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Title: Lead-free germanium iodide perovskite materials for photovoltaic applications
Authors: Krishnamoorthy, Thirumal
Ding, Hong
Yan, Chen
Leong, Wei Lin
Baikie, Tom
Zhang, Ziyi
Sherburne, Matthew
Li, Shuzhou
Asta, Mark
Mathews, Nripan
Mhaisalkar, Subodh Gautam
Keywords: Engineering::Materials
Issue Date: 2015
Source: Krishnamoorthy, T., Ding, H., Yan, C., Leong, W. L., Baikie, T., Zhang, Z., . . . Mhaisalkar, S. G. (2015). Lead-free germanium iodide perovskite materials for photovoltaic applications. Journal of Materials Chemistry A, 3(47), 23829-23832. doi:10.1039/C5TA05741H
Journal: Journal of Materials Chemistry A
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.
ISSN: 2050-7488
DOI: 10.1039/C5TA05741H
Schools: School of Electrical and Electronic Engineering 
School of Materials Science and Engineering 
Organisations: Institute of Materials Research and Engineering (IMRE), A*STAR
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2015 The Royal Society of Chemistry. All rights reserved. This paper was published in Journal of Materials Chemistry A and is made available with permission of The Royal Society of Chemistry.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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