| 학회 | 한국화학공학회 |
| 학술대회 | 2013년 가을 (10/23 ~ 10/25, 대구 EXCO) |
| 권호 | 19권 2호, p.1968 |
| 발표분야 | 재료 |
| 제목 | Lead Chalcogenide Quantum Dots Solar Cells: Toward Efficient Charge Collection |
| 초록 | Band gap tunability and multiple exciton generation(MEG) of quantum dots make them promising material for various electronic applications. MEG, more than 1 exciton generation per 1 photon, is more efficient in quantum dots than the bulk due to discrete energy levels of quantum dots1. By achieving MEG in solar cells, we can obtain high performance solar cells exceeding Shockley-Queisser limit2. Lead chalcogenide quantum dot is one of the most promising quantum dot to achieve MEG due to its large exciton Bohr radius, which leads to highly confined energy structures3. In this study, we fabricate lead chalcogenide quantum dot depleted heterojunction solar cells. By the surface treatment of quantum dots with 1,2-ethandithiol(EDT) and hydrazine, we can enhance charge transfer and collection. Finally, we achieved high photocurrent level nearly 20 mA/cm2 with the lead chalcogednide quantum dots having band gap of 0.8 eV (1) M. C. Beard et al., Nano Lett. 2010, 10, 3019 (2) O. E. Semonin et al., Science 2011, 334, 1530 (3) R. J. Ellingson et al., Nano Lett. 2005, 5, 865 |
| 저자 | 우주영1, 송정훈1, 이도창2, 정소희3 |
| 소속 | 1한국과학기술원 / 한국기계(연), 2한국과학기술원, 3한국기계(연) |
| 키워드 | quantum dot; solar cell; MEG; lead chacogenide |
| 원문파일 | 초록 보기 |
