Characterization of CdS sputtering deposition on low temperature pulsed electron deposition Cu(In,Ga)Se2 solar cells
| Autor: | Ivan Colantoni, Fabio De Matteis, Federico Micciulla, Ivan Davoli, Massimiliano Lucci, Salvatore Macis, Alberto Clozza, Marco Miliucci |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Band gap 02 engineering and technology 01 natural sciences law.invention law Sputtering 0103 physical sciences Solar cell Materials Chemistry Thin film 010302 applied physics Settore FIS/03 business.industry Metals and Alloys Surfaces and Interfaces Sputter deposition 021001 nanoscience & nanotechnology Copper indium gallium selenide solar cells Surfaces Coatings and Films Electronic Optical and Magnetic Materials Optoelectronics 0210 nano-technology business Layer (electronics) Chemical bath deposition |
| Zdroj: | Thin Solid Films. 697:137833 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2020.137833 |
| Popis: | The present paper reports the investigation of sputtered CdS as a buffer layer in Cu(In,Ga)Se2 (CIGS) solar cells, for a dry-low temperature all in-line production technology method. The CdS film is deposited using radio-frequency magnetron sputtering in argon atmosphere. Compared to the well-known CdS grown by chemical bath deposition, the sputtering technology is feasible for the serial manufacturing process. The morphology and optical transmittance of CdS thin films are studied, as well as the CdS/CIGS interface and the solar cell characteristic. We observe that CdS layer deposited on glass is uniform and continuous with optical transmittance above 90% in the wavelengths range corresponding to the energy gap of the absorber. Current density-voltage (J-V) curve shows an overall efficiency of 6% affected by inhomogeneity at the CIGS/CdS interface. Sputtering deposition is not able to create a homogeneous layer on the absorber irregularities due its growth process. Moreover, Auger depth profile shows oxygen contamination at the interface, due to absorber surface oxidation. Within this work, the main crucial aspects of a new solar cell production technology, as well as related solutions, are reported. |
| Databáze: | OpenAIRE |
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