Hydrogen bond modulation in 1,10-phenanthroline derivatives for versatile electron transport materials with high thermal stability, large electron mobility and excellent n-doping ability
| Autor: | Dongdong Zhang, Weiguo Han, Rongchuan Su, Zhengyang Bin, Diyuan Shi, Lian Duan |
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| Rok vydání: | 2020 |
| Předmět: |
Electron mobility
Multidisciplinary Fabrication Materials science business.industry Doping 010502 geochemistry & geophysics 01 natural sciences Electron transport chain Molecular engineering OLED Optoelectronics Thermal stability business Glass transition 0105 earth and related environmental sciences |
| Zdroj: | Science Bulletin. 65:153-160 |
| ISSN: | 2095-9273 |
| Popis: | 4,7-Bisphenyl-1,10-phenanthroline (BPhen) is a promising electron transport material (ETM) and has been widely used in organic light-emitting diodes (OLEDs) because of the large electron mobility and easy fabrication process. However, its low glass transition temperature would lead to poor device stability. In the past decades, various attempts have been carried out to improve its thermal stability though always be accomplished by the reduced electron mobility. Here, we present a molecular engineering to modulate the properties of BPhen, and through which, a versatile BPhen derivative (4,7-bis(naphthalene-β-yl)-1,10-phenanthroline, β-BNPhen) with high thermal stability (glass transition temperature = 111.9 °C), large electron mobility (7.8 × 10−4 cm2/(V s) under an electrical field of 4.5 × 105 V/cm) and excellent n-doping ability with an air-stable metal of Ag is developed and used as multifunctional layers to improve the efficiency and enhance the stability of OLEDs. This work elucidates the great importance of our molecular engineering methodology and device structure optimization strategy, unlocking the potential of 1,10-phenanthroline derivatives towards practical applications. |
| Databáze: | OpenAIRE |
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