3-吡啶基硫脲添加剂对钙钛矿太阳能电池性能的影响

doi:10.16552/j.cnki.issn1001-1625.2025.0506

摘要/Abstract

摘要： 钙钛矿太阳能电池因优异的光电性能而备受关注,但光电转换效率(PCE)和稳定性不足限制了其商业化应用。本研究引入3-吡啶基硫脲(3-PTU)作为添加剂,制备了正置平面结构钙钛矿太阳能电池,以探究3-PTU对钙钛矿薄膜质量和光伏性能的影响。采用一步旋涂法制备钙钛矿薄膜,利用X射线衍射、扫描电子显微镜、紫外-可见吸收光谱、光致发光光谱和电流密度-电压曲线等方法对薄膜和器件进行表征。结果表明:经3-PTU添加剂处理的钙钛矿薄膜结晶度提高,晶粒尺寸增大,同时疏水性增强,非辐射复合缺陷态减少;相应光伏器件PCE从22.46%提升至23.75%,开路电压从1.17 V提高到1.21 V,迟滞效应可忽略不计。

关键词: 3-吡啶基硫脲, 钙钛矿太阳能电池, 结晶度, 光伏性能, 稳定性, 缺陷态

Abstract: Perovskite solar cells are of great interest due to their excellent optoelectronic properties, yet their commercialization is restricted by insufficient power conversion efficiency (PCE) and stability. This study introduced 3-pyridylthiourea (3-PTU) as an additive in the fabrication of planar-structured perovskite solar cells to evaluate its impact on the quality of perovskite films and the photovoltaic performance of cells. Perovskite films were fabricated via a one-step spin-coating method. A suite of characterization techniques, including X-ray diffraction, scanning electron microscopy, ultraviolet-visible absorption spectroscopy, photoluminescence spectroscopy, and current density-voltage curve measurements, were employed to analyze the films and devices. The results indicate that the addition of 3-PTU notably enhances the crystallinity of the perovskite films, leading to enlarged grain size, improved hydrophobicity, and a reduction in non-radiative recombination defect states. Consequently, devices treated with 3-PTU demonstrate an increase in PCE from 22.46% to 23.75%, a rise in open-circuit voltage from 1.17 V to 1.21 V, and negligible hysteresis effects.

Key words: 3-pyridyl thiourea, perovskite solar cell, crystallinity, photovoltaic performance, stability, defect state

中图分类号:

TM914.4

刘有, 路润麟, 胡嘉乐, 陈俊明. 3-吡啶基硫脲添加剂对钙钛矿太阳能电池性能的影响[J]. 硅酸盐通报, 2025, 44(8): 3061-3068.

LIU You, LU Runlin, HU Jiale, CHEN Junming. Effect of 3-Pyridyl Thiourea Additive on Performance of Perovskite Solar Cells[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 3061-3068.

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