Abstract Cascade structure of ZnO/TiO2/CdS quantum dot sensitized solar cell (QDSSC) using precursor solutions of CdS quantum dots having different concentrations such as 0.1 M, 0.2 M, 0.5 M and 0.8 M were synthesized on fluorine doped tin oxide (FTO) substrate, using the successive ionic layer absorption and reaction (SILAR) method. A polysulfide electrolyte was used as a redox mediator. The combination of ZnO/TiO2 used as a photoanode gives the best results and changes the mechanism of the QDSSC. The conventional Pt counter electrode was replaced by a low cost CuS counter electrode. Morphological and structural characterizations were carried out by field-emission scanning electron microscope (FESEM) & X-ray diffractometer, respectively. The optical characterizations were carried out by using ultraviolet–visible (UV–Vis) spectroscopy. Degree of porosity of prepared quantum dot (QD) sensitizers on TiO2/ZnO surface of different precursor concentrations 48.90%, 45.90%, 44.20% and 42.41% were observed. J-V characteristics and the performance of the prototype solar cell devices were evaluated by using a solar simulator, under illumination with an AM 1.5G spectrum having light intensity of 100 mWcm−2. The highest efficiency was obtained 2.44% at 0.1 M concentration and the lowest was 0.52% at 0.8 M concentration.

中文翻译：

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级联结构ZnO/TiO2/CdS量子点敏化太阳能电池

摘要 ZnO/TiO2/CdS 量子点敏化太阳能电池 (QDSSC) 的级联结构使用具有不同浓度如 0.1 M、0.2 M、0.5 M 和 0.8 M 的 CdS 量子点的前驱体溶液在掺氟氧化锡 (FTO) 上合成基板，使用连续离子层吸收和反应（SILAR）方法。多硫化物电解质用作氧化还原介质。用作光阳极的 ZnO/TiO2 的组合给出了最好的结果并改变了 QDSSC 的机制。传统的 Pt 对电极被低成本的 CuS 对电极取代。形态和结构表征分别通过场发射扫描电子显微镜 (FESEM) 和 X 射线衍射仪进行。通过使用紫外-可见（UV-Vis）光谱进行光学表征。观察到制备的量子点 (QD) 敏化剂在不同前驱体浓度 48.90%、45.90%、44.20% 和 42.41% 的 TiO2/ZnO 表面上的孔隙率。在具有 100 mWcm-2 光强度的 AM 1.5G 光谱照明下，通过使用太阳能模拟器评估 JV 特性和原型太阳能电池器件的性能。在 0.1 M 浓度下获得最高效率为 2.44%，在 0.8 M 浓度下获得最低效率为 0.52%。