通过调节硒化镉 0.3S0.7/CdSe 光敏剂层的带隙能量来增加太阳能电池对入射光子的吸收和减少电荷重组的方法

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2024-11-13 DOI:10.1016/j.solidstatesciences.2024.107758

Saeedeh Souri, Maziar Marandi

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引用次数: 0

摘要

碲化镉0.3S0.7/碲化镉量子点敏化太阳能电池具有很高的光收集效率，是提高光电效率的理想选择。本研究采用连续离子层吸附和反应（SILAR）方法，将 CdSe0.3S0.7 卤化物量子点吸附到 TiO2 NPs 介孔薄膜上，变化周期为 1 到 7 个周期。当改变 CdSe0.3S0.7 量子点的厚度时，具有 TiO2 NPs/CdSe0.3S0.7(5c)/ZnS 光阳极的量子点敏化太阳能电池显示出更高的短路电流密度 (JSC)、开路电压 (VOC) 和功率转换效率 (PCE) 值，分别为 17.80 mA/cm2、530 mV 和 3.25 %。根据表面形貌分析的结果，相应的光电极仍然适合装载其他量子点，因为其表面仍然存在较大的孔隙。采用化学浴沉积（CBD）技术，在 TiO2 NPs/CdSe0.3S0.7 光阳极覆盖 6 到 15 分钟的不同时间内装载 CdSe QDs。硒化镉层的最佳厚度使其能级与其他层对齐，从而使光生载流子在重组前以强大的驱动力在带间移动。采用 TiO2NPs/CdSe0.3S0.7(5 个周期)/CdSe(12 分钟)/ZnS 光电极的电池具有最高的 JSC、VOC 和 PCE 值，分别为 24.70 mA/cm2、580 mV 和 6.25 %。与只包含 CdSe0.3S0.7 QD 的参考电池相比，效率提高了 92%，而且 IPCE 和 APCE 曲线的强度更高，可见光波长范围更广。这些变化是光收集效率提高的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The approach of increasing incident photon absorption and decreasing charge recombination in solar cells by regulating the bandgap energies of the CdSe0.3S0.7/CdSe photosensitizer layer

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The approach of increasing incident photon absorption and decreasing charge recombination in solar cells by regulating the bandgap energies of the CdSe0.3S0.7/CdSe photosensitizer layer

CdSe_0.3S_0.7/CdSe quantum dot sensitized solar cells are a desirable choice for increasing photovoltaic efficiency due to their high light-harvesting efficiency. In this study, the CdSe_0.3S_0.7 chalcogenide quantum dots were adsorbed onto the TiO₂ NPs mesoporous film using the successive ionic layer adsorption and reaction (SILAR) method with variation cycles ranging from 1 to 7. when the thickness of the CdSe_0.3S_0.7 quantum dots is modified, the quantum dot sensitized solar cell with TiO₂ NPs/CdSe_0.3S_0.7(5c)/ZnS photoanode shows higher short circuit current density (J_SC), open circuit voltage (V_OC) and power conversion efficiency (PCE) values of 17.80 mA/cm², 530 mV and 3.25 %, respectively. The corresponding photoelectrode according to the results of Surface morphology analyses is still suitable for loading other quantum dots, because there are still large pores on the surface. The CdSe QDs were loaded using the Chemical Bath Deposition (CBD) technique at various times from 6 to 15 min' coverage of TiO₂ NPs/CdSe_0.3S_0.7 photoanode. The optimal thickness of the CdSe layer causes its energy levels to be aligned with the other layers and allowing photogenerated carriers to move between bands with a strong driving force before recombination. The cell with the TiO₂NPs/CdSe_0.3S_0.7(5 cycles)/CdSe(12min)/ZnS photoelectrode has the highest J_SC, V_OC and PCE values of 24.70 mA/cm², 580 mV and 6.25 %, respectively. The efficiency increased by 92 % compared to the reference cell, which only included CdSe0.3S0.7 QDs, and the IPCE and APCE curves had higher intensities and spanned a wider range of visible wavelengths. These changes are the result of enhanced light harvesting efficiency.

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.