Influence of the selenium-vapor flow-rate in the photovoltaic properties of Cu(In, Ga)Se2 thin films prepared via a solution coating process
| Autor: | Chung-Hsin Lu, Jen-Cheng Sung |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
inorganic chemicals
Materials science chemistry.chemical_element 02 engineering and technology engineering.material 01 natural sciences law.invention Crystallinity Coating law 0103 physical sciences Solar cell Electrical and Electronic Engineering Thin film Gallium 010302 applied physics food and beverages 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Volumetric flow rate Grain growth Chemical engineering chemistry engineering 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 27:10497-10503 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-016-5139-4 |
| Popis: | The influence of selenium-vapor flow-rates in the microstructure and photovoltaic characteristics of Cu(In, Ga)Se2 films prepared using a solution coating process was investigated in this study. An increase in the flow rate of selenium vapor was shown to promote selenization reaction and the grain growth of Cu(In, Ga)Se2 films. As the selenium-vapor flow-rate was increased to 70 sccm, the crystallinity of the obtained films was significantly improved and the densified Cu(In, Ga)Se2 films were formed. Furthermore, the elevated gallium grading profile enhanced the effects of back surface field. Increasing the flow rate of selenium vapor to 70 sccm led to an increase in the Voc, Jsc, and FF values, and therefore enhanced the conversion efficiency of the resulting Cu(In, Ga)Se2 solar cell to 10.21 %. When the selenium-vapor flow-rate reached 90 sccm, the solar cell performance was deteriorated because the microstructure of Cu(In, Ga)Se2 films became porous. The present investigation reveals that the selenium-vapor flow-rate is crucial to improve the photovoltaic properties of Cu(In, Ga)Se2 solar cells. |
| Databáze: | OpenAIRE |
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