This paper describes the synthesis and characterization of Si and CdTe quantum dots (QDs) and their use, either on their own or combined, as photoluminescent (PL) down-shifting nanostructured coatings aimed to enhance the photovoltaic efficiency of polycrystalline silicon solar cells. To this end, the front face of a set of silicon cells was coated with different volume ratios of the above-mentioned QDs, or some of its mixtures, dispersed in PMMA layers. Previously, the absorption and the PL (exc = 380 nm) response of the dispersions of the QDs were measured. It was observed that the PL response of the mixtures was strongly affected in location, spread, and intensity of the emission peak according to the volume ratio involved. As compared to the unmixed CdTe samples, a notorious red-shift of the main peak location was obtained for a couple of mixed QDs’ dispersions, which was one of the project objectives given that Si solar cells respond better to photons with wavelengths in the 650–700 nm range. This effect was confirmed in a set of polycrystalline Si solar cells covered with and without nanostructured PMMA/QDs layers tested under AM 1.5G solar simulator conditions. It was found that the use of the proposed mixtures of QDs gave an increase of 1.53% in solar cell power conversion efficiency.

中文翻译：

---

Si和CdTe量子点的合成及其在硅太阳能电池中作为下移光致发光中心的组合使用

本文介绍了Si和CdTe量子点（QD）的合成和表征，以及它们单独或组合使用时作为光致发光（PL）下移纳米结构涂层的用途，旨在提高多晶硅太阳能电池的光伏效率。为此，用分散在PMMA层中的不同体积比的上述QD或其一些混合物涂覆一组硅电池的正面。以前，已经测量了QD分散体的吸收和PL（exc = 380 nm）响应。观察到，根据所涉及的体积比，混合物的PL响应在发射峰的位置，扩散和强度上受到很大影响。与未混合的CdTe样品相比，对于两个混合量子点的色散，获得了臭名昭著的主峰位置红移，这是该项目的目标之一，因为硅太阳能电池对波长在650-700 nm范围内的光子有更好的响应。在一组覆盖有和没有纳米结构的PMMA / QDs的多晶硅太阳能电池中，在AM 1.5G太阳模拟器条件下进行了测试，证实了这种效果。发现使用建议的QD混合物可以使太阳能电池功率转换效率提高1.53％。5G太阳模拟器条件。发现使用建议的QD混合物可以使太阳能电池功率转换效率提高1.53％。5G太阳模拟器条件。发现使用建议的QD混合物可以使太阳能电池功率转换效率提高1.53％。