| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Tunable Electrical Properties of Doped Non-oxidized Graphene using Alkali Metal Chloride |
| 초록 |
To modulate the sheet resistance and the work function of graphene as HTL, the surface doping is versatile while retaining high transparency. In this work, we used a chemical doping method to control the charge carrier density, band gap and work function of graphene with minimizing the damage of carbon network, for which metal chlorides (NaCl, KCl and AuCl3) were used as chemical dopants. The non-oxidized graphene flakes were synthesized with large lateral sizes of more than 5 μm using ternary graphite intercalation compounds. Interestingly, the AuCl3 doped graphene flake film with a film thickness of about 20 nm showed the lowest reported sheet resistance of ~249 Ω/sq with ~75% transmittance. Furthermore, it could be controlled the work function from 4.32 eV to 5.1 eV. The interfacial dipole complexes of metal cations with low work function and the reactive radicals like –OH were discussed to explain this result. For the practical application, an organic photovoltaic device (OPV) using AuCl3 doped graphene flake film as HTL was fabricated and it demonstrated an enhanced power conversion efficiency while maintaining high optical transparency in visible light. |
| 저자 |
Sung Gyeong Jung1, Hyun Jun Kim2, Byoung Min Ko3, Sung Ho Song4, Dongju Lee1, Kwang Young Jeong2
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| 소속 |
1Division of Advanced Materials Engineering, 2Kongju National Univ., 3Chungnam, 4Republic of Korea |
| 키워드 |
Graphene; chemical doping; electrical conductivity; work function; transparent electrode
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| E-Mail |
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