题目： | Pure Hydrocarbon Hosts for 100% Exciton Harvesting in Both Phosphorescent and Fluorescent Light-Emitting Devices |
作者： | Lin-Song Cui, Yue-Min Xie, Ya-Kun Wang, Cheng Zhong, Ya-Li Deng, Xiang-Yang Liu, Zuo-Quan Jiang,* and Liang-Sheng Liao* |
单位： | Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 , P. R. China |
摘要： | Organic light-emitting diodes (OLEDs) have been widely touted as next-generation displays and solid-state lighting technologies because of their superior characteristics. However, efficiency and lifetime are still considered to restrict their commercialization. The design of materials used in OLEDs is critical to device performance. At first, fluorescent materials were used as emitting materials of OLEDs, but the intrinsic low internal quantum efficiency (IQE) of 25% limited their application in OLEDs. Thanks to theoretical breakthrough, the rest of 3/4 triplet excitons can be harnessed in emission by either the direct transition from T1 state to S0 state (phosphorescence), or the up conversion process from T1 state to S1 state then decay to S0 state (delayed fluorescence). Hybridized local and charge transfer (HLCT) have also been proposed recently for realizing 100% IQE in OLED. Now, much higher external quantum efficiency (EQE) over 20% can be achievable in the second-generation phosphorescent device and third-generation thermally activated delayed fluorescence (TADF) device. |
影响因子： | 15.049 |
分区情况： | 1区 |
链接： | http://onlinelibrary.wiley.com/doi/10.1002/adma.201501376/full 责任编辑：向丹婷 |