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.
| Original language | English |
|---|---|
| Pages (from-to) | 17724-17730 |
| Number of pages | 7 |
| Journal | RSC Advances |
| Volume | 10 |
| Issue number | 30 |
| DOIs | |
| Publication status | Published - 2020 May 6 |
Bibliographical note
Funding Information:This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2014R1A5A1009799), Nano-Material Technology Development Program (No. 2017M3A7B4041696) and the Technology Development Program to Solve Climate Change (No. 2015M1A2A2055631)) and the Ministry of Trade, Industry & Energy, Republic of Korea New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20183010013820).
Publisher Copyright:
© 2020 The Royal Society of Chemistry.
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering