锰掺杂硒硫化镉光阳极的制备与光电性能

将适量Se加入到Na2S甲醇水溶液中反应生成Na₂SSe₂阴离子前驱体, 以Cd(NO₃)2、Mn(CH3COO)2为阳离子前驱体, 通过连续离子层吸附反应(SILAR)分别制备出CdSSe₂/TiO₂或 MN²⁺掺杂的Mn-CdSSe₂/TiO₂量子点敏化光阳极。采用拉曼光谱、X射线光电子能谱和能量色散X射线能谱分析确定阴离子前驱体和量子点的价键结构和组成;通过紫外可见吸光光谱表征量子点的光吸收性能;利用J-V曲线和IPCE分别对CdS、CdSSe₂和Mn-CdSSe₂量子点敏化的TiO₂光阳极的光电性能进行了表征。实验结果表明, 采用 0.12 mol·L^-1 Se和0.5 mol·L^-1 Na2S制备的阴离子前驱体、0. 5 mol·L^-1 Cd²⁺和 0.3 mol·L^-1 MN²⁺阳离子前驱体, 通过SILAR法制备的Mn-CdSSe₂/TiO₂光阳极, 能量转换效率比CdSSe₂/TiO₂和CdS/TiO₂光阳极分别提高了90%和247%。

Preparation and Photoelectric Performance of Mn-Doped-CdSSe2 Quantum Dots Sensitized Electrode

Sodium sulfide-selenium prepared by adding Se powder into the Na₂S methanol-water solution was used as the anionic precursor, and the methanol-water solution of Cd(NO₃)₂ and Mn(CH₃COO)₂ was used as the cationic precursor, respectively. Then, cadmium sulfide-selenium quantum dots sensitized TiO₂ photoanodes (CdSSe₂/TiO₂) and MN²⁺ doped cadmium sulfide-selenium quantum dots sensitized TiO₂ photoanodes (Mn-CdSSe₂/TiO₂) were successfully prepared by the successive ionic layer adsorption and reaction (SILAR) for Quantum dots solar cell (QDSC). The Raman spectrum, XPS were applied to analyze the chemical bonds of the Na₂SSe₂ precursors. EDX and UV-Vis were investigated the composition and light absorption property of Mn-CdSSe₂/TiO₂ photoanode. J-V curves and IPCE were used to characterize photovoltaic performance of the as-prepared CdS/TiO₂, CdSSe₂/TiO₂ and Mn-CdSSe₂/TiO₂ photoanodes. The results reveals that the Mn-CdSSe₂/TiO₂ photoanode with enhanced energy conversion efficiency has been fabricated by SILAR method using the anionic precursors prepared with 0.12 mol·L^-1 Se and 0.5 mol·L^-1 Na₂S, the cationic precursor of 0.5 mol·L^-1 Cd²⁺ and 0.3 mol·L^-1 MN²⁺. Compared with the CdSSe₂/TiO₂ and CdS/TiO₂ photoanodes, the efficiency of the Mn-CdSSe₂/TiO₂ photoanode is increased by 90% and 247%, separately.