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Title: Myths and reality of HPbI 3 in halide perovskite solar cells

Abstract

All-inorganic perovskites have a special place in halide perovskite family because of their potential for better stability. However, the representative cesium lead iodide (CsPbI 3) is metastable and spontaneously converts to the non-perovskite structure at room temperature. Here, we demonstrate that what appears to be all-inorganic CsPbI 3 stabilized in its perovskite form using the purported intermediate known as hydrogen lead iodide (HPbI 3) is, in fact, the hybrid perovskite cesium dimethylammonium lead iodide (Cs 1-xDMA xPbI 3, x = 0.2 to 0.5). Thus, many of the reported all-inorganic perovskites are actually still hybrid organic-inorganic perovskites, as strongly evidenced by a wide battery of experimental techniques presented here. Solar cells based on the representative composition Cs 0.7DMA 0.3PbI 3 can achieve an average power conversion efficiency of 9.27 ± 1.28% (max 12.62%). These results provide an alternative angle to look at previous results pertaining all-inorganic CsPbI 3 while the DMA cation is now revealed as an alternative A site cation.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
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  1. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Light Energy Activated Redox Processes (LEAP); Northwestern Univ., Evanston, IL (United States); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1566604
Grant/Contract Number:  
SC0001059; SC0012541
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; catalysis (homogeneous); catalysis (heterogeneous); solar (photovoltaic); solar (fuels); optics; phonons, photosynthesis (natural and artificial); bio-inspired; hydrogen and fuel cells; charge transport; magnetism and spin physics; materials and chemistry by design; mesostructured materials; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing)

Citation Formats

Ke, Weijun, Spanopoulos, Ioannis, Stoumpos, Constantinos C., and Kanatzidis, Mercouri G. Myths and reality of HPbI3 in halide perovskite solar cells. United States: N. p., 2018. Web. doi:10.1038/s41467-018-07204-y.
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Ke, Weijun, Spanopoulos, Ioannis, Stoumpos, Constantinos C., & Kanatzidis, Mercouri G. Myths and reality of HPbI3 in halide perovskite solar cells. United States. doi:10.1038/s41467-018-07204-y.
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Ke, Weijun, Spanopoulos, Ioannis, Stoumpos, Constantinos C., and Kanatzidis, Mercouri G. Wed . "Myths and reality of HPbI3 in halide perovskite solar cells". United States. doi:10.1038/s41467-018-07204-y. https://www.osti.gov/servlets/purl/1566604.
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@article{osti_1566604,
title = {Myths and reality of HPbI3 in halide perovskite solar cells},
author = {Ke, Weijun and Spanopoulos, Ioannis and Stoumpos, Constantinos C. and Kanatzidis, Mercouri G.},
abstractNote = {All-inorganic perovskites have a special place in halide perovskite family because of their potential for better stability. However, the representative cesium lead iodide (CsPbI3) is metastable and spontaneously converts to the non-perovskite structure at room temperature. Here, we demonstrate that what appears to be all-inorganic CsPbI3 stabilized in its perovskite form using the purported intermediate known as hydrogen lead iodide (HPbI3) is, in fact, the hybrid perovskite cesium dimethylammonium lead iodide (Cs1-xDMAxPbI3, x = 0.2 to 0.5). Thus, many of the reported all-inorganic perovskites are actually still hybrid organic-inorganic perovskites, as strongly evidenced by a wide battery of experimental techniques presented here. Solar cells based on the representative composition Cs0.7DMA0.3PbI3 can achieve an average power conversion efficiency of 9.27 ± 1.28% (max 12.62%). These results provide an alternative angle to look at previous results pertaining all-inorganic CsPbI3 while the DMA cation is now revealed as an alternative A site cation.},
doi = {10.1038/s41467-018-07204-y},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {11}
}
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DOI:  10.1038/s41467-018-07204-y
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Works referenced in this record:

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CsSnI3 : Semiconductor or Metal? High Electrical Conductivity and Strong Near-Infrared Photoluminescence from a Single Material. High Hole Mobility and Phase-Transitions
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