Radiation-pressure-induced photoluminescence enhancement of all-inorganic perovskite CsPbBr3 quantum dots

• DOI: 10.1364/prj.7.000837
• Publication Date: 2019-07-12T19:16:18Z
• Authors: Ying Zhang; Haiou Zhu; Taiwu Huang; Zongpeng Song; Shuangchen Ruan
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Perovskite quantum dots (QDs) are of great interest due to their outstanding optoelectronic properties and tremendous application potential. Improving photoluminescence (PL) spectra in all-inorganic perovskite QDs is importance for performance enhancement. In this work, the PL yield CsPbBr3 enhanced from 70% 95% with increasing radiation pressure. Such enhancement attributed increased binding energy self-trapped excitons (STEs) upon pressure, which consistent its blue-shifted other characterization results. Furthermore, we study ultrafast absorption spectroscopy find that dynamics relaxation free STEs pressure ascribed stronger electron–phonon coupling contracted octahedral structure. It further demonstrated can boost efficiency explore effectively relationship between structure optical properties.