Abstract
Lead halide perovskite materials have shown excellent optoelectronic as well as photovoltaic properties. However, the presence of lead and the chemical instability relegate lead halide perovskites to research applications only. Here, we investigate an emerging lead-free and air stable compound (CH3NH3)3Bi2I9 as a non-toxic potential alternative to lead halide perovskites. We have synthesized thin films, powders and millimeter-scale single crystals of (CH3NH3)3Bi2I9 and investigated their structural and optoelectronic properties. We demonstrate that the degree of crystallinity strongly affects the optoelectronic properties of the material, resulting in significantly different band gaps in polycrystalline thin films and single crystals. Surface photovoltage spectroscopy reveals outstanding photocharge generation in the visible (
| Original language | English (US) |
|---|---|
| Pages (from-to) | 12504-12515 |
| Number of pages | 12 |
| Journal | J. Mater. Chem. A |
| Volume | 4 |
| Issue number | 32 |
| DOIs | |
| State | Published - 2016 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01
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CCDC 1483450: Experimental Crystal Structure Determination : tris(methylammonium) tris(mu-iodo)-hexakis(iodo)-di-bismuth
Abulikemu, M. (Creator), Ould-Chikh, S. (Creator), Miao, X. (Creator), Alarousu, E. (Creator), Banavoth, M. (Creator), Ngongang Ndjawa, G. O. (Creator), Barbe, J. (Creator), El Labban, A. (Creator), Amassian, A. (Creator) & Del Gobbo, S. (Creator), Cambridge Crystallographic Data Centre, Aug 5 2016
DOI: 10.5517/ccdc.csd.cc1lsn78, http://hdl.handle.net/10754/624591
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