| 학회 |
한국재료학회 |
| 학술대회 |
2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 |
23권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Long-term air-stable Au doping of graphene by hybridizing with graphene oxide for flexible transparent electrodes |
| 초록 |
In general, AuCl3 is a widely used as a dopant for improving the electrical conductivity of graphene. However, time-dependent decay of doping concentration caused by exposure of Au dopants to air has been reported by previous studies. Here, we report an optimized sequential stacking method utilizing graphene (G), graphene oxide (GO), and AuCl3 in order to maximize the effect of Au doping to achieve long-term doping stability as well as a decrease in the sheet resistance. Two types of samples with different stacking sequences were prepared carefully: (i) G/AuCl3/GO and (ii) GO/AuCl3/G. We examined the sheet resistance of the hybrid films with adjusting various concentration of AuCl3. The optimized conditions for obtaining the hybrid films with low sheet resistance were established: the sample is stacked in sequence of G/AuCl3/GO with AuCl3 concentration of 1 mg/ml. Interestingly, when sequence was altered (GO/AuCl3/G/SiO2 in this case), the sheet resistance was decreased even more. The sample also exhibited constant sheet resistance up to 30 days because the presence of GO encapsulating layers. Additionally, the optical transmittance at 550 nm wavelength of 1, 2, and 3 mg/ml Au-doped graphene was decreased only about 2% (from 96% to 94%). The sample also demonstrated high mechanical stability with small sheet resistance variance of less than 10% even after 105 cycles of repeated bending. |
| 저자 |
Sujin Lee, Yi Rang Lim, Young Bum Lee, Wooseok Song, Sung Myung, Jongsun Lim, Ki-Seok An, Sun Sook Lee
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| 소속 |
한국화학(연) |
| 키워드 |
<P>Transparent Electrode; Flexible Electrode; Graphene; Electrode Stability</P>
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| E-Mail |
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