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制备一个CeO₂球核结构及其在量子点敏感太阳能电池中的应用

Shusen Yang¹, Jie Sun¹, Chenxuan Dai¹

¹Hebei Key Lab of Optic-electronic Information and Materials, College of Physics Science and Technology, Hebei Provincial Photovoltaic Technology Collaborative Innovation Center, Hebei University, Baoding 071002, P. R. China. wmzhang@hbu.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|July 14, 2023

概括

一种新的二氧化 (CeO2) 散射层显著提高了量子点敏感太阳能电池的性能. 这种纳米结构改善了光吸收和电子产生,使整体效率提高了20%.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
可再生能源可再生能源是可再生能源.

背景情况:

薄膜光电子设备需要高效的光电极结构.
量子点敏化太阳能电池 (QDSSC) 提供了有前途的光伏应用.
改善光采集和电荷载体生成对于QDSSC效率至关重要.

研究的目的:

开发一种新的CeO2散射层,以提高QDSSC中的光电极性能.
为了研究散射层厚度对QD吸附和光利用的影响.
优化复合光电极结构,以提高光电转换效率 (PCE).

主要方法:

一个步骤的热水方法合成了类似石榴的CeO2纳米球.
CeO2纳米球被集成到TiO2膜上,以创建一个复合光电极散射层.
量子点敏感太阳能电池使用ZnCuInSe量子点,ZnS被动化和CuS计数电极组装.

主要成果:

CeO2散射层促进了对TiO2膜更有效的量子点吸附.
纳米结构的光散射特性增加了光电极内的光路长,增强了光电子的产生.
与裸体TiO2光电极相比,复合光电极表现出更高的光转换效率,在10 ± 1μm的散射层厚度下表现最佳.

结论:

类似石榴的CeO2纳米层结构在QDSSC中起到有效的散射层的作用.
优化散射层厚度对于最大限度地提高QDSSC的光电转换效率至关重要.
这种复合光电解极设计比传统的TiO2光电解极提供了20%的PCE改进.

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