Rb as an Alternative Cation for Templating Inorganic Lead-Free Perovskites for Solution Processed Photovoltaics

P. C. Harikesh; Hemant Kumar Mulmudi; Biplab Ghosh; Teck Wee Goh; Yin Ting Teng; Krishnamoorthy Thirumal; Mark Lockrey; Klaus Weber; Teck Ming Koh; Shuzhou Li; Subodh Mhaisalkar; Nripan Mathews

doi:10.1021/acs.chemmater.6b03310

Rb as an Alternative Cation for Templating Inorganic Lead-Free Perovskites for Solution Processed Photovoltaics

P. C. Harikesh, Hemant Kumar Mulmudi^*, Biplab Ghosh, Teck Wee Goh, Yin Ting Teng, Krishnamoorthy Thirumal, Mark Lockrey, Klaus Weber, Teck Ming Koh, Shuzhou Li, Subodh Mhaisalkar, Nripan Mathews

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

271 Citations (Scopus)

Abstract

Even though perovskite solar cells have reached 22% efficiency within a very short span, the presence of lead is a major bottleneck to its commercial application. Tin and germanium based perovskites failed to be viable replacements due to the instability of their +2 oxidation states. Antimony could be a possible replacement, forming perovskites with structure A₃M₂X₉. However, solution processing of Cs, organic ammonium based Sb perovskites result in the formation of the dimer phase with poor charge transport properties. Here we demonstrate that Rb can template the formation of the desired layered phase irrespective of processing methodologies, enabling the demonstration of efficient lead-free perovskite solar cells.

Original language	English
Pages (from-to)	7496-7504
Number of pages	9
Journal	Chemistry of Materials
Volume	28
Issue number	20
DOIs	https://doi.org/10.1021/acs.chemmater.6b03310
Publication status	Published - Oct 25 2016
Externally published	Yes

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Publisher Copyright:
© 2016 American Chemical Society.

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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abstract = "Even though perovskite solar cells have reached 22\% efficiency within a very short span, the presence of lead is a major bottleneck to its commercial application. Tin and germanium based perovskites failed to be viable replacements due to the instability of their +2 oxidation states. Antimony could be a possible replacement, forming perovskites with structure A3M2X9. However, solution processing of Cs, organic ammonium based Sb perovskites result in the formation of the dimer phase with poor charge transport properties. Here we demonstrate that Rb can template the formation of the desired layered phase irrespective of processing methodologies, enabling the demonstration of efficient lead-free perovskite solar cells.",

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AU - Harikesh, P. C.

AU - Mulmudi, Hemant Kumar

AU - Ghosh, Biplab

AU - Goh, Teck Wee

AU - Teng, Yin Ting

AU - Thirumal, Krishnamoorthy

AU - Lockrey, Mark

AU - Weber, Klaus

AU - Koh, Teck Ming

AU - Li, Shuzhou

AU - Mhaisalkar, Subodh

AU - Mathews, Nripan

PY - 2016/10/25

Y1 - 2016/10/25

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AB - Even though perovskite solar cells have reached 22% efficiency within a very short span, the presence of lead is a major bottleneck to its commercial application. Tin and germanium based perovskites failed to be viable replacements due to the instability of their +2 oxidation states. Antimony could be a possible replacement, forming perovskites with structure A3M2X9. However, solution processing of Cs, organic ammonium based Sb perovskites result in the formation of the dimer phase with poor charge transport properties. Here we demonstrate that Rb can template the formation of the desired layered phase irrespective of processing methodologies, enabling the demonstration of efficient lead-free perovskite solar cells.

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Rb as an Alternative Cation for Templating Inorganic Lead-Free Perovskites for Solution Processed Photovoltaics

Abstract

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