Nanoimprinted backside reflectors for a-Si:H thin-film solar cells: Critical role of absorber front textures
| Autor: | Christian Fisker, Thomas Garm Pedersen, Yao-Chung Tsao |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Amorphous silicon
Materials science Silicon business.industry chemistry.chemical_element Solar energy Atomic and Molecular Physics and Optics Nanoimprint lithography law.invention chemistry.chemical_compound Optics Solar cell efficiency chemistry law Solar cell Heat deflection temperature Optoelectronics Thin film business |
| Zdroj: | Yao-Chung, E T, Fisker, C & Pedersen, T G 2014, ' Nanoimprinted backside reflectors for a-Si:H thin-film solar cells : Critical role of absorber front textures ', Optics Express, vol. 22, no. S3, pp. A651-A662 . https://doi.org/10.1364/OE.22.00A651 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.22.00a651 |
| Popis: | The development of optimal backside reflectors (BSRs) is crucial for future low cost and high efficiency silicon (Si) thin-film solar cells. In this work, nanostructured polymer substrates with aluminum coatings intended as BSRs were produced by positive and negative nanoimprint lithography (NIL) techniques, and hydrogenated amorphous silicon (a-Si:H) was deposited hereon as absorbing layers. The relationship between optical properties and geometry of front textures was studied by combining experimental reflectance spectra and theoretical simulations. It was found that a significant height variation on front textures plays a critical role for light-trapping enhancement in solar cell applications. As a part of sample preparation, a transfer NIL process was developed to overcome the problem of low heat deflection temperature of polymer substrates during solar cell fabrication. |
| Databáze: | OpenAIRE |
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