| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
International Symposium on Organic Electronic and Photonic Materials (분자전자 부문위원회, 영어발표) |
| 제목 |
Solution-Processed and Multilayered Organic Light-Emitting Devices |
| 초록 |
Solution processes such as a slot die coating are considered to have an advantage of low cost over the vacuum process for manufacturing of large area OLED lighting. High efficiency of OLEDs has been achieved by multilayer heterostructures to enable balanced and efficient charge injection, transport, and blocking. However the multilayer structures from solution-process are difficult to be fabricated because of solubility of the materials in each layer. When coating of an electron transporting material onto an emitting layer, a host material and an emitting dopant have to be insoluble to the coating solvent of the upper layer. We synthesized phenylcarbazole-type host materials having high molecular weight, showing controlled solubility to organic solvents for the coating. Coating solvents of the electron transporting layer were also optimized not to dissolve the host and emitting dopant. We fabricated all-solution-processed phosphorescence OLEDs, in which only electrodes were formed in vacuum, consisting of the four layers: hole-injection layer, hole-transporting layer, emitting layer, and electron-transporting layer. Record high efficiencies of ＞ 50 lm/W at 100 cd/m2 for solution-processed blue, green and white OLEDs, respectively, were achieved without outcoupling enhancement. |
| 저자 |
Yong-Jin Pu1, Takayuki Chiba2, Naoya Aizawa1, Hisahiro Sasabe2, Junji Kido1
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| 소속 |
1Department of Organic Device Engineering, 2Yamagata Univ. |
| 키워드 |
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| E-Mail |
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