CsPbBr3/CdS Core/Shell Structure Quantum Dots for Inverted Light-Emitting Diodes Application

Xiaosheng Tang; Jie Yang; Shiqi Li; Weiwei Chen; Zhiping Hu; Jing Qiu

doi:10.3389/fchem.2019.00499

CsPbBr₃/CdS Core/Shell Structure Quantum Dots for Inverted Light-Emitting Diodes Application

Front Chem. 2019 Jul 12:7:499. doi: 10.3389/fchem.2019.00499. eCollection 2019.

Authors

Xiaosheng Tang¹, Jie Yang¹, Shiqi Li¹, Weiwei Chen¹, Zhiping Hu¹, Jing Qiu¹

Affiliation

¹ Key Laboratory of Optoelectronic Technology and Systems, College of Optoelectronic Engineering, Chongqing University, Ministry of Education, Chongqing, China.

Abstract

Novel CsPbBr₃/CdS core/shell structure quantum dots (QDs) were successfully synthesized using a facile hot-injection method. The corresponding CsPbBr₃/CdS QDs based light-emitting diodes (QLEDs) were further prepared, which demonstrated the maximum luminance of 354 cd/m² and an external quantum efficiency (EQE) of 0.4% with the current efficiency (CE) of 0.3 cd/A. Moreover, the optoelectronic performance of the CsPbBr₃/CdS QDs based QLEDs exhibited a comparable enhancement in contrast to the pure CsPbBr₃ QDs based QLEDs. Hypothetically, the novel CsPbBr₃/CdS structure QDs introduced one new route for advanced light emission applications of perovskite materials.

Keywords: core/shell structure; light-emitting diode; luminescence; quantum dots; semiconductors.