Negative differential resistance and hysteresis in graphene-based organic light-emitting devices
| Autor: | Shufen Chen, Laiyuan Wang, Hong-Bo Sun, Bo Hu, Guangqin Qi, Jing Feng, Minghao Wang, Xiaogang Liu, Mingdong Yi, Lingling Deng, Lihui Liu, Hongtao Yu, Yuejiao Liu, Qi Kang, Wei Huang, Wenjuan Shang, Shuai Zhang, Wenjing Yang, Yanwen Ma, Sanyang Han, Qin Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Graphene Annealing (metallurgy) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Materials Chemistry OLED Optoelectronics Methyl methacrylate 0210 nano-technology business Luminous efficacy |
| Zdroj: | Journal of Materials Chemistry C. 6:1926-1932 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c7tc05148d |
| Popis: | Here, we report the experimental observation of negative differential resistance (NDR) and hysteresis phenomena in graphene-based OLEDs and their effects on device performance. Our results reveal that the NDR and hysteresis mainly originate from the poly(methyl methacrylate) residue resting on graphene. We further demonstrate that current annealing is a facile and effective technique to remove the polymeric residue and eliminate the NDR, leading to the dramatically enhanced luminous efficiency from 30.9 to 41.6 cd A−1, and to 89.2 cd A−1 when equipped with a high index half-ball lens. The demonstrated pretreatment process of graphene establishes a new path for the construction of a wide variety of high performance optoelectronic devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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