Tailoring optoelectronic properties of earth abundant ZnSnN2 by combinatorial RF magnetron sputtering
| Autor: | Shyju Thankaraj Salammal, Karthik Kumar Chinnakutti, Vengatesh Panneerselvam |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Band gap Mechanical Engineering Metals and Alloys 02 engineering and technology Substrate (electronics) Sputter deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Semiconductor Mechanics of Materials Cavity magnetron Materials Chemistry Optoelectronics Direct and indirect band gaps Thin film 0210 nano-technology business Layer (electronics) |
| Zdroj: | Journal of Alloys and Compounds. 772:348-358 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.08.331 |
| Popis: | Zn-IV-N2 semiconductors are often considered as imminent materials alternative to InGaN and requisite thin film photovoltaic absorber materials for light harvesting due to its direct band gap, steep absorption onset and disorder-driven band gap tenability. In view of this, ZnSnN2 thin films were successfully prepared by reactive RF magnetron co-sputtering with different Sn concentrations at 450 °C substrate temperature. The films grown at 450 °C with different Sn target power were found to be orthorhombic crystal structure which has higher grain size (13–28 nm), low carrier density (−4.99 × 1018 to −7.01 × 1017 cm−3) and the maximum mobility (11.1 to 15.5 cm2 V−1 s−1). The phase purity and chemical bonding states of ZnSnN2 were investigated by XPS analysis. Vibrational modes of ZnSnN2 confirmed the presence of N-bonding with Zn and Sn. The optical band gap decreased from 1.96 to 1.77 eV as the Sn power increased. Hence, it is suggested that ZnSnN2 thin film grown under this technique could be utilized as efficient absorber layer in thin film solar cells due to the astonishing optical and electrical properties. |
| Databáze: | OpenAIRE |
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