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Indexed by:期刊论文

Date of Publication:2019-01-01

Journal:SYNTHETIC METALS

Included Journals:SCIE、Scopus

Volume:247

Page Number:228-232

ISSN No.:0379-6779

Key Words:Phenothiazine; Phenoxazine; Dye-sensitized solar cells; Comparative analysis

Abstract:Herein, a comparative analysis was carried out to investigate the relationship between performance and structures of PTZ-2 and POZ-2 which based on the units of phenothiazine (PTZ) and phenoxazine (POZ) respectively. The spectral analysis shows that the maximum absorption peaks of these two dyes are 438 rim (PTZ-2) and 465 nm (POZ-2). Electrochemical analysis demonstrate that the better light-harvesting performance of POZ-2 dye is due to its narrow E0-0 (zero-zero transition Energy). Further photovoltaic measurement results show that the eta of POZ-2 is 6.4% (V-oc = 0.727 V, J(sc)=12.58 mA cm(-2)) which is higher than that of PTZ-2 (eta = 4.9%, V-oc = 0.722 V; J(sc) = 9.06 mA cm(-2)). Finally, the theoretical calculations show that the C-S-C bond angle (98 degrees) in PTZ-2 is significantly smaller than the C-O-C bond angle (116 degrees) in POZ-2 which attribute to the larger atom radius of "S" than "O". Therefore, a more obvious folding deformation was created in the structure of PTZ-2. That was the main cause of the difference performance between these two dyes.