Calcium-tributylphosphine oxide passivation enables the efficiency of pure-blue perovskite light-emitting diode up to 3.3％

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（14）
• 页码范围: 1150-1153
• 页数: 4页
• 语种: 英文

摘要

Metal halide perovskites are attractive for light-emitting diodes due to their superior optoelectronic properties such as tunable bandgaps,high photoluminescence quantum yields (PLQYs),high color purities and solution processability [1-6].In the past several years,impressive progress has been made in perovskite light-emitting diodes (PeLEDs) via microstructure engineering [7],charge balancing [8],surface defect passivation [9,10],metal ion doping [11,12] and dimensional engineering [13].As such,the green,red and near-infrared PeLEDs have achieved impressive external quantum efficiencies (EQEs) exceeding 20％ [7,8,14,15].However,the performances of pure-blue PeLEDs,i.e.,brightness and EQEs,still lag largely behind those of the green and red counterparts,which severely impedes the PeLED application in full-color display and solid-state lighting.