Bao Le Quoc, Hai Nguyen Thi, Lee Chi Hwan, Thogiti Suresh, Kim Jae Hong
J Nanosci Nanotechnol. 2015 Nov;15(11):8813-9. doi: 10.1166/jnn.2015.11536.
Two simple organic dyes (J1 and J2) containing julolidine as the electron donor were synthesized. The simple structure of julolidine attached to the cyanoacetic acid group formed two compounds (anion and neutral forms of E-CCVJ), which showed two different efficiencies when applied to dye-sensitized solar cells (DSSCs). Overall conversion efficiencies of 0.91% and 1.21% were obtained for DSSCs based on the cyanoacetic acid (J1) and cyanoacetate (J2) derived dyes, respectively. Compared to the cyanoacetic acid terminated dye, the current density, open circuit voltage and conversion efficiency of the solar cells based on cyanoacetate dye were increased by approximately 24%, 8% and 32%, respectively. The electrochemical impedance analysis showed that the better charge transfer of TiO2 (e-) and electron lifetime (τ(e)) for J2 dye as compared with J1. The power conversion efficiency was found to be quite sensitive to small structural changes to the anchoring moiety.
合成了两种以久洛定作为电子给体的简单有机染料（J1和J2）。与氰基乙酸基团相连的久洛定的简单结构形成了两种化合物（E-CCVJ的阴离子和中性形式），当应用于染料敏化太阳能电池（DSSC）时，它们表现出两种不同的效率。基于氰基乙酸（J1）和氰基乙酸酯（J2）衍生染料的DSSC的总转换效率分别为0.91%和1.21%。与氰基乙酸封端的染料相比，基于氰基乙酸酯染料的太阳能电池的电流密度、开路电压和转换效率分别提高了约24%、8%和32%。电化学阻抗分析表明，与J1相比，J2染料的TiO2（e-）电荷转移更好，电子寿命（τ（e））更长。发现功率转换效率对锚定部分的微小结构变化非常敏感。
