1. Anion-Exchange Blue Perovskite Quantum Dots for Efficient Light-Emitting Devices.
- Author
-
Hung, Wei-Kuan, Tseng, Yi-Hsun, Lin, Chun-Cheng, Chen, Sih-An, Hsu, Chih-Hung, Li, Chen-Feng, Chen, Yen-Ju, and Tseng, Zong-Liang
- Subjects
- *
QUANTUM dots , *ORGANIC light emitting diodes , *ELECTROLUMINESCENT devices , *PEROVSKITE , *PARTICLE size distribution , *THIN films , *SURFACE defects - Abstract
In this study, blue perovskite quantum dots (PQDs) were prepared using didodecyldimethylammonium bromide (DDAB), which can passivate surface defects caused by the loss of surface ligands and reduce particle size distribution. After the passivation of DDAB, blue CsPbClxBr3−x PQDs dispersed in n-octane produced a more compact and uniform PQD thin film than the non-passivated ones. The resulting device showed a stabile lifetime, and an EL peak of 470 nm and a maximum EQE of 1.63% were obtained at an operating voltage of 2.6 V and a current density of 0.34 mA/cm2. This work aims to provide a simple method to prepare blue-emitting PQDs and high-performance PQD-based light-emitting devices. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF