Visible to Near-Infrared Responsive PbS and Ag2S Quantum Dots as Efficient Sensitizers for Solar Cells
Visible to Near-Infrared Responsive PbS and Ag2S Quantum Dots as Efficient Sensitizers for Solar Cells
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DOI：
10.1109/jphotov.2019.2945174
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发表时间：
2020-01
影响因子：
3
通讯作者：
Ru Zhou;Xi Yang;G. Cao
中科院分区：
文献类型：
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作者：
Ru Zhou;Xi Yang;G. Cao
具有窄禁带的无机量子点在设计高效的可见光至近红外响应太阳能电池方面具有广阔的应用前景。PbS和Ag2S作为两种重要的光电材料，在光伏领域的应用引起了人们的广泛关注。在这篇文章中，PbS和Ag2S量子点已被探索作为有效的敏化剂，量子点敏化太阳能电池（QDSC）。在TiO2薄膜上成功地沉积了连续离子层吸附和反应处理的量子点。得益于PbS和Ag2S的上级捕光能力，所得QDSC提供显著增强的光电流。当引入CdS覆盖层时，CdS和PbS（或Ag2S）的协同组合导致有效的表面钝化以延迟电荷复合。因此，PbS和Ag2S基QDSC诉诸共敏化与CdS产量显着提高功率转换效率的2.66%和1.80%，分别。本文介绍了全色响应量子点在构建高效太阳能电池方面的巨大前景。
Inorganic quantum dots (QDs) with narrow bandgaps are promising for the design of highly efficient visible to near-infrared responsive solar cells. As two important optoelectronic materials, PbS and Ag2S have attracted considerable attention for photovoltaic application. In this article, PbS and Ag2S QDs have been explored to serve as efficient sensitizers for QD-sensitized solar cells (QDSCs). The successive ionic layer adsorption and reaction processed QDs are successfully deposited onto TiO2 films. Benefitted from the superior light harvesting capability of PbS and Ag2S, the resultant QDSCs delivered significantly enhanced photocurrents. When CdS capping layers are introduced, the synergistic combination of CdS and PbS (or Ag2S) led to effective surface passivation for retarded charge recombination. As a result, the PbS and Ag2S-based QDSCs resorting to cosensitization with CdS yields considerably enhance power conversion efficiencies of 2.66% and 1.80%, respectively. This article highlights the great prospect of panchromatic responsive QDs for constructing highly efficient solar cells.