| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 봄 (04/10 ~ 04/11, 대전 컨벤션센터) |
| 권호 |
39권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Graphene-ruthenium complex hybrid photodetectors with ultrahigh photoresponsivity |
| 초록 |
The maximum responsivity of a pure monolayer graphene-based photodetector is less than 10 mAW–1. Here, we report a graphene hybrid photodetector functionalized with a photoactive ruthenium complex that shows an ultrahigh responsivity and a photoconductive gain under incident optical intensity of the order of milliwatts. This responsivity is two orders of magnitude higher than the precedent best performance of graphene-based photodetectors under a similar incident light intensity. Upon functionalization with a 4-nm-thick ruthenium complex, monolayer graphene-based photodetectors exhibited pronounced n type doping effect due to electron transfer via the metalligand charge transfer (MLCT) from the ruthenium complex to graphene. The ultrahigh responsivity is attributed to the long lifetime and high mobility of the photoexcited charge carriers. Our approach is highly promising for improving the responsivity of graphene-based photodetectors. |
| 저자 |
이은광, Xien Liu, 오준학
|
| 소속 |
울산과학기술대 |
| 키워드 |
graphene; photoresponse; transistor; Ru compound; metal-ligand charge transfer
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| E-Mail |
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