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Lead-free germanium iodide perovskite materials for photovoltaic applications
- Publication Year :
- 2015
-
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. NRF (Natl Research Foundation, S’pore) Accepted version
- Subjects :
- Materials science
Materials [Engineering]
Renewable Energy, Sustainability and the Environment
Photovoltaic Applications
Photovoltaic system
Inorganic chemistry
Halide
General Chemistry
Perovskite
chemistry.chemical_compound
Lead (geology)
chemistry
Germanium iodide
General Materials Science
Perovskite (structure)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....56c51dac3f38593a0f04d90f48d0adbc