Wang Wei, Zhao Lianjing, Wang Yuan, Xue Weinan, He Fangfang, Xie Yiling, Li Yan
Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , China.
J Am Chem Soc. 2019 Mar 13;141(10):4300-4307. doi: 10.1021/jacs.8b10901. Epub 2019 Mar 5.
Sufficient loading of presynthesized quantum dots (QDs) on mesoporous TiO electrodes is the prerequisite for the fabrication of high-performance QD-sensitized solar cells (QDSCs). Here, we provide a general approach for increasing QD loading on mesoporous TiO films by surface engineering. It was found that the zeta potential of presensitized TiO can be effectively adjusted by surfactant treatment, on the basis of which additional QDs are successfully introduced onto photoanodes during secondary deposition. The strategy developed, that is, the secondary deposition incorporating surfactant treatment, makes it possible to load various QDs onto photoanodes regardless of the nature of QDs. In standard AM 1.5G sunlight, a certified efficiency of 10.26% for the QDSC with CuS/brass counter electrodes was achieved by the secondary deposition of Zn-Cu-In-Se QDs.
在介孔TiO电极上充分负载预合成的量子点（QDs）是制备高性能量子点敏化太阳能电池（QDSCs）的前提条件。在此，我们提供了一种通过表面工程增加介孔TiO薄膜上量子点负载量的通用方法。研究发现，通过表面活性剂处理可以有效调节预敏化TiO的zeta电位，在此基础上，在二次沉积过程中成功地将额外的量子点引入到光阳极上。所开发的策略，即结合表面活性剂处理的二次沉积，使得无论量子点的性质如何，都能够将各种量子点负载到光阳极上。在标准AM 1.5G太阳光下，通过二次沉积Zn-Cu-In-Se量子点，采用CuS/黄铜对电极的量子点敏化太阳能电池获得了10.26%的认证效率。
