Facile Secondary Deposition for Improving Quantum Dot Loading in Fabricating Quantum Dot Solar Cells.
Facile Secondary Deposition for Improving Quantum Dot Loading in Fabricating Quantum Dot Solar Cells.
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DOI：
10.1021/jacs.8b10901
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发表时间：
2019-02
影响因子：
15
通讯作者：
Wei Wang;Lianjing Zhao;Yuan Wang;Weinan Xue;Fangfang He;Yiling Xie;Yan Li
中科院分区：
文献类型：
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作者：
Wei Wang;Lianjing Zhao;Yuan Wang;Weinan Xue;Fangfang He;Yiling Xie;Yan Li
在介孔TiO2电极上充分加载预合成量子点（QDs）是制备高性能量子点敏化太阳能电池（qdsc）的先决条件。在这里，我们提供了一种通过表面工程增加介孔TiO2薄膜上QD负载的一般方法。结果表明，表面活性剂处理可以有效地调节TiO2的zeta电位，并在此基础上成功地在二次沉积过程中在光阳极上引入额外的量子点。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，都可以将各种量子点加载到光阳极上。在标准AM 1.5G阳光下，通过二次沉积Zn-Cu-In-Se量子点，Cu2S/黄铜对电极QDSC的认证效率为10.26%。
Sufficient loading of presynthesized quantum dots (QDs) on mesoporous TiO2 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 TiO2 films by surface engineering. It was found that the zeta potential of presensitized TiO2 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 Cu2S/brass counter electrodes was achieved by the secondary deposition of Zn-Cu-In-Se QDs.