| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000370734 |
| ISSN: | 0035-001X |
| Authors: | Sastre Hernández, J1 Calixto, M.E1 Tufiño Velázquez, M1 Contreras Puente, G1 Morales Acevedo, A2 Casados Cruz, G2 Hernández Pérez, M.A3 Albor Aguilera, M.L1 Mendoza Pérez, Rogelio4 |
| Institutions: | 1Instituto Politécnico Nacional, Escuela Superior de Física y Matemáticas, México, Distrito Federal. México 2Instituto Politécnico Nacional, Centro de Investigación y de Estudios Avanzados, México, Distrito Federal. México 3Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, México, Distrito Federal. México 4Universidad Autónoma de la Ciudad de México, México, Distrito Federal. México |
| Year: | 2011 |
| Season: | Oct |
| Volumen: | 57 |
| Number: | 5 |
| Pages: | 435-440 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Aplicado, descriptivo |
| English abstract | Polycrystalline Cu(In,Ga)Se2 (CIGS) solar cells are attractive because low cost techniques can be used to obtain high efficiency thin film photovoltaic devices. Several research groups around the world have developed CIGS/CdS solar cells with efficiencies larger than 15% [1] using evaporation, making it an attractive and reliable technique for thin film deposition. Our PVD system is provided with MBE-type Knudsen cells to deposit CIGS thin films on glass/Molibdenum (Mo) substrates. The deposition conditions for each metal source have been established by doing a deposition profile of temperature data vs. growth rate by co-evaporation to obtain CIGS thin film for solar cells. Characterization of the co-evaporated CIGS thin films was performed by X-ray diffraction (X-RD), scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) techniques. Good quality polycrystalline films were obtained as shown by X-RD patterns. SEM micrographs show films having a very uniform appearance with large grain sizes (~1 µm). Photoluminescence (PL) studies on CIGS samples with different Ga and Cu concentrations (Ga/Ga+In) = 0.25 and 0.34 and (Cu/In+Ga) = 0.83, 0.88 and 0.94) have been performed. The EDS results have shown that is possible to control very precisely the CIGS thin film composition using these Knudsen cells. Film thicknesses of ~3-4 µm, were measured with an Ambios profilemeter XP 100 stylus type. A conversion efficiency of 10.9 % has been achieved for solar cells made from the co-evaporated absorbers |
| Disciplines: | Física y astronomía, Ingeniería |
| Keyword: | Física de materia condensada, Ingeniería de materiales, Cobre policristalino, Coevaporación, Películas delgadas, Celdas solares |
| Keyword: | Physics and astronomy, Engineering, Condensed matter physics, Materials engineering, Polycrystalline Copper, Co-evaporation, Thin films, Solar cells |
| Full text: | Texto completo (Ver HTML) |
