Photoelectric properties of Cu2ZnSnS4thin films deposited by thermal evaporation
| Autor: | Jia Hongjie, Wu Xinkun, Lai Yunfeng, Cheng Shu-ying, Liu Wei |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Soda-lime glass
Materials science business.industry Analytical chemistry Condensed Matter Physics Evaporation (deposition) Electronic Optical and Magnetic Materials chemistry.chemical_compound Optics chemistry Electrical resistivity and conductivity Materials Chemistry Direct and indirect band gaps CZTS Electrical and Electronic Engineering Thin film Spectroscopy business Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Semiconductors. 33:022002 |
| ISSN: | 1674-4926 |
| DOI: | 10.1088/1674-4926/33/2/022002 |
| Popis: | Sn/Cu/ZnS precursor were deposited by evaporation on soda lime glass at room temperature, and then polycrystalline thin films of Cu2ZnSnS4 (CZTS) were produced by sulfurizing the precursors in a sulfur atmosphere at a temperature of 550 °C for 3 h Fabricated CZTS thin films were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, ultraviolet-visible-near infrared spectrophotometry, the Hall effect system, and 3D optical microscopy. The experimental results show that, when the ratios of [Cu]/([Zn] + [Sn]) and [Zn]/[Sn] in the CZTS are 0.83 and 1.15, the CZTS thin films possess an absorption coefficient of larger than 4.0 × 104 cm−1 in the energy range 1.5–3.5 eV, and a direct band gap of about 1.47 eV. The carrier concentration, resistivity and mobility of the CZTS film are 6.98 × 1016 cm−3, 6.96 Ωcm, and 12.9 cm2/(Vs), respectively and the conduction type is p-type. Therefore, the CZTS thin films are suitable for absorption layers of solar cells. |
| Databáze: | OpenAIRE |
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