期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 21, 页码 7200-7210出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc00330a
关键词
-
资金
- JSPS KAKENHI from JSPS [17H03131]
- Center of Innovations (COI) Program from Japan Science and Technology Agency (JST)
Although organic light emitting devices (OLEDs) based on thermally activated delayed fluorescence (TADF) have already achieved impressively high external quantum efficiency (eta(ext)) of over 35%, their operation lifetime still needs to be improved for practical applications. In this study, we developed a molecular design for fabricating high triplet energy (E-T = 2.7 eV) multifunctional hole-transport layers (HTLs) based on a hexaphenylbenzene skeleton to realize record-breaking efficient and stable TADF OLEDs. By using a dibenzofuran-end-capped HTL named 4DBFHPB, we could successfully develop a highly efficient, low-drive voltage, and stable green TADF OLED exhibiting an eta(ext) of 19.2% and operation lifetime (LT50) of similar to 24 000 h at an initial luminance of 1000 cd m(-2). The drive voltage at 1000 cd m(-2) was recorded to be 4.07 V. We also developed a sky-blue TADF OLED exhibiting an eta(ext) of 21.5% and LT50 of similar to 1700 h at an initial luminance of 500 cd m(-2). The developed designs demonstrate record-breaking performances among the existing TADF OLEDs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据