Abstract In this research CdSe0.4Te0.6 NCs were synthesized in aqueous solution through a cheap, simple, and modified hot injection chemical precipitation method. The reflux time was altered in a wide range for the synthesis of these NCs with different size and bandgap energies. Then they were applied as a co-sensitizing layer together with CdS NCs film in the photoanod of quantum dot sensitized solar cells (QDSCs). It was shown that the QDSC with TiO2 NCs/CdSeTe(7 h)/CdS/ZnS photoelectrode demonstrated the maximum power conversion efficiency (PCE) of 4.2% in AM1.5 solar irradiation. The selected CdSeTe NCs prepared in 7 h of the reflux time were utilized in a second growth process to form core–shell CdSeTe-CdS NCs. The shell formation time was widely altered and NCs were applied in the photoanod of corresponding QDSCs. It was demonstrated that the cell with TiO2 NCs/CdSeTe(7 h)-CdS(100 min)/CdS/ZnS photoelectrode revealed the best efficiency of 4.6% in the experiments. This was due to the surface passivation of the sensitizing NCs and better charge collection efficiency.

中文翻译：

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胶体 CdSexTe1-x – CdS 核壳纳米晶体的水性合成以及壳形成参数对相应量子点敏化太阳能电池效率的影响

摘要 本研究通过一种廉价、简单、改良的热注射化学沉淀法在水溶液中合成了 CdSe0.4Te0.6 NCs。为了合成这些具有不同尺寸和带隙能量的 NC，回流时间在很宽的范围内改变。然后将它们作为共敏化层与 CdS NCs 薄膜一起应用于量子点敏化太阳能电池 (QDSC) 的光阳极中。结果表明，具有 TiO2 NCs/CdSeTe(7 h)/CdS/ZnS 光电极的 QDSC 在 AM1.5 太阳辐射中表现出 4.2% 的最大功率转换效率 (PCE)。在 7 小时的回流时间内制备的选定 CdSeTe NCs 用于第二个生长过程，以形成核壳 CdSeTe-CdS NCs。壳形成时间被广泛改变，NCs 应用于相应 QDSCs 的光阳极。结果表明，具有 TiO2 NCs/CdSeTe(7 h)-CdS(100 min)/CdS/ZnS 光电极的电池在实验中显示出 4.6% 的最佳效率。这是由于敏化 NC 的表面钝化和更好的电荷收集效率。