期刊
CHEMISTRY OF MATERIALS
卷 28, 期 10, 页码 3308-3317出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b00176
关键词
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资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy [20124010203180]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2015R1A2A2A01006856]
In the development of low-cost, efficient, and environmentally friendly thin-film solar cells (TFSCs), the search continues for a suitable inorganic colloidal nanocrystal (NC) ink that can be easily used in scalable coating/printing processes. In this work, we first report on the colloidal synthesis of pure wurtzite (WZ) Cu2SnS3 (CTS) NCs using a polyol-mediated hot injection route, which is a nontoxic synthesis method. The synthesized material exhibits a random distribution of CTS nanoflakes with an average lateral dimension of similar to 94 +/- 15 nm. We also demonstrate that CTS NC ink can be used to fabricate low-cost and environmentally friendly TFSCs through an ethanol-based ink process. The annealing of as-deposited CTS films was performed under different S vapor pressures in a graphite box (volume; 12.3 cm(3)), at 580 degrees C for 10 min using a rapid thermal annealing (RTA) process. A comparative study on the performances of the solar cells with CTS absorber layers annealed under different S vapor pressures was conducted. The device derived from the CTS absorber annealed at 350 Torr of S vapor pressure showed the best conversion efficiency 2.77%, which is the first notable efficiency for an CTS NCs ink-based TFSC. In addition, CTS TFSC's performance degraded only slightly after 50 days in air atmosphere and under damp heating at 90 degrees C for 50 h, indicating their good stability. These results confirm that WZ CTS NCs may be very attractive and interesting light-absorbing materials for fabricating efficient solar-harvesting devices.
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