| 학회 | 한국재료학회 |
| 학술대회 | 2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 | 19권 2호 |
| 발표분야 | A. 전자/반도체 재료(Electronic and Semiconductor Materials) |
| 제목 | Direct deposition of Cu2ZnSnS4 thin films by solution method for solar cell applications |
| 초록 | Thin film photovoltaic absorbers (CdTe and Cu(In,Ga)Se2) can achieve solar conversion efficiencies of up to 20% and are now commercially available, but the presence of toxic (Cd,Se) and expensive elemental components (In, Te) is a real issue as the demand for photovoltaics rapidly increases. To overcome these limitations, there has been substantial interest in developing viable alternative materials, such as Cu2ZnSnS4 (CZTS) is an emerging solar absorber that is structurally similar to CIGS, but contains only earth abundant, nontoxic elements and has a near optimal direct band gap energy of 1.4-1.6 eV and a large absorption coefficient of ∼104 cm-1. CZTS absorber has been prepared by various methods, such as thermal evaporation, sputtering, electrodeposition, sol-gel, and hydrothermal synthesis. Among them, wet-chemistry methods are of great research interest because of their low fabrication cost. However, most wet-chemistry based CZTS film formations have been based on the synthesis of CZTS particles, followed by collecting and spin-coating them on a substrate and thermal treatment. In the present work, we report an alternative aqueous chemical approach based on direct chemical bath deposition (CBD) method for large area deposition of CZTS thin films. The film formation and morphologies were critically affected by the concentration and ratio of complex agents, such as triethanolamine and ammonia. The CZTS films showed well-developed kesterite crystal structure after sulfurization treatment at 500 oC. The CZTS films were analyzed by scanning electron microscopy, X-ray diffraction, micro Raman spectroscopy, photoluminescence spectroscopy, and I-V characteristics. In addition, we will further discuss the photovoltaic solar cell properties of CdS/CZTS thin films. |
| 저자 | Vinaya Kumar Arepalli1, Nam-Kyu Park2, 김의태3 |
| 소속 | 1Department of Materials Science and Engineering, 2Chungnam National Univ., 3Daejeon |
| 키워드 | Cu2ZnSnS4; CZTS; solar cell; CBD |
