| 학회 | 한국공업화학회 |
| 학술대회 | 2014년 가을 (11/12 ~ 11/14, 엑스코(대구)) |
| 권호 | 18권 2호 |
| 발표분야 | 에너지저장변환-포스터 |
| 제목 | Formation mechanism of Cu2ZnSn(S,Se)4 absorber layers during selenization of stack precursor |
| 초록 | The technological advance of CZTS via evaporation process and Cu2ZnSnSe4 (CZTSe) solar cells have reached efficiencies up to 8.4 % and 10.1 %, respectively. Cu2ZnSn(S,Se)4 (CZTSSe), also commonly referred to as kesterites, is of particular interest due to the achievement of 11.1 % efficiency using a non-vacuum, hydrazine based deposition process. These research results demonstrate CZTS based solar cells are currently the most promising materials to replace the Cu(InGa)Se2 absorbers in photovoltaic devices. Almost all of the aforementioned deposition techniques involve two steps. First, metal containing precursors with or without chalcogen addition are deposited, and second, the precursors are annealed under optimized conditions in a sulfur/selenium containing atmosphere to yield the final kesterite phase. In this respect, the knowledge of the formation and conversion reactions that occur during the annealing step is essential for obtaining phase-pure CZTS(Se) absorbers with targeted metal ratios. The reaction paths during selenization depend on annealing conditions and on the initial precursor, which can be either a stack of Cu, Zn, and Sn containing layers or a homogeneous mixture of all metals with or without chalcogen elements. This study presents a detailed insight into the phase formation processes of CZTSSe during the selenization of metal compound precursors. Several complementary characterization techniques are employed to identify intermediate phases. We also investigate the influence of annealing condition on CZTSSe film properties and solar cell performance, keeping the selenization process the same for all samples |
| 저자 | 손대호1, 김영일2, 김대환2, 심준형2, 김정식2, 박시내2, 양기정2, 강진규2 |
| 소속 | 1대구경북과학기술원, 2대구경북 |
| 키워드 | CZTS; CZTSSe; solar cell |
