 ) 3 films are now probed. The temperature dependence of the rate constants of segregation and dark remixing allow to determine the activation energy barriers ( E a ) for photosegregation (38 kJ mol −1 ) and dark recovery (42 kJ mol −1 ). A comparison of the segregation activation energy ( E a ) and excitation intensity threshold between MAPb(Cl 0.5 Br 0.5 ) 3 and MAPb(Br 0.5 I 0.5 ) 3 films reflects that the presence of Cl stabilizes mixed halide composition. The thermodynamic stabilization is attributed to the formation of more rigid [PbX 6 ] 4− frameworks with an increased barrier for halide ion migration. The thermodynamic rationale behind the intriguing halide ion mobility offers a fundamental insight into the role of Cl and design principle of perovskite solar cells with improved efficiency and long‐term stability.

Sponsoring Organization:
USDOE
Grant/Contract Number:
FC02-04ER15533
OSTI ID:
1785810
Alternate ID(s):
OSTI ID: 1849008
Journal Information:
Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 18 Vol. 9; ISSN 2195-1071
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (63)

Progress toward Stable Lead Halide Perovskite Solar Cells journal October 2018
Multi-cation Synergy Suppresses Phase Segregation in Mixed-Halide Perovskites journal July 2019
Routes toward Long-Term Stability of Mixed-Halide Perovskites journal April 2020
Photoinduced Anion Segregation in Mixed Halide Perovskites journal April 2020
How Chloride Suppresses Photoinduced Phase Segregation in Mixed Halide Perovskites journal June 2020
Ligand-Mediated Modulation of Layer Thicknesses of Perovskite Methylammonium Lead Bromide Nanoplatelets journal September 2016
Ligand-Directed Stabilization of Ternary Phases: Synthetic Control of Structural Dimensionality in Solution-Grown Cesium Lead Bromide Nanocrystals journal August 2018
Charge Carrier Recombination Dynamics of Two-Dimensional Lead Halide Perovskites journal March 2020
Thermodynamic Origin of Photoinstability in the CH 3 NH 3 Pb(I 1– x Br x ) 3 Hybrid Halide Perovskite Alloy journal March 2016
Surface Polarization Model for the Dynamic Hysteresis of Perovskite Solar Cells journal February 2017
Tunable Polaron Distortions Control the Extent of Halide Demixing in Lead Halide Perovskites journal June 2018
Reversible Halide Exchange Reaction of Organometal Trihalide Perovskite Colloidal Nanocrystals for Full-Range Band Gap Tuning journal July 2015
Blue-Green Color Tunable Solution Processable Organolead Chloride–Bromide Mixed Halide Perovskites for Optoelectronic Applications journal August 2015
Fast Anion-Exchange in Highly Luminescent Nanocrystals of Cesium Lead Halide Perovskites (CsPbX 3 , X = Cl, Br, I) journal July 2015
Origin of Reversible Photoinduced Phase Separation in Hybrid Perovskites journal January 2017
Charge Transfer Dynamics of Phase-Segregated Halide Perovskites: CH 3 NH 3 PbCl 3 and CH 3 NH 3 PbI 3 or (C 4 H 9 NH 3 ) 2 (CH 3 NH 3 ) n −1 Pb n I 3 n +1 Mixtures journal February 2019
Iodine (I) Expulsion at Photoirradiated Mixed Halide Perovskite Interface. Should I Stay or Should I Go? journal May 2020
Lattice Compression Increases the Activation Barrier for Phase Segregation in Mixed-Halide Perovskites journal September 2020
Tracking Iodide and Bromide Ion Segregation in Mixed Halide Lead Perovskites during Photoirradiation journal June 2016
Band Edge Energies and Excitonic Transition Probabilities of Colloidal CsPbX 3 (X = Cl, Br, I) Perovskite Nanocrystals journal September 2016
Light-Induced Phase Segregation in Halide-Perovskite Absorbers journal November 2016
Defect-Assisted Photoinduced Halide Segregation in Mixed-Halide Perovskite Thin Films journal May 2017
Shift Happens . How Halide Ion Defects Influence Photoinduced Segregation in Mixed Halide Perovskites journal June 2017
A Victim of Halide Ion Segregation. How Light Soaking Affects Solar Cell Performance of Mixed Halide Lead Perovskites journal July 2017
Light-Induced Anion Phase Segregation in Mixed Halide Perovskites journal November 2017
Minimizing Current and Voltage Losses to Reach 25% Efficient Monolithic Two-Terminal Perovskite–Silicon Tandem Solar Cells journal August 2018
Vacancy-Mediated Anion Photosegregation Kinetics in Mixed Halide Hybrid Perovskites: Coupled Kinetic Monte Carlo and Optical Measurements journal September 2018
Mixed Halide Perovskite Solar Cells. Consequence of Iodide Treatment on Phase Segregation Recovery journal August 2018
Impact of Surfaces on Photoinduced Halide Segregation in Mixed-Halide Perovskites journal October 2018
Electronic Traps and Phase Segregation in Lead Mixed-Halide Perovskite journal November 2018
Bidirectional Halide Ion Exchange in Paired Lead Halide Perovskite Films with Thermal Activation journal July 2019
Thermochemical Stability of Hybrid Halide Perovskites journal October 2019
How Interplay between Photo and Thermal Activation Dictates Halide Ion Segregation in Mixed Halide Perovskites journal November 2019
Suppressed Halide Ion Migration in 2D Lead Halide Perovskites journal April 2020
TiO 2 -Assisted Halide Ion Segregation in Mixed Halide Perovskite Films journal February 2020
Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions journal August 2015
Electrochemical Hole Injection Selectively Expels Iodide from Mixed Halide Perovskite Films journal June 2019
Synergy between Ion Migration and Charge Carrier Recombination in Metal-Halide Perovskites journal January 2020
Chemical Management for Colorful, Efficient, and Stable Inorganic–Organic Hybrid Nanostructured Solar Cells journal March 2013
Ionic polarization-induced current–voltage hysteresis in CH3NH3PbX3 perovskite solar cells journal February 2016
23.6%-efficient monolithic perovskite/silicon tandem solar cells with improved stability journal February 2017
Metal-halide perovskites for photovoltaic and light-emitting devices journal May 2015
The emergence of perovskite solar cells journal July 2014
Rationalizing the light-induced phase separation of mixed halide organic–inorganic perovskites journal August 2017
Color-stable highly luminescent sky-blue perovskite light-emitting diodes journal August 2018
Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals journal February 2018
Large tunable photoeffect on ion conduction in halide perovskites and implications for photodecomposition journal March 2018
Fully textured monolithic perovskite/silicon tandem solar cells with 25.2% power conversion efficiency journal June 2018
Photovoltaic solar cell technologies: analysing the state of the art journal March 2019
Planar perovskite solar cells with long-term stability using ionic liquid additives journal July 2019
Hysteresis and transient behavior in current–voltage measurements of hybrid-perovskite absorber solar cells journal January 2014
Band alignment of the hybrid halide perovskites CH 3 NH 3 PbCl 3 , CH 3 NH 3 PbBr 3 and CH 3 NH 3 PbI 3 journal January 2015
Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics journal January 2015
Can slow-moving ions explain hysteresis in the current–voltage curves of perovskite solar cells? journal January 2016
Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency journal January 2016
Experimental and theoretical optical properties of methylammonium lead halide perovskites journal January 2016
Recent progress of inorganic perovskite solar cells journal January 2019
The efficiency limit of CH 3 NH 3 PbI 3 perovskite solar cells journal June 2015
Direct calorimetric verification of thermodynamic instability of lead halide hybrid perovskites journal June 2016
Spatially resolved multicolor CsPbX 3 nanowire heterojunctions via anion exchange journal June 2017
Intrinsic anion diffusivity in lead halide perovskites is facilitated by a soft lattice journal November 2018
Determination of the miscibility gap in the solid solutions series of methylammonium lead iodide/chloride journal August 2018
Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems journal March 2020

Similar Records

How Interplay between Photo and Thermal Activation Dictates Halide Ion Segregation in Mixed Halide Perovskites
Journal Article · Tue Nov 19 19:00:00 EST 2019 · ACS Energy Letters · OSTI ID:1657796

Halide Ion Migration in Perovskite Nanocrystals and Nanostructures
Journal Article · Wed Jan 20 19:00:00 EST 2021 · Accounts of Chemical Research · OSTI ID:1774775

Related Subjects