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Wide range tuning of band gap energy of A3B2X9 perovskite-like halides

Title
Wide range tuning of band gap energy of A3B2X9 perovskite-like halides
Authors
Kim, Se-YunYun, YeonghunShin, SeunghakLee, Joon HyungHeo, Young-WooLee, Sangwook
Issue Date
2019-06
Citation
Scripta Materialia, 166, 107-111
Type
Article
Article Type
Article
Author Keywords
Hybrid perovskiteSubstitutionBand gapCrystal structureElectrical property
Keywords
LEAD-FREESINGLE-CRYSTALSEFFICIENCYPHASELAYERSNCS3SB2I9RB
ISSN
1359-6462
Abstract
We report the structural, optical, and electrical properties of A 3 B 2 X 9 halides (where A = Cs, methylammonium (MA), formamidinium (FA), or ethylammonium; B = As, Sb, or Bi; X = Cl, Br, or I). Substitution results in tuning of lattice parameters involving crystal structure change, hence tuning of band gap energy, from ~1.9 to ~3.1 eV. Our results on the band gap energy, type, and crystal structure changes by A, B and X site substitution would give very useful information to develop wide band gap light-absorbers for diverse optoelectronic applications, including highly efficient and stable tandem solar cells. © 2019
URI
http://hdl.handle.net/20.500.11750/9688
DOI
10.1016/j.scriptamat.2019.03.009
Publisher
Elsevier BV
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