skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Strain-relaxed tetragonal MAPbI3 results in efficient mesoporous solar cells

Journal Article · · Nano Energy
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Beijing Jiaotong Univ. (China)
  3. Hubei Univ., Wuhan (China)

In mesoporous organo-halide perovskite solar cells, the coexistence of tetragonal phase and cubic phase in the perovskite layer is found to result in strained crystal structure at the mesoporous TiO2 (mp-TiO2)/perovskite heterointerface. This results in structural defects pinholes, grain boundaries, and interfacial porosity which is detrimental towards photovoltaic performance and device stability. The strain at the interface originates from the lattice mismatch between the mp-TiO2 nanoparticles (NPs) and perovskite. Here, a transformative approach is demonstrated to realize relaxed and high purity tetragonal phase MAPbI3 (RP) near the mp-TiO2 interface region. This approach involves inserting a ~2 nm lattice matched buffer layer of cubic CsPbBr3 between mp-TiO2 NPs and MAPbI3, which serves as a template for epitaxial growth for top MAPbI3. As a result, the solar cell with relaxed MAPbI3 shows a power conversion efficiency (PCE) of 22.12% with significantly enhanced environmental, light, and thermal stability.

Research Organization:
NanoSonic Inc., Pembroke, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0019844
OSTI ID:
1808291
Alternate ID(s):
OSTI ID: 1780324
Journal Information:
Nano Energy, Vol. 83; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (63)

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells journal May 2009
Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9% journal August 2012
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites journal October 2012
Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells journal June 2017
Surface passivation of perovskite film for efficient solar cells journal April 2019
Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells journal July 2014
Polymer-templated nucleation and crystal growth of perovskite films for solar cells with efficiency greater than 21% journal September 2016
Compositional engineering of perovskite materials for high-performance solar cells journal January 2015
Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency journal January 2016
A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells journal July 2018
Colloidally prepared La-doped BaSnO 3 electrodes for efficient, photostable perovskite solar cells journal March 2017
High-performance photovoltaic perovskite layers fabricated through intramolecular exchange journal May 2015
Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance journal September 2016
Methylammonium Chloride Induces Intermediate Phase Stabilization for Efficient Perovskite Solar Cells journal September 2019
Lattice strain causes non-radiative losses in halide perovskites journal January 2019
A Nonionic and Low-Entropic MA(MMA)nPbI3-Ink for Fast Crystallization of Perovskite Thin Films journal March 2020
Strain engineering and epitaxial stabilization of halide perovskites journal January 2020
Thermal unequilibrium of strained black CsPbI 3 thin films journal July 2019
Regulating strain in perovskite thin films through charge-transport layers journal March 2020
Strain Relaxation and Light Management in Tin–Lead Perovskite Solar Cells to Achieve High Efficiencies journal July 2019
Light-induced lattice expansion leads to high-efficiency perovskite solar cells journal April 2018
Strained hybrid perovskite thin films and their impact on the intrinsic stability of perovskite solar cells journal November 2017
Strain engineering in perovskite solar cells and its impacts on carrier dynamics journal February 2019
Efficient and Stable Low-Bandgap Perovskite Solar Cells Enabled by a CsPbBr 3 -Cluster Assisted Bottom-up Crystallization Approach journal November 2019
High spectral resolution of gamma-rays at room temperature by perovskite CsPbBr3 single crystals journal April 2018
Transformation of Sintered CsPbBr 3 Nanocrystals to Cubic CsPbI 3 and Gradient CsPbBr x I 3– x through Halide Exchange journal June 2016
Thermochromic halide perovskite solar cells journal January 2018
Ligand Assisted Transformation of Cubic CsPbBr 3 Nanocrystals into Two-Dimensional CsPb 2 Br 5 Nanosheets journal November 2017
Solution-Phase Synthesis of Cesium Lead Halide Perovskite Nanowires journal July 2015
Microscopic Electrochemical Control of Ag Nanoparticles into Mesoporous TiO 2 Thin Films journal January 2019
Ultralow thermal conductivity in all-inorganic halide perovskites journal July 2017
Atomic Resolution Imaging of Halide Perovskites journal November 2016
Water-Assisted Size and Shape Control of CsPbBr 3 Perovskite Nanocrystals journal February 2018
Ultrahigh Durability Perovskite Solar Cells journal January 2019
Isothermally crystallized perovskites at room-temperature journal January 2020
Artemisinin (ART)-Induced “perovskite/perovskite” bilayer structured photovoltaics journal December 2020
Monolayer-like hybrid halide perovskite films prepared by additive engineering without antisolvents for solar cells journal January 2018
Halide Perovskite Photovoltaics: Background, Status, and Future Prospects journal March 2019
Single-Crystal MAPbI 3 Perovskite Solar Cells Exceeding 21% Power Conversion Efficiency journal May 2019
Highly Reproducible Perovskite Solar Cells with Average Efficiency of 18.3% and Best Efficiency of 19.7% Fabricated via Lewis Base Adduct of Lead(II) Iodide journal July 2015
α-CsPbI 3 Nanocrystals by Ultraviolet Light-Driven Oriented Attachment journal January 2020
Origin and elimination of photocurrent hysteresis by fullerene passivation in CH3NH3PbI3 planar heterojunction solar cells journal December 2014
Record Efficiency Stable Flexible Perovskite Solar Cell Using Effective Additive Assistant Strategy journal July 2018
High-efficiency robust perovskite solar cells on ultrathin flexible substrates journal January 2016
Hysteresis-Suppressed High-Efficiency Flexible Perovskite Solar Cells Using Solid-State Ionic-Liquids for Effective Electron Transport journal May 2016
High-quality bulk hybrid perovskite single crystals within minutes by inverse temperature crystallization journal July 2015
Electron Mobility and Injection Dynamics in Mesoporous ZnO, SnO 2 , and TiO 2 Films Used in Dye-Sensitized Solar Cells journal May 2011
Carrier trapping and recombination: the role of defect physics in enhancing the open circuit voltage of metal halide perovskite solar cells journal January 2016
In situ observation of heat-induced degradation of perovskite solar cells journal January 2016
Below 200 °C Fabrication Strategy of Black‐Phase CsPbI 3 Film for Ambient‐Air‐Stable Solar Cells journal January 2020
Layer-by-Layer Degradation of Methylammonium Lead Tri-iodide Perovskite Microplates journal November 2017
Structural and Chemical Changes to CH 3 NH 3 PbI 3 Induced by Electron and Gallium Ion Beams journal April 2018
Synthesis of Highly-Oriented Black CsPbI 3 Microstructures for High-Performance Solar Cells journal March 2020
Performance Enhancement of Tri-Cation and Dual-Anion Mixed Perovskite Solar Cells by Au@SiO 2 Nanoparticles journal April 2017
Structural Study on Cubic–Tetragonal Transition of CH 3 NH 3 PbI 3 journal July 2002
Planar perovskite solar cells with long-term stability using ionic liquid additives journal July 2019
Efficient and Ambient-Air-Stable Solar Cell with Highly Oriented 2D@3D Perovskites journal May 2018
Aging effects in interface-engineered perovskite solar cells with 2D nanomaterials: A depth profile analysis journal September 2018
Designable ultra-smooth ultra-thin solid-electrolyte interphases of three alkali metal anodes journal April 2018
Investigating the Growth of CH 3 NH 3 PbI 3 Thin Films on RF‐Sputtered NiO x for Inverted Planar Perovskite Solar Cells: Effect of CH 3 NH 3 + Halide Additives versus CH 3 NH 3 + Halide Vapor Annealing journal December 2019
Cesium Acetate-Induced Interfacial Compositional Change and Graded Band Level in MAPbI 3 Perovskite Solar Cells journal July 2020
Residual PbI 2 Beneficial in the Bulk or at the Interface? An Investigation Study in Sputtered NiO x Hole-Transport-Layer-Based Perovskite Solar Cells journal June 2020
The role of grain boundaries in perovskite solar cells journal March 2018