Templated Bipolar Host Materials for Blue Phosphorescent Organic Light-Emitting Devices with Negligible Efficiency Roll-Offs
Hong Huang, Tao Hua, Nengquan Li, Youming Zhang, Manli Huang, Xiaolu Zhou, Shaoqing Zhuang, Guohua Xie · 2025
Read Templated Bipolar Host Materials for Blue Phosphorescent Organic Light-Emitting Devices with Negligible Efficiency Roll-Offs by Hong Huang, Tao Hua, Nengquan Li, Youming Zhang, Manli Huang, Xiaolu Zhou, Shaoqing Zhuang, Guohua Xie (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12786962.txt.
Description
Hong Huang and co-authors design host materials that keep blue light devices bright without fading at high power in this 2025 paper. In organic light-emitting devices the glow comes from a guest molecule scattered in a host. Blue remains the hardest color, and efficiency usually sags as brightness climbs, a flaw called roll-off.
The team modified a standard host by grafting on electron-pulling groups, making two hosts that carry both charge types in balance. Both showed high triplet energy and better heat tolerance. Paired with a common blue emitter, the better host reached an external quantum efficiency of 14.4 percent. At a bright five thousand units it still held 14.1 percent, a barely visible drop. The authors present the templated design as a fix for roll-off in blue devices.
Catalog record
| CREATOR | Hong Huang, Tao Hua, Nengquan Li, Youming Zhang, Manli Huang, Xiaolu Zhou, Shaoqing Zhuang, Guohua Xie |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 18 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |