Highly Efficient White‐Light Emission Triggered by Sb3+ Dopant in Indium‐Based Double Perovskites

Advanced Photonics Research

Fuming Chen¹  Henan Li²  Bo Zhou³  Yumeng Shi³  Zexiang Liu³  Shaofan Fang³  Feier Fang³  Ye Wang⁴ 

[1] Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Normal University Guangzhou 510006 P. R. China;Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 P. R. China;International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 P. R. China;Key Laboratory of Material Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou University Zhengzhou 450052 P. R. China;

关键词: aqueous-phase synthesis;    high photoluminescence quantum yield;    Sb3+-doped indium-based double perovskites;    self-trapped excitons;    tunable white-light;   

DOI  :  10.1002/adpr.202100143

来源: DOAJ

【 摘 要 】

Inorganic indium‐based halide double perovskites (DPs) are environmentally friendly alternatives to lead‐based halide perovskites in light‐emitting diodes, but commonly suffer from low quantum efficiency and harsh synthesis conditions. Herein, a large‐scale green method using water as solvent is developed for the synthesis of 3D Cs2NaInCl6 and 0D Cs2InCl5·H2O with/without Sb3+ dopant at room temperature. The transformation between Cs2InCl5·H2O and Cs2NaInCl6 products is controlled by the concentration of eco‐friendly NaCl, where excess Cl− and Na+ ions play important roles in inhibiting In3+ hydrolysis and promoting Cs2NaInCl6 crystallization, respectively. The obtained Cs2NaInCl6:Sb and Cs2InCl5·H2O:Sb exhibit highly luminescent self‐trapped exciton‐related blue (450 nm; photoluminescence quantum yield [PLQY] ≈85%) and yellow (610 nm; PLQY ≈88%) emissions, which are comparable to those obtained by previous methods. Tunable cold/warm white light with a PLQY of up to ≈73% is achieved by the rational assembly of two components with highly overlapped excitation wavelength ranges. Each component demonstrates remarkable stability against humidity and heat. This composite shows great potential in solid‐state lighting for general illumination.

【 授权许可】

Unknown