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Dual-site mixed layer-structured FAxCs3−xSb2I6Cl3 Pb-free metal halide perovskite solar cells

Authors :
Jin Hyuck Heo
Yong Kyu Choi
Ki-Ha Hong
Sang Hyuk Im
Source :
RSC Advances. 10:17724-17730
Publication Year :
2020
Publisher :
Royal Society of Chemistry (RSC), 2020.

Abstract

Structure engineering of trivalent metal halide perovskites (MHPs) such as A3Sb2X9 (A = a monovalent cation such as methyl ammonium (MA), cesium (Cs), and formamidinium (FA) and X = a halogen such as I, Br, and Cl) is of great interest because a two dimensional (2D) layer structure with direct bandgap has narrower bandgap energy than a zero dimensional (0D) dimer structure with indirect bandgap. Here, we demonstrated 2D layer structured FACs2Sb2I6Cl3 MHP by dual-site (A and X site) mixing. Thanks to the lattice-symmetry change by I–Cl mixed halide, the shortest ionic radius of Cs, and the lower solution energy due to dual-site mixing, the FACs2Sb2I6Cl3 MHP had 2D layer structure and thereby the MHP solar cells exhibited improved short-circuit current density.

Details

ISSN :
20462069
Volume :
10
Database :
OpenAIRE
Journal :
RSC Advances
Accession number :
edsair.doi...........cca68a0bce7f1ac33cd18b2ba449cb1e
Full Text :
https://doi.org/10.1039/d0ra00787k