Influence of spatial arrangements of ¦Ð-spacer and acceptor of phenothiazine based dyes on the performance of dye-sensitized solar cells

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• 作者：Zafar Iqbal ; Wu-Qiang Wu ; Hai Zhang ; Lijun Han ; Xiaoming Fang ; Lingyun Wang ; Dai-Bin Kuang ; Herbert Meier ; Derong Cao
• 关键词：Organic dye ; Double acceptor ; Dye-sensitized solar cells ; Phenothiazine ; ¦Ð-Extension ; Spatial arrangement
• 刊名：Organic Electronics
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：14
• 期：10
• 页码：2662-2672
• 全文大小：1637 K

文摘

Three phenothiazine based organic dyes PTA, PDTA and PTDA with D-¦Ð-A, ¦Ð-D-¦Ð-A and A-¦Ð-D-¦Ð-A frameworks were designed and synthesized for the dye sensitized solar cells (DSSCs). Phenothiazine with octyloxyphenyl moiety acts as donor while thiophene and cyanoacetic acid units act as a ¦Ð-spacer and an acceptor, respectively. The effects of the molecular structures of the dyes on the performance of the DSSCs were investigated systematically along with their photophysical and photoelectrochemical properties. The dye PTDA with A-¦Ð-D-¦Ð-A framework exhibited a better light harvesting capacity and an effective electron extraction pathway from the electron donor to the TiO₂ surface, leading to an efficiency of 6.82 % under 100 mW cm^?2 light illumination, while the dyes PTA and PDTA with D-¦Ð-A and ¦Ð-D-¦Ð-A frameworks delivered efficiencies of 6.34 % and 5.12 % , respectively.