Tuning spectral properties of phenothiazine based donor–π–acceptor dyes for efficient dye-sensitized solar cells
作者:Magdalena Marszalek、Satyawan Nagane、Amol Ichake、Robin Humphry-Baker、Vincent Paul、Shaik M. Zakeeruddin、Michael Grätzel
DOI:10.1039/c1jm14024h
日期:——
Two novel metal-free organic donorâÏâacceptor dyes were synthesized using electron-rich 10-butyl-(2-methylthio)-10H-phenothiazine as a donor and cyanoacrylic acid as an acceptor. The spectral response of the dye was tuned by introducing a vinylene thiophene Ï-bridge. Obtained optical and electrochemical properties of the dyes seemed to be promising in terms of employing them as light harvesters in dye-sensitized solar cells (DSCs). The efficiencies of the devices under standard AM 1.5G (100 mW cmâ2) conditions reached 7.3% with volatile electrolyte. The differences in the photovoltaic parameters of these DSCs were explained by comparing the results of electrochemical impedance spectroscopy (EIS) measurements and transient photovoltage and photocurrent decay experiments.
两种新型的无金属有机供体-受体染料被合成,其中,富电子的10-丁基-(2-甲硫基)-10H-吩噻嗪被用作供体,氰基丙烯酸被用作受体。通过引入乙烯基噻吩-乙桥,染料的频谱响应被调整。从染料在染料敏化太阳能电池(DSC)中用作光收集器的角度来看,所获得的染料的光学和电化学特性似乎很有前景。在标准AM 1.5G(100 mW cm-2)条件下,使用挥发性电解质的器件效率达到7.3%。通过比较电化学阻抗谱(EIS)测量结果和瞬态光电压和光电流衰减实验结果,解释了这些DSC的光电参数差异。