Journal
TETRAHEDRON
Volume 88, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2021.132124
Keywords
Novel carbazole derivative donor; Dye-sensitized solar cell; Efficient photovoltaics; D-pi-A-structured organic sensitizers; Cobalt electrolyte
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Funding
- National Natural Science Foundation of China [51661135021, 21606039, U1710117]
- Swiss National Science Foundation [IZLCZ2_170177]
- Swedish Foundation for Strategic Research (SSF)
- Swedish Energy Agency
- Knut and Alice Wallenberg Foundation
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The introduction of a fused-ring on the donor unit of AJ303 led to an appropriate energy level, less recombination, and longer electron lifetime, resulting in a higher power conversion efficiency compared to AJ301 and [Cu(tmby)(2)](2+/+)-based electrolyte.
Two novel dyes that are similar in chemical structure, except for different donor units, AJ301and AJ303 were synthesized, characterized and applied as sensitizers in dye-sensitized solar cells (DSSCs). Both dyes exhibited a wide absorption of visible sunlight. The introduction of fused rings on the donor unit of AJ303 presented an appropriate energy level, less recombination and longer electron lifetime to achieve a power conversion efficiency (PCE) of 10.2%, far above that achieved for AJ301 of 6.2% with a [Co(bpy)(3)](2+/3+)-based electrolyte under standard AM1.5G solar irradiation (100 mW cm(-2)). The DSSCs based on AJ303 and AJ301 with [Cu(tmby)(2)](2+/+)-based electrolyte showed a lower PCE of 8.2% and 5.4%, respectively. Therefore, the results indicated that the introduction of a fused-ring in the donor group is a meaningful synthetic strategy to improve the photovoltaic performance. (C) 2021 Elsevier Ltd. All rights reserved.
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