Stable and high performance all-inorganic perovskite light-emitting diodes with anti-solvent treatment

Autor: Wei Lei, Abida Perveen, Qianqian Huang, Nasrud Din, Ahmad Raza, Qasim Khan, Fawad Saeed, Elias E. Elemike, Alagesan Subramanian, Sajid Hussain, Yan Sikhai
Rok vydání: 2021
Předmět:
Zdroj: Chinese Optics Letters. 19:030005
ISSN: 1671-7694
DOI: 10.3788/col202119.030005
Popis: Optoelectronic applications based on the perovskites always face challenges due to the inherent chemical composition volatility of perovskite precursors. The efficiency of perovskite-based light-emitting diodes (Pe-LEDs) can be enhanced by improving the perovskite film via solvent engineering. A dual solvent post-treatment strategy was applied to the perovskite film, which provides a synchronous effect of passivating surface imperfections and reduces exciton quenching, as evidenced by improved surface morphology and photoluminance. Thus, the optimized Pe-LEDs reach 17,866 cd·m−2 maximum brightness, 45.8 cd·A−1 current efficiency, 8.3% external quantum efficiency, and relatively low turn-on voltage of 2.0 V. Herein, we present a simple technique for the fabrication of stable and efficient Pe-LEDs.
Databáze: OpenAIRE