Co-evaporated Cu2ZnSnSe4 films and devices
| Autor: | Jonathan Mann, Nirav Vora, Carolyn Beall, Darius Kuciauskas, Pat Dippo, Bobby To, Ingrid Repins, Wan-Ching Hsu, Rommel Noufi, Alan Goodrich, Clay DeHart |
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| Rok vydání: | 2012 |
| Předmět: |
Photoluminescence
Renewable Energy Sustainability and the Environment Band gap business.industry engineering.material Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law Photovoltaics Solar cell engineering Optoelectronics Quantum efficiency CZTS Kesterite Thin film business |
| Zdroj: | Solar Energy Materials and Solar Cells. 101:154-159 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2012.01.008 |
| Popis: | The use of vacuum co-evaporation to produce Cu2ZnSnSe4 photovoltaic devices with 9.15% total-area efficiency is described. These new results suggest that the early success of the atmospheric techniques for kesterite photovoltaics may be related to the ease with which one can control film composition and volatile phases, rather than a fundamental benefit of atmospheric conditions for film properties. The co-evaporation growth recipe is documented, as is the motivation for various features of the recipe. Characteristics of the resulting kesterite films and devices are shown in scanning electron micrographs, including photoluminescence, current-voltage, and quantum efficiency. Current-voltage curves demonstrate low series resistance without the light-dark cross-over seen in many devices in the literature. Band gap indicated by quantum efficiency and photoluminescence is roughly consistent with that expected from first principles calculation. |
| Databáze: | OpenAIRE |
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