Shen Gencai, Du Zhonglin, Pan Zhenxiao, Du Jun, Zhong Xinhua
School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.
ACS Omega. 2018 Jan 26;3(1):1102-1109. doi: 10.1021/acsomega.7b01761. eCollection 2018 Jan 31.
The preparation of quantum dot (QD)-sensitized photoanodes, especially the deposition of QDs on TiO matrix, is usually a time-extensive and performance-determinant step in the construction of QD-sensitized solar cells (QDSCs). Herein, a transformative approach for immobilizing QD on the TiO matrix was developed by simply mixing the as-prepared oil-soluble QDs with TiO P25 particles suspension for a period as short as half a minute. The solar paint was prepared by adding the TiO/QD composite in a binder solution under ultrasonication. The QD-sensitized photoanodes were then obtained by simply brushing the solar paint on a fluorine-doped tin oxide substrate followed by a low-temperature annealing at ambient atmosphere. Sandwich-structured complete QDSCs were assembled with the use of CuS/brass as counter electrode and polysulfide redox couple as an electrolyte. The photovoltaic performance of the resulting Zn-Cu-In-Se (ZCISe) QDSCs was evaluated after primary optimization of the QD/TiO ratio as well as the thicknesses of photoanode films. In this proof of concept with a simple solar paint approach for photoanode films, an average power conversion efficiency of 4.13% ( = 11.11 mA/cm, = 0.590 V, fill factor = 0.631) was obtained under standard irradiation condition. This facile solar paint approach offers a simple and convenient approach for QD-sensitized photoanodes in the construction of QDSCs.
量子点（QD）敏化光阳极的制备，尤其是量子点在TiO基质上的沉积，通常是量子点敏化太阳能电池（QDSCs）构建过程中耗时且决定性能的步骤。在此，通过将制备好的油溶性量子点与TiO P25颗粒悬浮液简单混合短短半分钟，开发了一种将量子点固定在TiO基质上的变革性方法。通过在超声处理下将TiO/QD复合材料添加到粘合剂溶液中来制备太阳能涂料。然后，通过简单地将太阳能涂料刷涂在氟掺杂氧化锡基板上，随后在环境气氛中进行低温退火，获得量子点敏化光阳极。使用CuS/黄铜作为对电极，多硫化物氧化还原对作为电解质，组装三明治结构的完整QDSCs。在对量子点/二氧化钛比例以及光阳极薄膜厚度进行初步优化后，评估了所得Zn-Cu-In-Se（ZCISe）量子点敏化太阳能电池的光伏性能。在这种用于光阳极薄膜的简单太阳能涂料方法的概念验证中，在标准照射条件下获得了4.13%（Jsc = 11.11 mA/cm²，Voc = 0.590 V，填充因子 = 0.631）的平均功率转换效率。这种简便的太阳能涂料方法为量子点敏化太阳能电池构建中的量子点敏化光阳极提供了一种简单便捷的方法。
