화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.27, No.2, 683-687, February, 2010
DOI10.1007/s11814-010-0059-0  Export Citation
Enhanced efficiency of white polymer light-emitting diodes with inorganic nanodots
Xun Zhu1, Dong-Hyun Lee1, Heeyeop Chae1, and Sung Min Cho1, 2, †
  • 1School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
  • 2Advanced Materials and Process Research Center for IT, Sungkyunkwan University, Suwon 440-746, Korea
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Enhanced efficiency of white polymer light-emitting diodes (PLEDs) was observed by incorporating polysilicic acid (PSA) nanodots into the hole-injection layer (HIL). The PLEDs employed three different phosphorescent dyes in a single emissive layer with a host polymer of poly(vinylcarbazole) (PVK). The optimal composition of the phosphorescent dyes has been found to accomplish the white emission. By incorporating 1.5 wt% of PSA nanodots into the HIL, the maximum efficiency has been found to increase about 65%, from 13.7 cd/A to 22.9 cd/A. This remarkable improvement in efficiency may be attributed to the introduction of the PSA nanodots, which leads to the better carrier balance in the PLEDs.
Keywords:PLEDs;Efficiency;Polysilicic Acid;Nanodots;Carrier Balance
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