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Plasmon‐Induced Broadband Light‐Harvesting for Dye‐Sensitized Solar Cells Using a Mixture of Gold Nanocrystals
Author(s) -
Zhang Ye,
Sun Zhe,
Cheng Si,
Yan Feng
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600110
Subject(s) - photocurrent , dye sensitized solar cell , materials science , nanorod , plasmon , energy conversion efficiency , nanocrystal , visible spectrum , optoelectronics , doping , chemical engineering , electrolyte , photochemistry , nanotechnology , chemistry , electrode , engineering
The efficiency of dye‐sensitized solar cells (DSSCs) is generally limited by the mismatch between the absorption spectrum of the photosensitizer and the solar irradiation spectrum. This work describes the use of a mixture that containing proper proportions of SiO 2 coated Au nanospheres (AuNSs@SiO 2 ) and Au nanorods (AuNRs@SiO 2 ) (the mixture was denoted as AuNCs@SiO 2 ) to enhance the sunlight utility in DSSCs. The incorporation of AuNCs@SiO 2 into the TiO 2 photoanode induced broadband light‐harvesting at both low‐ and long‐ wavelengths and thus enhanced the photocurrent compared to that of plasmonic solar cells based on either AuNSs@SiO 2 or AuNRs@SiO 2 . Upon the doping of AuNCs@SiO 2 , the overall power conversion efficiency (PCE) increased from 7.39 to 9.12 % for DSSCs based on organic liquid electrolytes.