A low-temperature formation path toward highly efficient Se-free Cu2ZnSnS4 solar cells fabricated through sputtering and sulfurization
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AbstractA novel low-temperature Cu2ZnSnS4 (CZTS) formation path using co-sputtered SnS2-ZnS-Cu precursors was employed for CZTS solar cell fabrication, which gave rise to a cell with a power conversion efficiency of 8.58%, a big step forward from the previous record of 6.77% reported by Katagiri et al. for this kind of solar cell. This method consists of a low-temperature annealing stage for CZTS phase formation followed by a short high-temperature annealing stage for grain growth and secondary phase removal. The employment of SnS2 as a precursor causes the CZTS phase to readily form at low temperature when SnS2 has not dramatically decomposed into volatile SnS. The two-stage process wisely separates the phase formation and crystal coalescence, which makes the fabrication of CZTS films more controllable. Furthermore, the demonstration of the low-temperature formation path provides new opportunities to fabricate highly efficient, cost-effective and environmentally friendly CZTS solar cells on low-weight and flexible substrates such as polyimides.
All Author(s) ListFeng Y, Lau TK, Cheng GM, Yin L, Li ZH, Luo HL, Liu Z, Lu XH, Yang CL, Xiao XD
Journal nameCrystEngComm
Volume Number18
Issue Number6
Pages1070 - 1077
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesChemistry; Chemistry, Multidisciplinary; Crystallography

Last updated on 2020-15-09 at 01:07