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Title: Cation Migration in Physically Paired 2D and 3D Lead Halide Perovskite Films

Abstract

Abstract 2D/3D interfaces provide long‐term stability for the operation of metal halide perovskite solar cells. However, the cation migration under heat and light can disturb the interface and create a graded cation interface. This study has now probed the cation migration by physically pairing X 2 PbI 4 (X = butylammonium BA, oleylammonium OA, or phenethylammonium PEA) 2D film and (CH 3 NH 3 , MA)PbI 3 3D film at different temperatures and recording changes in the absorption and emission spectra. The migration of the methyl ammonium cation toward the 2D film slowly transforms the n = 1 layered phase into n = 2 and 3 layered phases. The 3D film, on the other hand, exhibits relatively small changes, as the inclusion of spacer cation has little effect on its phase. The apparent activation energy determined from the temperature‐dependent cation migration kinetics ( E a = 29– 50 kJ mol −1 ) indicates alkyl ammonium cations such as butyl ammonium migrate more readily into the 3D layer than aromatic cations such as PEA. The ease of migration of spacer cations between physically paired films suggests that the varied composition at the interface should be considered while evaluating the effectiveness of the 2D/3Dmore » design strategy for improving the performance of perovskite solar cells.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. University of Notre Dame, IN (United States)
Publication Date:
Research Org.:
University of Notre Dame, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE
OSTI Identifier:
2338295
Alternate Identifier(s):
OSTI ID: 2324715
Grant/Contract Number:  
SC0014334; FC02-04ER15533
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Volume: 12; Journal Issue: 8; Journal ID: ISSN 2195-1071
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Cation migration; 2D/3D perovskite; heat; spacer cation

Citation Formats

Mathew, Prrethi S., and Kamat, Prashant V. Cation Migration in Physically Paired 2D and 3D Lead Halide Perovskite Films. United States: N. p., 2023. Web. doi:10.1002/adom.202300957.
Mathew, Prrethi S., & Kamat, Prashant V. Cation Migration in Physically Paired 2D and 3D Lead Halide Perovskite Films. United States. https://doi.org/10.1002/adom.202300957
Mathew, Prrethi S., and Kamat, Prashant V. Sat . "Cation Migration in Physically Paired 2D and 3D Lead Halide Perovskite Films". United States. https://doi.org/10.1002/adom.202300957.
@article{osti_2338295,
title = {Cation Migration in Physically Paired 2D and 3D Lead Halide Perovskite Films},
author = {Mathew, Prrethi S. and Kamat, Prashant V.},
abstractNote = {Abstract 2D/3D interfaces provide long‐term stability for the operation of metal halide perovskite solar cells. However, the cation migration under heat and light can disturb the interface and create a graded cation interface. This study has now probed the cation migration by physically pairing X 2 PbI 4 (X = butylammonium BA, oleylammonium OA, or phenethylammonium PEA) 2D film and (CH 3 NH 3 , MA)PbI 3 3D film at different temperatures and recording changes in the absorption and emission spectra. The migration of the methyl ammonium cation toward the 2D film slowly transforms the n = 1 layered phase into n = 2 and 3 layered phases. The 3D film, on the other hand, exhibits relatively small changes, as the inclusion of spacer cation has little effect on its phase. The apparent activation energy determined from the temperature‐dependent cation migration kinetics ( E a = 29– 50 kJ mol −1 ) indicates alkyl ammonium cations such as butyl ammonium migrate more readily into the 3D layer than aromatic cations such as PEA. The ease of migration of spacer cations between physically paired films suggests that the varied composition at the interface should be considered while evaluating the effectiveness of the 2D/3D design strategy for improving the performance of perovskite solar cells.},
doi = {10.1002/adom.202300957},
journal = {Advanced Optical Materials},
number = 8,
volume = 12,
place = {United States},
year = {Sat Aug 26 00:00:00 EDT 2023},
month = {Sat Aug 26 00:00:00 EDT 2023}
}

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