Highly thermal stable electron-transporting materials using triptycene derivatives for OLEDs
Autor: | Jayachandran Jayakumar, Wei-Ling Wu, Tzung-You Han, Ho-Hsiu Chou, Li-Yu Ting, Chih-Li Chang, Chun-Ming Yeh, Hsiao-Wen Hung |
---|---|
Rok vydání: | 2021 |
Předmět: |
Electron mobility
Materials science Band gap 02 engineering and technology 010402 general chemistry 01 natural sciences Biomaterials chemistry.chemical_compound Thermal Materials Chemistry OLED Thermal stability Electrical and Electronic Engineering business.industry General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Triptycene Optoelectronics Quantum efficiency 0210 nano-technology Glass transition business |
Zdroj: | Organic Electronics. 88:106013 |
ISSN: | 1566-1199 |
Popis: | Highly thermal stable two-electron transport materials (ETMs) based on the triptycene containing phenylpyridine derivatives were designed and synthesized by Suzuki-Miyaura coupling reactions efficiently. Among them, TPP shows a high triplet energy gap (ET = 2.85 eV), high glass transition temperature (Tg = 142 °C), deep HOMO level (7.0 eV) and good electron mobility. TPP performed as ETM for the green phosphorescent OLED was achieved high external quantum efficiency (EQE) compared to that of the device with TmPyPB as ETM. Moreover, thermal stability was demonstrated after thermal annealing of the device at 100 °C for 30 min, resulting in the TPP-based device reached a high EQE of 13.6% at a luminance of 100 cd m−2, while that of TmPyPB-based device have dramatically degraded under otherwise identical conditions. |
Databáze: | OpenAIRE |
Externí odkaz: |