| 학회 |
한국고분자학회 |
| 학술대회 |
2006년 봄 (04/06 ~ 04/07, 일산킨텍스) |
| 권호 |
31권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
The use of cross-linkable electron blocking layer to improve device performances in blue polymer light-emitting diodes |
| 초록 |
High efficiency blue polymer light-emitting diodes (PLEDs) were obtained by adding an cross-linkable polymeric electron blocking layer (EBL) between a hole-transport layer (HTL) and an emitting polymer layer (EML). The devices, with configuration of indium tin oxide(ITO)/ hole-transport layer(65nm)/ EBL(10-20nm)/ EML(70nm)/ BaF2(2nm)/ Ca(50nm)/ Al(300nm), were fabricated by spin coating and thermal evaporation. In this device structure, the EBL containing cross-linkable molecules shows a strong solvent resistance, mechanically robust and impervious to spin coating of next emitting polymer layer. In addition, it has a relatively higher band gap, especially lowest-unoccupied molecular orbital (LUMO) level, than the EML. Therefore, the devices with an EBL exhibit a higher luminescence and current efficiency than those without an EBL because the EBL have two functions which are blocking electrons and preventing severe quenching by PEDT:PSS. |
| 저자 |
이성열1, 박준영2, 김연수2, 류이열3, 차국헌1, 이수형2
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| 소속 |
1서울대, 2KIST 광전자재료연구센터, 3삼성종합기술원 |
| 키워드 |
organic light-emitting diodes; electron blocking layer; cross-link |
| E-Mail |
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