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Title: Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells

Abstract

Organic-inorganic hybrid two-dimensional (2D) perovskites ( n≤5) have recently attracted significant attention due to their promising stability and optoelectronic properties. Normally, 2D perovskites contain a mono cation (e.g., methylammonium (MA +) or formamidinium (FA +)]. Here, we report for the first time on fabricating 2D perovskites ( n=5) with mixed cations of MA +, FA +, and cesium (Cs +). The use of these triple cations leads to the formation of a smooth, compact surface morphology with larger grain size and fewer grain boundaries compared to the conventional MA-based counterpart. The resulting perovskite also exhibits longer carrier lifetime and higher conductivity in triple-cation 2D perovskite solar cells (PSCs). Furthermore, the power conversion efficiency (PCE) of 2D PSCs with triple cations was enhanced by more than 80% (from 7.80% to 14.23%) compared to PSCs fabricated with a mono cation; the PCE is also higher than that of PSCs based on binary-cation (MA +-FA + or MA +-Cs +) 2D structures.

Authors:
 [1];  [2]; ORCiD logo [2];  [2];  [2];  [3];  [2]; ORCiD logo [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1529867
Alternate Identifier(s):
OSTI ID: 1548759
Report Number(s):
NREL/JA-5900-73862
Journal ID: ISSN 1433-7851
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 58; Journal Issue: 34; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; triple cations; charge transport; cation doping

Citation Formats

Gao, Liguo, Zhang, Fei, Chen, Xihan, Xiao, Chuanxiao, Larson, Bryon W., Dunfield, Sean P., Berry, Joseph J., and Zhu, Kai. Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells. United States: N. p., 2019. Web. doi:10.1002/anie.201905690.
Gao, Liguo, Zhang, Fei, Chen, Xihan, Xiao, Chuanxiao, Larson, Bryon W., Dunfield, Sean P., Berry, Joseph J., & Zhu, Kai. Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells. United States. doi:10.1002/anie.201905690.
Gao, Liguo, Zhang, Fei, Chen, Xihan, Xiao, Chuanxiao, Larson, Bryon W., Dunfield, Sean P., Berry, Joseph J., and Zhu, Kai. Wed . "Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells". United States. doi:10.1002/anie.201905690.
@article{osti_1529867,
title = {Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells},
author = {Gao, Liguo and Zhang, Fei and Chen, Xihan and Xiao, Chuanxiao and Larson, Bryon W. and Dunfield, Sean P. and Berry, Joseph J. and Zhu, Kai},
abstractNote = {Organic-inorganic hybrid two-dimensional (2D) perovskites (n≤5) have recently attracted significant attention due to their promising stability and optoelectronic properties. Normally, 2D perovskites contain a mono cation (e.g., methylammonium (MA+) or formamidinium (FA+)]. Here, we report for the first time on fabricating 2D perovskites (n=5) with mixed cations of MA+, FA+, and cesium (Cs+). The use of these triple cations leads to the formation of a smooth, compact surface morphology with larger grain size and fewer grain boundaries compared to the conventional MA-based counterpart. The resulting perovskite also exhibits longer carrier lifetime and higher conductivity in triple-cation 2D perovskite solar cells (PSCs). Furthermore, the power conversion efficiency (PCE) of 2D PSCs with triple cations was enhanced by more than 80% (from 7.80% to 14.23%) compared to PSCs fabricated with a mono cation; the PCE is also higher than that of PSCs based on binary-cation (MA+-FA+ or MA+-Cs+) 2D structures.},
doi = {10.1002/anie.201905690},
journal = {Angewandte Chemie (International Edition)},
number = 34,
volume = 58,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

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

  • Kojima, Akihiro; Teshima, Kenjiro; Shirai, Yasuo
  • Journal of the American Chemical Society, Vol. 131, Issue 17, p. 6050-6051
  • DOI: 10.1021/ja809598r