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Title: Highly efficient ultrathin-film amorphous silicon solar cells on top of imprinted periodic nanodot arrays

The addressing of the light absorption and conversion efficiency is critical to the ultrathin-film hydrogenated amorphous silicon (a-Si:H) solar cells. We systematically investigate ultrathin a-Si:H solar cells with a 100 nm absorber on top of imprinted hexagonal nanodot arrays. Experimental evidences are demonstrated for not only notable silver nanodot arrays but also lower-cost ITO and Al:ZnO nanodot arrays. The measured external quantum efficiency is explained by the simulation results. The J{sub sc} values are 12.1, 13.0, and 14.3 mA/cm{sup 2} and efficiencies are 6.6%, 7.5%, and 8.3% for ITO, Al:ZnO, and silver nanodot arrays, respectively. Simulated optical absorption distribution shows high light trapping within amorphous silicon layer.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122 (Australia)
  2. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023 (China)
  3. Plasma Sources and Application Center, NIE, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616 (Singapore)
  4. (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602 (Singapore)
Publication Date:
OSTI Identifier:
22412784
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; ALUMINIUM COMPOUNDS; AMORPHOUS STATE; DIRECT ENERGY CONVERSION; HYDROGENATION; INDIUM COMPOUNDS; LAYERS; QUANTUM DOTS; QUANTUM EFFICIENCY; SILICON; SILICON SOLAR CELLS; SILVER; THIN FILMS; TIN OXIDES; TRAPPING; VISIBLE RADIATION; ZINC OXIDES