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

• 作者: Sajid Hussain Ahmad Raza Fawad Saeed Abida Perveen Yan Sikhai Nasrud Din Elias E.Elemike Qianqian Huang Alagesan Subramanian Qasim Khan Wei Lei
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Metal Halide Perovskite and Their Applications
• 页码范围: 27-31
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202119.030005

摘要

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.