Yi Jie, Duan Yanfang, Liu Chunxia, Gao Shaohong, Han Xueting, An Limin
J Nanosci Nanotechnol. 2016 Apr;16(4):3904-8. doi: 10.1166/jnn.2016.11849.
Lead sulfide (PbS) quantum dots (QDs) have been synthesized via successive ionic layer adsorption and reaction (SILAR) on a titanium dioxide (TiO2) nanoporous film for the fabrication of quantum dot-sensitized solar cells (QDSCs). The reaction is environmental friendly and energy saving. The green synthesized PbS QDs match the maximum remittance region of the solar spectrum and are suitable as sensitizers for TiO2 electrodes for cell devices application. PbS QDs were adsorbed in different adsorption layers in order to improve the solar cell performance. The optical properties of PbS sensitized TiO2 films were studied by scanning electron microscopy and UV-Vis absorbance spectroscopy. The photovoltaic characteristics of the PbS QDSCs were analyzed by I-V characteristics and electrochemical impedance spectroscopy. As a result, the light harvesting was enhanced with increasing SILAR adsorption layers. The maximum photovoltaic conversion efficiency of the PbS QDSCs (3.14%) was obtained at the 12 adsorption layers with the highest short circuit current density and lowest charge transfer resistance.
通过连续离子层吸附和反应（SILAR）在二氧化钛（TiO₂）纳米多孔膜上合成了硫化铅（PbS）量子点（QDs），用于制备量子点敏化太阳能电池（QDSCs）。该反应环保且节能。绿色合成的PbS量子点与太阳光谱的最大发射区域相匹配，适合用作电池器件应用中TiO₂电极的敏化剂。为了提高太阳能电池性能，将PbS量子点吸附在不同的吸附层中。通过扫描电子显微镜和紫外可见吸收光谱研究了PbS敏化TiO₂薄膜的光学性质。通过I-V特性和电化学阻抗谱分析了PbS QDSCs的光伏特性。结果表明，随着SILAR吸附层数的增加，光捕获能力增强。在12个吸附层时，PbS QDSCs获得了最大光伏转换效率（3.14%），此时短路电流密度最高，电荷转移电阻最低。
