咔唑
色素敏化染料
部分
光电流
化学
能量转换效率
亚苯基
光化学
电化学
电子供体
接受者
共轭体系
开路电压
太阳能电池
有机太阳能电池
立体化学
光电子学
有机化学
电解质
电极
材料科学
电压
物理化学
催化作用
聚合物
物理
量子力学
凝聚态物理
作者
Taweesak Sudyoadsuk,S. Pansay,Somphob Morada,Rattanawalee Rattanawan,Supawadee Namuangruk,Tinnagon Kaewin,Siriporn Jungsuttiwong,Vinich Promarak
标识
DOI:10.1002/ejoc.201300373
摘要
Abstract A series of new D–D–π–A‐type organic dyes – CCT n A ( n = 1–3), CCT3N and CCT2PA , bearing the 3‐(3′,6′‐di‐ tert ‐butylcarbazol‐ N′ ‐yl)‐ N ‐dodecylcarbazol‐6‐yl system as an electron donor moiety (D–D) – were synthesized by convenient methods and successfully utilized as dye sensitizers for dye‐sensitized solar cells (DSSCs). The central π‐conjugated bridges were made of oligothiophene and oligothiophene‐phenylene units, whereas the acceptor groups were either cyanoacrylic acid or cyanoacrylamide. Detailed investigation into the relationship between the structures, spectral and electrochemical properties, and performances of the DSSCs is described. The DSSC devices performed remarkably well, with typical overall conversion efficiencies of 3.60–5.69 %, and optimal incident photon‐to‐current conversion efficiencies (IPCEs) exceeding 80 %. The devices containing oligothiophene bridging groups performed better than those with oligothiophene‐phenylene bridging groups. Of solar cells based on these dyes, the CCT3A ‐based one gave a maximum IPCE value of 84 %, a short‐circuit photocurrent density ( J sc ) of 11.31 mA cm –2 , an open‐circuit voltage ( V oc ) of 0.71 V and a fill factor (FF) of 0.71, corresponding to an overall conversion efficiency ( η ) of 5.69 % (>96 % of that of the reference N719‐based cell, η = 5.92 %). This work suggests that the organic dyes based on donor moieties or donor molecular architectures of this type are promising candidates for improvement of the performances of DSSCs.
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