题目： | Thermally Activated Delayed Fluorescence Warm White Organic Light Emitting Devices with External Quantum Efficiencies Over 30% |
作者： | Jia-Xiong Chen,1,2,3 Kai Wang,1,* Ya-Fang Xiao,2 Chen Cao,2 Ji-Hua Tan,2 Hui Wang,1 Xiao-Chun Fan,1 Jia Yu,1 Feng-Xia Geng,3 Xiao-Hong Zhang,1,* and Chun-Sing Lee2,* |
单位： | 1Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu, Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China 2Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong Hong Kong SAR (P. R. China) 3College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Soochow University, Suzhou 215123 (P. R. China) |
摘要： | While monochrome organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) emitters have achieved over 30% external quantum efficiencies (EQEs), all-TADF white OLEDs (WOLEDs) are still lagging behind.Herein, a simple system based on two color-complementary TADF emitters is exploited to realize high-performance WOLEDs. By doping a high-performance orange-red TADF fluorophor (BPPZ-DPXZ) into a blue TADF host (DBFCz-Trz), energy transfer, and triplet-to-singlet conversion in the host-dopant system can be optimized to simultaneously achieve full exciton utilization and color balance. With this design, all-TADF single-emitting-layer WOLEDs with a maximum EQE up to 32.8% are demonstrated. This high efficiency surpasses EQEs of reported WOLEDs based on both TADF as well as phosphorescence. It is expected that this finding can provide new insight for designing highly efficient all-TADF WOLEDs. |
影响因子： | 16.836 |
分区情况： | 一区 |
链接： |
责任编辑：向丹婷