期刊
DISPLAYS
卷 29, 期 5, 页码 436-439出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.displa.2008.02.006
关键词
Organic light-emitting diode; Screen printing; Phosphorescence; PVK; Ir(ppy)(3)
类别
资金
- the Korea Ministry of Commerce, Industry and Energy
- Korea Science & Engineering Foundation [R01-2006-000-10140-0]
- [2004-0693-100]
- National Research Foundation of Korea [R01-2006-000-10140-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We demonstrate the use of screen printing in the fabrication of highly efficient phosphorescent polymer organic light-emitting devices (OLEDs) based oil a green-emitting Ir(ppy)(3) and a host polymer PVK We incorporate PBD in the polymer host as an electron-transporting dopant and alpha-NPD as a hole-transporting dopant. The best screen-printed single-layer device exhibits very high peak luminous efficiency of 63 cd/A at a relatively high operating voltage of 17.1 V at the luminance of 650 cd/m(2). We observed the highest luminance of 24,000 cd/m(2) at 35 V. Due to the NO operating voltage, despite of the high peak luminous efficiency the peak power efficiency was found to be 12.2 lm/W at the luminance of 470 cd/m(2) (15.9 V). 2008 Elsevier B.V. All rights reserved.
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