Pulse potentiostatic electropolymerization of high performance PEDOT counter electrodes for Pt-free dye-sensitized solar cells
Pulse potentiostatic electropolymerization of high performance PEDOT counter electrodes for Pt-free dye-sensitized solar cells
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用于无铂染料敏化太阳能电池的高性能 PEDOT 对电极的脉冲恒电位电聚合
DOI：
10.1016/j.electacta.2012.07.113
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发表时间：
2012-11
影响因子：
6.6
通讯作者：
Yue, Gen-Tian
中科院分区：
文献类型：
--
作者：
Xiao, Yao-Ming;Lin, Jeng-Yu;Wu, Ji-Huai;Tai, Sheng-Yen;Yue, Gen-Tian
采用脉冲恒电位电聚合法在氟化氧化锡（FTO）基底上制备了高性能的聚（3，4-乙撑二氧噻吩）（PEDOT）纳米片，作为染料敏化太阳能电池（DSSC）的对电极。研究了各种脉冲参数对PEDOT薄膜形貌的控制。优化后，在1.2V的脉冲开启电位、0.2V的脉冲反转电位、1 s的脉冲开启周期、0.5s的脉冲反转周期和900 ℃的脉冲持续时间下，可以得到具有纳米草甸形貌的PEDOT薄膜。广泛的循环伏安（CV）表明，纳米草甸PEDOT CE对I3−还原具有优异的电催化活性。此外，纳米草甸PEDOT CE的峰值电流密度在连续300 CV测试后没有显示出降解的迹象，表明PEDOT CE具有很好的电化学稳定性。电化学阻抗谱显示脉冲PEDOT电极的电荷转移电阻（RCT）最低，为1.27Ω cm 2。因此，由于其固有的上级电催化活性和来自纳米草甸形态的高表面积，用脉冲PEDOT CE组装的DSSC在全阳光照射（100 mWcm-2，AM 1.5 G）下显示出6.40%的增强的光伏转换效率（与具有Pt CE的DSSC的5.75%相比）。因此，脉冲PEDOT CE可以被认为是用于低成本无Pt DSSC的有前途的替代CE。
High performance nano-meadows poly(3,4-ethylenedioxythiophene) (PEDOT) were electropolymerized onto the fluorinated tin oxide (FTO) substrates as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs) by using the pulse potentiostatic electropolymerization method. Various pulse parameters were studied to control the morphology of PEDOT films. After optimization, a PEDOT film with nano-meadows morphology can be obtained under 1.2V pulse-on potential, 0.2V pulse-reversal potential, 1s pulse-on period, 0.5s pulse-reversal period, and total 900 duration time. The extensive cyclic voltammograms (CV) showed the nano-meadows PEDOT CE with excellent electrocatalytic activity for I3−reduction. Moreover, the peak current densities of the nano-meadows PEDOT CE showed no sign of degradation after consecutive 300 CV tests, suggesting the great electrochemical stability of the PEDOT CE. The electrochemical impedance spectroscopy showed the pulsed PEDOT CE has the lowest charge-transfer resistance (RCT) of 1.27Ωcm2among all CEs tested in this study. Thus, the DSSC assembled with the pulsed PEDOT CE showed an enhanced photovoltaic conversion efficiency of 6.40% (compared to 5.75% for DSSCs with Pt CE) under full sunlight illumination (100mWcm−2, AM1.5 G) due to its intrinsic superior electrocatalytic activity and high surface area from the nano-meadows morphology. Therefore, the pulsed PEDOT CE can be considered as a promising alternative CE for use in low-cost Pt-free DSSCs.
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影响因子：
12.6
作者：
W. Schuhmann;Christine Kranz;Heidi Wohlschläger;Johanna Strohmeier
通讯作者：
W. Schuhmann;Christine Kranz;Heidi Wohlschläger;Johanna Strohmeier
影响因子：
3.9
作者：
Lin, Jeng-Yu;Liao, Jen-Hung
通讯作者：
Liao, Jen-Hung
影响因子：
10.8
作者：
Mor, GK;Shankar, K;Grimes, CA
通讯作者：
Grimes, CA
影响因子：
6.9
作者：
T. Yohannes;O. Inganäs
通讯作者：
T. Yohannes;O. Inganäs
影响因子：
6.7
作者：
Björn A. Andersson
通讯作者：
Björn A. Andersson