Anion-Exchange Blue Perovskite Quantum Dots for Efficient Light-Emitting Devices

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 CsPbCl(x)Br(3−x) PQDs dispersed in n-o...

Descripción completa

Detalles Bibliográficos
Autores principales: Hung, Wei-Kuan, Tseng, Yi-Hsun, Lin, Chun-Cheng, Chen, Sih-An, Hsu, Chih-Hung, Li, Chen-Feng, Chen, Yen-Ju, Tseng, Zong-Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9693500/
https://www.ncbi.nlm.nih.gov/pubmed/36432243
http://dx.doi.org/10.3390/nano12223957
Descripción
Sumario: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 CsPbCl(x)Br(3−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/cm(2). This work aims to provide a simple method to prepare blue-emitting PQDs and high-performance PQD-based light-emitting devices.

Ejemplares similares