Application of AgInSe2 nanoparticles to boost the power conversion efficiency of CdS QDs-sensitized solar cells

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2024-09-18 DOI:10.1016/j.jssc.2024.125020

Moniba Ahmadi, Maziar Marandi

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Abstract

In this study, bandgap engineering was utilized to assess the efficiency of photoanodes incorporating CdS nanocrystals and AgInSe₂ (AISe) quantum dots (QDs) in quantum dot-sensitized solar cells (QDSSCs). Initially, the deposition of CdS(Xc) nanocrystal layers on a TiO₂ substrate was tested using the SILAR method with varying cycles (X = 1–6). Optical transmission analysis revealed a redshift in the absorption edge and reduced transmission with an increasing number of cycles. J-V analysis of TiO₂ NCs/CdS(Xc) photoanodes identified cycle X = 5 as optimal. The short-circuit current density (J_sc), open-circuit voltage (V_oc), fill factor (FF) and maximum power conversion efficiency (PCE) were 15.5 mA/cm², 614 mV, 40 %, and 3.76 %, respectively. Subsequently, pre-synthesized AISe QDs were deposited on TiO₂ nanocrystals/CdS(Xc) photoanodes, exhibiting a single absorption edge with a bandgap energy of 2.19 eV for all photoanodes. The TiO₂ NCs/CdS(5c)/AISe/ZnS photoanode showed an increase in J_sc and efficiency, reaching 17.25 mA/cm² and 4.27 %, respectively. Utilizing sub-micron-sized TiO₂ hollow spheres (HSs) as a light-scattering layer further enhanced light absorption and performance. It was demonstrated that this approach increased the photovoltaic parameters to a J_sc of 19.12 mA/cm², FF of 43 %, and an overall efficiency of 4.75 %.

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应用 AgInSe2 纳米粒子提高 CdS QDs 感光太阳能电池的功率转换效率

本研究利用带隙工程评估了量子点敏化太阳能电池（QDSSC）中包含 CdS 纳米晶体和 AgInSe2 (AISe) 量子点 (QD) 的光阳极的效率。最初，我们使用不同周期（X = 1-6）的 SILAR 方法在 TiO2 基质上测试了 CdS(Xc) 纳米晶体层的沉积。光学透射分析表明，随着循环次数的增加，吸收边缘会发生红移，透射率也会降低。对 TiO2 NCs/CdS(Xc)光阳极进行的 J-V 分析表明，周期 X = 5 为最佳值。短路电流密度（Jsc）、开路电压（Voc）、填充因子（FF）和最大功率转换效率（PCE）分别为 15.5 mA/cm2、614 mV、40 % 和 3.76 %。随后，在 TiO2 纳米晶/CdS(Xc) 光阳极上沉积了预合成的 AISe QDs，所有光阳极都表现出带隙能为 2.19 eV 的单吸收边。TiO2 纳米晶/CdS(5c)/AISe/ZnS 光阳极的 Jsc 和效率都有所提高，分别达到 17.25 mA/cm2 和 4.27%。利用亚微米尺寸的 TiO2 空心球（HS）作为光散射层进一步提高了光吸收和性能。研究表明，这种方法将光伏参数提高到了 19.12 mA/cm2，FF 为 43 %，总效率为 4.75 %。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.