| 학회 |
한국고분자학회 |
| 학술대회 |
2016년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
41권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
High Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers |
| 초록 |
The optoelectronic tunability offered by colloidal quantum dots (CQDs) is attractive for photovoltaic applications but demands proper band alignment at electrodes for efficient charge extraction at minimal cost to voltage. We report robust self-assembled mono-layers (R-SAMs) that enable us to increase the efficiency of CQD photovoltaics. Only by developing a process for secure anchoring of aromatic SAMs, aided by deposition of the SAMs in a water-free deposition environment, were we able to provide an interface modification that was robust against the ensuing chemical treatments needed in the fabrication of CQD solids. The energy alignment at the rectifying interface was tailored by tuning the R-SAM for optimal alignment relative to the CQD quantum-confined electron energy levels. This resulted in a CQD PV record power conversion efficiency (PCE) of 10.7% with enhanced reproducibility relative to controls. |
| 저자 |
김기환1, F. Pelayo García de Arquer2, 윤영진3, Xinzheng Lan2, Mengxia Liu2, Oleksandr Voznyy2, Zhenyu Yang2, Fengjia Fan2, Alexander H. Ip2, Pongsakorn Kanjanaboos2, Sjoerd Hoogland2, 김진영3, Edward H. Sargent2
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| 소속 |
1울산과학기술대, 2Univ. of Toronto, 3UNIST |
| 키워드 |
Quantum Dot Solar Cells; high performance; R-SAM; robust; interface; dipole moment.
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| E-Mail |
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