Chinese Optics Letters, 2021, 19 (3): 030005, Published Online: Mar. 11, 2021
Stable and high performance all-inorganic perovskite light-emitting diodes with anti-solvent treatment
Abstract
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 maximum brightness, 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.
Sajid Hussain, Ahmad Raza, Fawad Saeed, Abida Perveen, Yan Sikhai, Nasrud Din, Elias E. Elemike, Qianqian Huang, Alagesan Subramanian, Qasim Khan, Wei Lei. Stable and high performance all-inorganic perovskite light-emitting diodes with anti-solvent treatment[J]. Chinese Optics Letters, 2021, 19(3): 030005.