Li Jiong, Duan Chenghao, Wen Qiaoyun, Yuan Ligang, Zou Shibing, Chen Chang, Xie Weiguang, Lin Dongxu, Chan Christopher C S, Wong Kam Sing, Yan Keyou
School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, 510000, P. R. China.
Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong, 510632, P. R. China.
Small. 2022 May;18(18):e2107145. doi: 10.1002/smll.202107145. Epub 2022 Apr 3.
Integrating highly efficient photovoltaic (PV) function into light-emitting diodes (LEDs) for multifunctional display is of great significance for compact low-power electronics, but it remains challenging. Herein, it is demonstrated that solution engineered perovskite nanocrystals (PNCs, ≈100 nm) enable efficient electroluminescence (EL) and PV performance within a single device through tailoring the dispersity and interface. It delivers the maximum brightness of 490 W sr m at 2.7 V and 23.2% EL external quantum efficiency, a record value for near-infrared perovskite LED, as well as 15.23% PV efficiency, among the highest value for nanocrystal perovskite solar cells. The PV-EL performance is well in line with the reciprocity relation. These all-solution-processed PV-LED devices open up viable routes to a variety of advanced applications, from touchless interactive screens to energy harvesting displays and data communication.
将高效光伏（PV）功能集成到发光二极管（LED）中以实现多功能显示，对于紧凑的低功耗电子设备具有重要意义，但仍然具有挑战性。在此，通过调整分散性和界面，证明了溶液工程化的钙钛矿纳米晶体（PNCs，≈100nm）能够在单个器件中实现高效电致发光（EL）和PV性能。它在2.7V时提供490W sr m的最大亮度和23.2%的EL外量子效率，这是近红外钙钛矿LED的记录值，以及15.23%的PV效率，是纳米晶体钙钛矿太阳能电池的最高值之一。PV-EL性能与互易关系良好吻合。这些全溶液处理的PV-LED器件为从非接触式交互式屏幕到能量收集显示器和数据通信等各种先进应用开辟了可行的途径。
