| 학회 | 한국재료학회 |
| 학술대회 | 2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 | 21권 2호 |
| 발표분야 | G. 나노/박막 재료 |
| 제목 | Synthesis of Cu2GeS3 Nanocrystals by Mechano-Chemical Method |
| 초록 | Thin film solar cell composed of Cu(In,Ga)Se2 (CIGS) compound semiconductor recorded a high photoelectric conversion of over 20%.1 Cu2ZnSnS4 (CZTS) is very similar to the well-studied CIGS compound and has been another subject of study for thin film solar cells.2 Recently, Cu2GeS3 (CGS) and Cu2GeSe3 (CGSe) compounds, p-type semiconductors for light-absorbing materials gathers much attention since they have wide bad gap suitable for highly efficient photovoltaics. In addition, CGS compounds are composed of earth-abundant materials which makes them practical for future photovoltaics. In this presentation, we would like to deliver our recent results on CGS nano-crystal synthesis by mechanochemical method and thin film fabrication using the CGS nanocrystals. The synthetic method was found very practical allowing simplicity, and up-scalablility (~20 g) to the obtained CGS nanocrystals were thoroughly characterized by several analysis: X-ray diffraction (XRD); X-ray Photoelectron Spectroscopy (XPS); Transmission Electron Microscopy (TEM); and Raman spectroscopy. The Thin film of CGS was fabricated by the ink printing method by dispersing the as-synthesized nanocrystal in a non-toxic solvent (anhydrous ethanol) and printing by a doctor-blade method. The CGS thin film was analyzed by UV-Vis Spectroscopy. The film was found to have a band gap energy of 1.0~1.5 eV which is suitable for applying as an absorber layer for sola cells. References 1. M. A. Green. K. Emery, Y. Hishikawa, W. Warta, and E. D. Dunlop, Prog. Photovoltaics, 2012, 20, 12-20. 2. H. Katagiri, N. Sasaguchi, S. Hando, S. Hoshino, J. Ohashi and T. Yokota, Sol. Energy Mater. Sol. Cells, 1997, 49, 407–414. |
| 저자 | So-Hye Cho1, Byeong-Kwon Ju2, Seung Yong Lee1, Bo-In Park1, Hak-Young Ahn2 |
| 소속 | 1Korea Institute of Science and Technology, 2Korea Univ. |
| 키워드 | CGS; Photovoltaics; Mechanochemical; doctor-blade; thin film |
