Graphene oxide hole injection layer for high-efficiency polymer light-emitting diodes by using electrophoretic deposition and electrical reduction |
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| Affiliation: | 1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan;2. Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;3. Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Institute of Materials Physical Chemistry, Huaqiao University, China;4. The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan;5. Department of Materials Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292, Japan;6. Sunmoon University, 100, GalSan-Ri, TangJung-Myon, Asan, ChungNam 336-708, Republic of Korea;1. Centre of Chemistry, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal;2. Centre of Physics, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal;1. Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, SP, Brazil;2. Inst. of Chemistry – São Paulo State University- UNESP, 14801-970 Araraquara, SP, Brazil;3. Department of Morphology, Dental School at Araraquara, Univ. Estadual Paulista – UNESP, Araraquara, SP, Brazil;1. School of Physical Science and Technology, Southwest University, Chongqing 400715, People''s Republic of China;2. College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, People''s Republic of China;1. Department of Materials Science and Engineering, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul 136-713, South Korea;2. Department of Material Science and Engineering and the Center for Organic Light Emitting Diodes, Seoul National University, 599, Gwanangno, Gwanak-gu, Seoul 151-744, South Korea;1. Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, BC V8W 3V6, Canada;2. Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada |
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| Abstract: | Graphene oxide (GO) is a fascinating nanomaterial with tremendous potential for electronic devices which show high performance when the properties of GO are properly tuned like reduced graphene oxide (RGO). Here, we report a simple, cost effective and precisely controllable methods to fabricate high-quality RGO films as a hole injection layer (HIL) for high efficiency polymer light-emitting diodes (PLEDs). First, GO is electrophoretically deposited and electrically reduced to produce RGO films. The deposition and reduction of films are electrical methods; hence the thickness and the degree of reduction for GO films can be easily manipulated by controlling electrical parameters and time. The performance of PLEDs with RGO film as HIL is measured and compared with GO and (poly(3,4-ethylenedioxythiophene)polystyrene sulfonate) (AI4083), and shows better results for luminance and current density. The optimized maximum luminance and current efficiency of the PLEDs with RGO as HIL are found to be 12830 cd/m2 and 3.35 cd/A, respectively. |
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