Performance improvement of blue perovskite quantum dots light-emitting diodes via doping

Zihan Zhao; Fan Fang; Chengjun Liu; Qianqian Huang; Jing Chen; Wei Lei

doi:10.1117/12.2638752

29 April 2022 Performance improvement of blue perovskite quantum dots light-emitting diodes via doping

Zihan Zhao, Fan Fang, Chengjun Liu, Qianqian Huang, Jing Chen, Wei Lei

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122550J (2022) https://doi.org/10.1117/12.2638752
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

All-inorganic perovskite quantum dots (PeQDs) have gained much attention in the field of wide-color-gamut display application. In recent years, green and red perovskite quantum dot light-emitting diodes (PeQDLEDs) have achieved great improvement of efficiency. However, the performance of the blue PeQDLEDs still struggle to keep pace with that of green and red counterparts, mainly due to the low photoluminance quantum yield (PLQY) of blue PeQDs. Herein, we report a strategy of doping Mn²⁺ into CsPbBr_xCl_3-x PeQDs to remove the defects, leading to the fourfold improvement of the PLQY. Benefiting from the highly luminous Mn²⁺-doped PeQDs, the PeQDLED shows the maximum EQE of 1.3% and the corresponding electroluminance (EL) is located at 468 nm. Our work would open the door to achieve highly efficient blue PeQDLEDs.

Citation Download Citation

Zihan Zhao, Fan Fang, Chengjun Liu, Qianqian Huang, Jing Chen, and Wei Lei "Performance improvement of blue perovskite quantum dots light-emitting diodes via doping", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122550J (29 April 2022); https://doi.org/10.1117/12.2638752

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KEYWORDS

Manganese

Doping

Perovskite

External quantum efficiency

Quantum dots

Electroluminescence

Transmission electron microscopy

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