Lead-free iron-doped Cs₃Bi₂Br₉ perovskite with tunable properties

Htun, Thiri1; Elattar, Amr2,3; Elbohy, Hytham4; Tsutsumi, Kosei1; Horigane, Kazumasa5; Nakano, Chiyu6; Gu, Xiaoyu7,8; Suzuki, Hiroo1; Nishikawa, Takeshi1; Kyaw, Aung Ko Ko7,8; Hayashi, Yasuhiko1

2024-07-19

10.1039/d4ra04062g

RSC ADVANCES   影响因子和分区

2046-2069

Perovskite based on cesium bismuth bromide offers a compelling, non-toxic alternative to lead-containing counterparts in optoelectronic applications. However, its widespread usage is hindered by its wide bandgap. This study investigates a significant bandgap tunability achieved by introducing Fe doping into the inorganic, lead-free, non-toxic, and stable Cs3Bi2Br9 perovskite at varying concentrations. The materials were synthesized using a facile method, with the aim of tuning the optoelectronic properties of the perovskite materials. Characterization through techniques such as X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, energy dispersive spectroscopy (EDS), and UV-vis spectroscopy was conducted to elucidate the transformation mechanism of the doping materials. The substitution process results in a significant change in the bandgap energy, transforming from the pristine Cs3Bi2Br9 with a bandgap of 2.54 eV to 1.78 eV upon 70% Fe doping. The addition of 50% Fe in Cs3Bi2Br9 leads to the formation of the orthorhombic structure in Cs-2(Bi,Fe)Br-5 perovskite, while complete Fe alloying at 100% results in the phase formation of CsFeBr4 perovskite. Our findings on regulation of bandgap energy and crystal structure through B site substitution hold significant promise for applications in optoelectronics.

SCI ; EI

英语

通讯

Chemistry

Chemistry, Multidisciplinary

WOS:001274356800001

ROYAL SOC CHEMISTRY

Web of Science

1.Okayama Univ, Grad Sch Nat Sci & Technol, Okayama, Japan
2.Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt
3.FAMU FSU Coll Engn, Ind & Mfg Engn, 2525 Pottsdamer St, Tallahassee, FL 32310 USA
4.Damietta Univ, Fac Sci, Phys Dept, Dumyat, Egypt
5.Okayama Univ, Res Inst Interdisciplinary Sci, Okayama, Japan
6.Okayama Univ, Adv Sci Res Ctr, Okayama, Japan
7.Guangdong Univ, Key Lab Adv Quantum Dot Displays & Lighting, Guangzhou, Peoples R China
8.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China

Htun, Thiri,Elattar, Amr,Elbohy, Hytham,et al. Lead-free iron-doped Cs₃Bi₂Br₉ perovskite with tunable properties[J]. RSC ADVANCES,2024,14(32).

Htun, Thiri.,Elattar, Amr.,Elbohy, Hytham.,Tsutsumi, Kosei.,Horigane, Kazumasa.,...&Hayashi, Yasuhiko.(2024).Lead-free iron-doped Cs₃Bi₂Br₉ perovskite with tunable properties.RSC ADVANCES,14(32).

Htun, Thiri,et al."Lead-free iron-doped Cs₃Bi₂Br₉ perovskite with tunable properties".RSC ADVANCES 14.32(2024).