Study on performance improvement of pure bromide sky blue perovskite light-emitting diodes by modifying PEDOT:PSS

Jun Xiong; Xuan Zhang; Xiangqian Cui; Guangyue Chai; Wang Zhang

doi:10.1117/12.2687086

6 August 2023 Study on performance improvement of pure bromide sky blue perovskite light-emitting diodes by modifying PEDOT:PSS

Jun Xiong, Xuan Zhang, Xiangqian Cui, Guangyue Chai, Wang Zhang

Author Affiliations +

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 1278139 (2023) https://doi.org/10.1117/12.2687086
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

On account of favorable photoelectric properties, Metal Halide Perovskites (MHPs) will provide significant advantages in the next generation of optoelectronic devices, particularly in new displays. Red and green Perovskite Light-Emitting Diodes (PELEDs) devices have recently made significant advancements and essentially satisfied the requirements of the display. In comparison to red and green, blue PELEDs still have relatively low brightness and efficiency. The main reasons are the phase separation phenomenon of chlorobromide mixed halogen perovskites at high voltage, which cause spectral instability, and the poor matching between the blue PELEDs hole transport layer material and the emission layer material. In this work, we selected the all-inorganic CsPbBr₃ as the precursor solution, reduced its dimension through ligand engineering to change the color to sky blue, and then modified PEDOT: PSS to achieve a highly efficient pure bromo-based sky blue PELEDs. Finally, a high brightness of 2322cd/m² was achieved at 488 nm.

Citation Download Citation

Jun Xiong, Xuan Zhang, Xiangqian Cui, Guangyue Chai, and Wang Zhang "Study on performance improvement of pure bromide sky blue perovskite light-emitting diodes by modifying PEDOT:PSS", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 1278139 (6 August 2023); https://doi.org/10.1117/12.2687086

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KEYWORDS

Perovskite

Electroluminescence

Bromine

Quantum devices

Light emitting diodes

External quantum efficiency

Lead

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