Wide range tuning of band gap energy of A3B2X9 perovskite-like halides. (June 2019)

• Record Type: Journal Article
• Authors: Kim, Se-Yun; Yun, Yeonghun; Shin, Seunghak; Lee, Joon Hyung; Heo, Young-Woo; Lee, Sangwook
• Is Part Of: Scripta materialia. Number 166(2019)
• Page Start: 107
• Page End: 111
• Publication Date: 2019-06
• Subjects: Hybrid perovskite -- Substitution -- Band gap -- Crystal structure -- Electrical property; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.03.009
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report the structural, optical, and electrical properties of A3 B2 X9 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. Graphical abstract: Unlabelled Image