Impact of CsPbI3 incorporation on the structural, optical, and electrical properties of mixed-halide perovskite solar cells

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2025-05-17 DOI:10.1007/s10971-025-06782-w

Ali Mujtaba, M. I. Khan, Mayra Mushtaq, Badriah S. Almutairi, Safa Ezzine

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引用次数: 0

Abstract

This study presents a novel approach to enhancing the performance of CsPbIBr₂ perovskite solar cells by incorporating 10% CsPbI₃ via spray coating. X-ray diffraction (XRD) confirms the α-cubic crystal structure, with improved crystallinity and increased crystallite size from 33.4 nm (pure) to 39.9 nm (modified), reducing dislocation line density (8.97 × 10¹⁴ to 6.28 × 10¹⁴ m⁻²). Optical analysis shows a bandgap reduction from 2.13 eV to 2.04 eV, enhancing light absorption and charge transport. Dielectric properties also improve, with the real dielectric constant increasing from 11.74 to 11.93. The modified perovskite film exhibits stronger PL intensity than the pure film, indicating reduced non-radiative recombination. Electrochemical impedance spectroscopy (EIS) indicates a significant reduction in charge transfer resistance (R_ct) from 103.27 Ω to 29.61 Ω, with increased recombination resistance (R_rec) from 5597.13 Ω to 5877.44 Ω, leading to superior charge transport. The modified perovskite solar cell exhibits superior performance, achieving an increased short-circuit current density (10.73 to 12.92 mA/cm²) and power conversion efficiency (10.48% to 12.91%) as confirmed by current density voltage (JV) measurement. Electrochemical impedance spectroscopy reveals reduced charge transfer resistance, improving electron mobility and suppressing recombination. These advancements highlight the potential of modified perovskites in high-efficiency photovoltaics.

Graphical Abstract

With the incorporation of CsPbI₃, the modified perovskite-based device showed the PCE upto 12.91%.

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CsPbI3掺入对混合卤化物钙钛矿太阳能电池结构、光学和电学性能的影响

本研究提出了一种通过喷涂加入10% CsPbI3来提高CsPbIBr2钙钛矿太阳能电池性能的新方法。x射线衍射（XRD）证实了α-立方晶体结构，结晶度提高，晶粒尺寸从33.4 nm（纯）增加到39.9 nm（改性），位错线密度从8.97 × 1014降低到6.28 × 1014 m−2。光学分析表明，带隙从2.13 eV减小到2.04 eV，增强了光吸收和电荷输运。介电性能也有所改善，实际介电常数由11.74提高到11.93。改性后的钙钛矿膜表现出比纯膜更强的PL强度，表明非辐射复合减少。电化学阻抗谱（EIS）表明，复合材料的电荷转移电阻（Rct）从103.27 Ω显著降低到29.61 Ω，复合电阻（Rrec）从5597.13 Ω显著增加到5877.44 Ω。经电流密度电压（JV）测量，改性后的钙钛矿太阳能电池性能优异，短路电流密度（10.73 ~ 12.92 mA/cm2）和功率转换效率（10.48% ~ 12.91%）均有所提高。电化学阻抗谱显示电荷转移电阻降低，电子迁移率提高，复合抑制。这些进展突出了改性钙钛矿在高效光伏电池中的潜力。在CsPbI3的掺入下，改进后的钙钛矿基器件的PCE高达12.91%。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.