Concentrating light in Cu(In,Ga)Se2 solar cells
| Autor: | Phillip Manley, Berit Heidmann, Steven Kämmer, Guanchao Yin, Martha Ch. Lux-Steiner, Martina Schmid, Min Song, Diego Sancho-Martinez, Tristan Köhler, Shengkai Duan |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Solar cells of the next generation
0301 basic medicine Solar cells Nanostructure Materials science optical modeling photonics 02 engineering and technology Dielectric 01 natural sciences micro absorber Absorption Micrometre 03 medical and health sciences Optics 0103 physical sciences Nano Absorption (electromagnetic radiation) Nanoscopic scale Microscale chemistry 010302 applied physics light concentration Renewable Energy Sustainability and the Environment business.industry chalcopyrite solar cells ultra-thi absorber CIGSe 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 030104 developmental biology Optoelectronics nanoparticles Quantum efficiency Photonics 0210 nano-technology business |
| Popis: | Publisher’s Note: This paper, originally published on 23 September 2016, was replaced with a corrected/revised version on 21 December 2016. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance. Light concentration has proven beneficial for solar cells, most notably for highly efficient but expensive absorber materials using high concentrations and large scale optics. Here we investigate light concentration for cost efficient thinfilm solar cells which show nano- or microtextured absorbers. Our absorber material of choice is Cu(In,Ga)Se2 (CIGSe) which has a proven stabilized record efficiency of 22.6% and which - despite being a polycrystalline thin-film material - is very tolerant to environmental influences. Taking a nanoscale approach, we concentrate light in the CIGSe absorber layer by integrating photonic nanostructures made from dielectric materials. The dielectric nanostructures give rise to resonant modes and field localization in their vicinity. Thus when inserted inside or adjacent to the absorber layer, absorption and efficiency enhancement are observed. In contrast to this internal absorption enhancement, external enhancement is exploited in the microscale approach: mm-sized lenses can be used to concentrate light onto CIGSe solar cells with lateral dimensions reduced down to the micrometer range. These micro solar cells come with the benefit of improved heat dissipation compared to the large scale concentrators and promise compact high efficiency devices. Both approaches of light concentration allow for reduction in material consumption by restricting the absorber dimension either vertically (ultra-thin absorbers for dielectric nanostructures) or horizontally (micro absorbers for concentrating lenses) and have significant potential for efficiency enhancement. |
| Databáze: | OpenAIRE |
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