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
- Author(s)
- Kim, Se-Yun ; Yun, Yeonghun ; Shin, Seunghak ; Lee, Joon Hyung ; Heo, Young-Woo ; Lee, Sangwook
- Issued Date
- 2019-06
- Type
- Article
- Article Type
- Article
- Author Keywords
- Hybrid perovskite ; Substitution ; Band gap ; Crystal structure ; Electrical property
- Keywords
- LEAD-FREE ; SINGLE-CRYSTALS ; EFFICIENCY ; PHASE ; LAYER ; SN ; CS3SB2I9 ; RB
- 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
- Publisher
- Elsevier BV
- Files in This Item:
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- Appears in Collections:
- ETC 1. Journal Articles
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