Quantum dots (QDs) of I-III-VI₂ ternary compounds, such as CuInSe₂ (CISe) and CuInS₂ (CIS), have broad application prospects as light-absorbing layers in solar cells due to their excellent photoelectric properties. Nevertheless, the presence of large numbers of surface defects in quantum dots will affect their performance. In this study, inverted type-I CdS/CISe core-shell QDs are successfully synthesized through thermal injection method in triethylene glycol, which is green and safe. By changing the molar ratios of CdS and CISe QDs, the components and optical properties of core-shell QDs are intensively studied by using different characterization methods (XRD, TEM, EDS, UV–vis, Raman, and fluorescence spectrum). The solar cells with the structure of FTO/TiO₂/CdS/CdS/CISe/Mo are assembled, where the CdS/CISe core-shell QDs are used as absorption layers. The prepared devices exhibit an efficiency of 1.01% under an AM 1.5 G spectrum with a light intensity of 100 mW cm⁻².

中文翻译：

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CdS/CISe核壳结构量子点的绿色合成及其光伏应用

_{I-III-VI 2}三元化合物的量子点(QD) ，如CuInSe ₂ (CISe)和CuInS ₂ (CIS)，由于其优异的光电性能，作为太阳能电池中的光吸收层具有广阔的应用前景。然而，量子点中大量表面缺陷的存在会影响其性能。本研究通过热注射法在三甘醇中成功合成了倒置I型CdS/CISe核壳量子点，该量子点绿色、安全。通过改变CdS和CISe量子点的摩尔比，利用不同的表征方法（XRD、TEM、EDS、UV-vis、拉曼和荧光光谱）深入研究了核壳量子点的组分和光学性质。_{组装了FTO/TiO 2} /CdS/CdS/CISe/Mo结构的太阳能电池，其中CdS/CISe核壳量子点作为吸收层。^{所制备的器件在光强度为100 mW cm -2}的AM 1.5 G光谱下表现出1.01%的效率。