Journal
JOURNAL OF INFORMATION DISPLAY
Volume 21, Issue 1, Pages 49-56Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15980316.2019.1680452
Keywords
Organic light-emitting diode (OLED); graphene; transparent electrode; flexible electrode; active-matrix OLED
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Funding
- Ministry of Trade, Industry, and Energy/Korea Evaluation Institute of Industrial Technology [MOTIE/KEIT 10044412]
- Electronics and Telecommunications Research Institute (ETRI) - South Korean government [19ZB1220]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10044412] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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From the very first time that graphene was used as a transparent electrode for OLED applications, the emergence of active-matrix (AM)-graphene OLED displays has been envisioned. Realizing this expectation, however, turned out to be difficult. Two obstacles are the growth and transfer of a large-area graphene film and the patterning of a graphene film into pixels. To solve these problems, a process of patterning a graphene film without surface contamination was developed. The fabrication of OLED panels by the patterned graphene anode on Gen 2(370 x 470 mm)-sized and flexible substrates was successfully demonstrated. In this work, oxide TFT arrays were combined as a switching backplane, and a pixelated graphene OLED was used as an emissive layer, to realize AM-graphene OLED displays. To explore the technical feasibility of flexible AM-graphene OLED displays, the aforementioned components were formed on a flexible substrate. For commercial-level production, all the processes that were used were chosen to be compatible with the conventional display processes.
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