Rapid fabrication and trimming of nanostructured backside reflectors for enhanced optical absorption in a -Si:H solar cells
| Autor: | Kjeld Møller Pedersen, Thomas Garm Pedersen, Thomas Søndergaard, Yao-Chung Tsao, Peter Kristensen, Rita Rizzoli |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Amorphous silicon
Materials science Fabrication Absorption spectroscopy business.industry Anodizing chemistry.chemical_element Nanotechnology General Chemistry engineering.material nanostructuring chemistry.chemical_compound a-Si:H thin films solar cells Coating chemistry porous alumina Aluminium engineering Optoelectronics General Materials Science Quantum efficiency light trapping business Absorption (electromagnetic radiation) |
| Zdroj: | Tsao, Y-C, Søndergaard, T, Kristensen, P K, Rizolli, R, Pedersen, K & Pedersen, T G 2015, ' Rapid fabrication and trimming of nanostructured backside reflectors for enhanced optical absorption in a-Si:H solar cells ', Applied Physics A: Materials Science & Processing, vol. 120, no. 2, pp. 417-425 . https://doi.org/10.1007/s00339-015-9205-1 Applied physics. A, Materials science & processing 120 (2015): 417–425. doi:10.1007/s00339-015-9205-1 info:cnr-pdr/source/autori:Tsao, Yao Chung; Søndergaard, Thomas; Kristensen, Peter Kjær; Rizzoli, Rita; Pedersen, Kjeld; Pedersen, Thomas Garm/titolo:Rapid fabrication and trimming of nanostructured backside reflectors for enhanced optical absorption in a-Si:H solar cells/doi:10.1007%2Fs00339-015-9205-1/rivista:Applied physics. A, Materials science & processing (Print)/anno:2015/pagina_da:417/pagina_a:425/intervallo_pagine:417–425/volume:120 |
| DOI: | 10.1007/s00339-015-9205-1 |
| Popis: | Nanostructured metallic backside reflectors (BSRs) are crucial for enhanced optical absorption in thin-film amorphous silicon solar cells. The structural fabrication based on rapid aluminum (Al) anodization has a potential for roll-to-roll processes, which are promising for low-cost and large-scale fabrication of BSRs. In this regard, the short fabrication time via appropriate choice of acid, acid concentration, temperature, and time-dependent voltage control is very important. In addition, we first demonstrate the trimming of structural height by using conventional Al anodization, so the best pore size of BSRs with the same structural height can be determined. According to integrated external quantum efficiency (IEQE) calculations, the nanostructured BSR with 430-nm pore size shows 51.6 % IEQE improvement compared with the value of the flat BSR. Moreover, it is interesting that the absorption spectra of a-Si:H on nanostructured Al BSRs with and without the 100-nm Ag coating are highly similar even if the optical properties of Al and Ag are different. |
| Databáze: | OpenAIRE |
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