| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Efficient inverted polymer light-emitting diodes using n-type doped graphene cathodes |
| 초록 |
Conventional transparent conducting oxide (e.g. indium-tin oxide (ITO)) should be replaced for flexible electronic applications due to its brittleness. Graphene is one of the excellent candidates for its outstanding electrical, mechanical and optical properties. To apply graphene as a cathode in polymer light-emitting diodes (PLEDs), work function (WF) should be reduced for efficient electron injection. We demonstrated inverted PLED with n-type doped graphene doping using hydrazine and (4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine (N-DMBI). Hydrazine and N-DMBI doped graphene showed reduced WF compared to pristine graphene. WF reduction was larger in N-DMBI doped graphene than that of hydrazine doped graphene. (WF decrease of N-DMBI doped graphene: 0.45 eV, WF decrease of hydrazine doped graphene: 0.17 eV) Inverted PLEDs with n-type doped graphene cathode showed improved luminous characteristics. Especially, inverted PLEDs with N-DMBI doped graphene showed even higher luminous efficiency than that with ITO cathode. This results implies that N-DMBI doped graphene is promising cathode in organic-optoelectronics. |
| 저자 |
이태우, 서홍규, 김호범, 김영훈, 한태희, 권성주
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| 소속 |
포항공과대 |
| 키워드 |
graphene; n-type doping; work function; polymer light-emitting diodes
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| E-Mail |
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