Enhancement of optical absorption in amorphous silicon thin film solar cells with periodical nanorods to increase optical path length |
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| Authors: | Gaige Zheng Linhua Xu Min Lai Yunyun Chen Yuzhu Liu Xiangyin Li |
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| Affiliation: | 1. College of Mathematics and Physics, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China;2. School of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;3. Paul Scherrer Institute, WSLA-004, Villigen CH5232, Switzerland;1. College of Chemistry & Chemical Engineering, Anhui Province Key Laboratory of Environment – Friendly Polymer Materials, Anhui University, Hefei 230039, Anhui, PR China;2. School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, PR China;1. Université Blaise Pascal, France;2. CNRS, France;1. Department of Electrical and Electronics Engineering, University of Gaziantep, 27310 Gaziantep, Turkey;2. Center for Research and Application of Nanoscience and Nanoengineering, Ataturk University, 25240 Erzurum, Turkey;3. Associated Plasma Laboratory, National Institute for Space Research, 12227-010 São José dos Campos, SP, Brazil;4. Department of Electricity and Energy, Bayburt University, Bayburt 69000, Turkey;5. Department of Electrical and Electronics Engineering, Ataturk University, 25240 Erzurum, Turkey;1. Institute of Materials Research and Engineering, A?STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, #08-03, Innovis,138634 Singapore;2. NOVITAS, School of Electrical and Electronic Engineering, Block S2, Nanyang Technological University, Nanyang Avenue, 639798 Singapore;3. Discipline of Metallurgy Engineering and Materials Science, IIT Indore, Indore, MP 453552, India;4. Belarusian State University of Informatics and Radioelectronics, P. Brovki 6, Minsk 220013, Belarus |
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| Abstract: | ![]()
In this paper, we demonstrate an amorphous silicon (a-Si) thin film solar cell (TFSC) with a homogeneous layer of a-Si to absorb short wavelength photons and periodical a-Si nanorod structures for light trapping enhancement for longer wavelength photons. In such a design, the total absorption can be greatly improved. The periodicity and duty ratio of the nanorods were optimized to enhance the total optical absorption within 500 nanometer (nm) to 1000 nm in the hybrid TFSC structure. The best overall absorption can be achieved when period of nanorods is about 500 nm. When the duty ratio of nanorods is 0.6, the average absorption can reach 80% which represents an improvement by 40% compared to the conventional thin film a-Si solar cell without nanorod structures. |
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