Lead-free germanium iodide perovskite materials for photovoltaic applications

Thirumal Krishnamoorthy; Hong Ding; Chen Yan; Wei Lin Leong; Tom Baikie; Ziyi Zhang; Matthew Sherburne; Shuzhou Li; Mark Asta; Nripan Mathews; Subodh G. Mhaisalkar

doi:10.1039/c5ta05741h

Lead-free germanium iodide perovskite materials for photovoltaic applications

Thirumal Krishnamoorthy, Hong Ding, Chen Yan, Wei Lin Leong, Tom Baikie, Ziyi Zhang, Matthew Sherburne, Shuzhou Li, Mark Asta, Nripan Mathews^*, Subodh G. Mhaisalkar

^*Corresponding author for this work

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

986 Citations (Scopus)

Abstract

Computational screening based on density-functional-theory calculations reveals Ge as a candidate element for replacing Pb in halide perovskite compounds suitable for light harvesting. Experimentally, three AGeI₃ (A = Cs, CH₃NH₃ or HC(NH₂)₂) halide perovskite materials have been synthesized. These compounds are stable up to 150 °C, and have bandgaps correlated with the A-site cation size. CsGeI₃-based solar cells display higher photocurrents, of about 6 mA cm^-2, but are limited by poor film forming abilities and oxidising tendencies. The present results demonstrate the utility of combining computational screening and experimental efforts to develop lead-free halide perovskite compounds for photovoltaic applications.

Original language	English
Pages (from-to)	23829-23832
Number of pages	4
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	47
DOIs	https://doi.org/10.1039/c5ta05741h
Publication status	Published - 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 The Royal Society of Chemistry.

ASJC Scopus Subject Areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c5ta05741h

Cite this

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title = "Lead-free germanium iodide perovskite materials for photovoltaic applications",

abstract = "Computational screening based on density-functional-theory calculations reveals Ge as a candidate element for replacing Pb in halide perovskite compounds suitable for light harvesting. Experimentally, three AGeI3 (A = Cs, CH3NH3 or HC(NH2)2) halide perovskite materials have been synthesized. These compounds are stable up to 150 °C, and have bandgaps correlated with the A-site cation size. CsGeI3-based solar cells display higher photocurrents, of about 6 mA cm-2, but are limited by poor film forming abilities and oxidising tendencies. The present results demonstrate the utility of combining computational screening and experimental efforts to develop lead-free halide perovskite compounds for photovoltaic applications.",

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doi = "10.1039/c5ta05741h",

language = "English",

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publisher = "Royal Society of Chemistry",

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T1 - Lead-free germanium iodide perovskite materials for photovoltaic applications

AU - Krishnamoorthy, Thirumal

AU - Ding, Hong

AU - Yan, Chen

AU - Leong, Wei Lin

AU - Baikie, Tom

AU - Zhang, Ziyi

AU - Sherburne, Matthew

AU - Li, Shuzhou

AU - Asta, Mark

AU - Mathews, Nripan

AU - Mhaisalkar, Subodh G.

PY - 2015

Y1 - 2015

N2 - Computational screening based on density-functional-theory calculations reveals Ge as a candidate element for replacing Pb in halide perovskite compounds suitable for light harvesting. Experimentally, three AGeI3 (A = Cs, CH3NH3 or HC(NH2)2) halide perovskite materials have been synthesized. These compounds are stable up to 150 °C, and have bandgaps correlated with the A-site cation size. CsGeI3-based solar cells display higher photocurrents, of about 6 mA cm-2, but are limited by poor film forming abilities and oxidising tendencies. The present results demonstrate the utility of combining computational screening and experimental efforts to develop lead-free halide perovskite compounds for photovoltaic applications.

AB - Computational screening based on density-functional-theory calculations reveals Ge as a candidate element for replacing Pb in halide perovskite compounds suitable for light harvesting. Experimentally, three AGeI3 (A = Cs, CH3NH3 or HC(NH2)2) halide perovskite materials have been synthesized. These compounds are stable up to 150 °C, and have bandgaps correlated with the A-site cation size. CsGeI3-based solar cells display higher photocurrents, of about 6 mA cm-2, but are limited by poor film forming abilities and oxidising tendencies. The present results demonstrate the utility of combining computational screening and experimental efforts to develop lead-free halide perovskite compounds for photovoltaic applications.

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Lead-free germanium iodide perovskite materials for photovoltaic applications

Abstract

Bibliographical note

ASJC Scopus Subject Areas

UN SDGs

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