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- Title
Co-sensitization of N719 with an Organic Dye for Dye-sensitized Solar Cells Application.
- Authors
Zhisheng Wu; Yinni Wei; Zhongwei An; Xinbing Chen; Pei Chen
- Abstract
The co-sensitization of N719 with a cyclic thiourea functionalized organic dye, coded AZ5, for dye-sensitized solar cells (DSSCs) was demonstrated. Due to its intensive absorption in ultraviolet region, AZ5 could compensate the loss of light harvest induced by triiodide, thereby the short-circuit photocurrent density (Jsc) was increased for co-sensitized (N719+AZ5) DSSC. Moreover, the electron recombination and dye aggregation were retarded upon N719 cocktail co-sensitized with AZ5, thus the open-circuit voltage (Voc) of co-sensitized device was enhanced as well. The increased Jsc (17.9 mA ⋅ cm-2) combined with the enhanced Voc (698 mV) ultimately resulted in an improved power conversion efficiency (PCE) of 7.91% for co-sensitized DSSC, which was raised by 8.6% in comparison with that of N719 (PCE = 7.28%) sensitized alone. In addition, co-sensitized DSSC exhibited a better stability than that of N719 sensitized device probably due to the depression of dye desorption.
- Subjects
THIOUREA; ORGANIC dyes; DYE-sensitized solar cells; PHOTOCURRENTS; ELECTRON recombination
- Publication
Bulletin of the Korean Chemical Society, 2014, Vol 35, Issue 5, p1449
- ISSN
0253-2964
- Publication type
Article
- DOI
10.5012/bkcs.2014.35.5.1449