Tuning the colors of c-Si solar cells by exploiting plasmonic effects
| Autor: | F. P. Wenzl, Wolfgang Waldhauser, Gerhard Peharz, B. Grosschädl, Christine Prietl |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Photovoltaic system 02 engineering and technology engineering.material Quantum dot solar cell 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polymer solar cell 0104 chemical sciences law.invention Optics Coating law Solar cell engineering Crystalline silicon Plasmonic solar cell Thin film 0210 nano-technology business |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2237754 |
| Popis: | The color of a crystalline silicon (c-Si) solar cell is mainly determined by its anti-reflective coating. This is a lambda/4 coating made from a transparent dielectric material. The thickness of the anti-reflective coating is optimized for maximal photocurrent generation, resulting in the typical blue or black colors of c-Si solar cells. However, for building-integrated photovoltaic (BiPV) applications the color of the solar cells is demanded to be tunable – ideally by a cheap and flexible coating process on standard (low cost) c-Si solar cells. Such a coating can be realized by applying plasmonic coloring which is a rapidly growing technology for high-quality color filtering and rendering for different fields of application (displays, imaging,…). In this contribution, we present results of an approach for tuning the color of standard industrial c-Si solar cells that is based on coating them with metallic nano-particles. In particular, thin films (< 20 nm) of a metal (e.g., silver) were sputtered onto c-Si solar cells and thermally annealed subsequently. The sizes and the shapes of the nano-particles (characterized by SEM) were found to depend on the thickness of the deposited films and the surface roughness of the substrates/solar cells. With such an approach it is possible to tune the color of the standard c-Si cells from blue to green and brownish/red. The position of the resonance peak in the reflection spectrum was found to be almost independent from the angle of incidence. This low angular sensitivity is a clear advantage compared to alternative color tuning methods, for which additional dielectric thin films are deposited on c-Si solar cells. |
| Databáze: | OpenAIRE |
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