| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 104 === In this study, microwave assisted synthetic route was applied for rapid, facial and effective synthesis of counter electrode(CE) for quantum dots-sensitized solar cells(QDSSCs) .Moreover, it is applied for in situ deposition of metal sulfides on the CE, shorten the process time and avoids post treatments. Different metal sulfide CE(CuS, NiS, CoS2, PbS) and aqueous CuInS2/In2S3 quantum dots (QDs) are synthesized by using rapid microwave assisted synthesis approach. The CuInS2/In2S3 QDs photoanode with the CuS CE exhibits champion of short circuit current density (Jsc) of 26.76 mA/cm2, open voltage (Voc) of 650 mV and power conversion efficiency(PCE) of 8.32% at one sun (AM 1.5 G, 100 mW/cm2).
Electrochemical impedance spectroscopy (EIS), Tafel and cyclic voltammetry (CV)
measurement was employed to understand electro dynamic behavior of metal sulfide CE. Analysis of the data shows that CuS CE performs high electrocatalytic activity towards polysulfide reduction compared with other metal sulfide CE.
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