New N-methyl pyrrole and thiophene based D-¦Ð-A systems for dye-sensitized solar cells

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• 作者：Bo Hyung Kim ^{bkim6@ncsu.edu} ; Harold S. Freeman ; ^{hfreeman@ncsu.edu} ; ^{harold_freeman@ncsu.edu}
• 关键词：DSSCs ; Heterocyclic spacers ; Recombination lifetime ; D&ndash ; ¦Ð&ndash ; A system ; IPCE ; TiO2 film
• 刊名：Dyes and Pigments
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：96
• 期：2
• 页码：313-318
• 全文大小：498 K

文摘

Dye-sensitized solar cells (DSSCs) containing novel DP-T and DP-P organic sensitizers having thiophene and N-methyl pyrrole moieties as ¦Ð bridges in a D-¦Ð-A system were assembled and characterized. Incorporation of a thiophene bridge to give sensitizer DP-T enhanced solar energy capture, while impedance spectroscopy showed a much longer electron recombination lifetime (¦Ó) for the DSSCs based on pyrrole containing sensitizer DP-P. The observed kinetics led to increased open circuit voltage (V_oc) for the device based on DP-P, regardless of types of additives (TBP or DCA) employed in the devices. Better photovoltaic performance was achieved using DP-T.