Fabrication and characterization of FTO/C–TiO2/M-TiO2/CH3NH3PbI3/Spiro-MeOTAD/Au perovskite solar cell: Effect of moisture on stability and study of noise spectroscopy

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-04-02 DOI:10.1016/j.optmat.2025.117016

Amrit Kumar Mishra , Vijay Kumar Mishra , Rajesh Kumar Shukla

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Abstract

This study reports the fabrication of an FTO/C–TiO₂/M-TiO₂/CH₃NH₃PbI₃/Spiro-MeOTAD/Au perovskite solar cell and investigates its stability under various environmental conditions. The degraded perovskite layer is shown to be recoverable under high humidity in dark conditions. A 15 % RH nitrogen (N₂) flow effectively removes oxygen (O₂) and water (H₂O) molecules from the Spiro-MeOTAD/perovskite interface, enabling rapid recovery of the interface and enhancing the device's current density. The perovskite material exhibits temperature-dependent stability, achieving an efficiency of 20.24 % at 300 K with a fill factor of 86.88 %, J_SC of 24.77 mA/cm², and V_OC of 0.94 V. High humidity induces trap states, lowering the photocurrent, whereas low humidity stabilizes the material. The 1/f noise measurements reveal critical insights into defect states in the perovskite layer: high humidity correlates with reduced noise, while low humidity leads to increased noise levels. The effects of humidity, temperature, UV light, and white light on defect states are further analyzed using 1/f noise spectra and I–V characteristics under white light illumination and dark conditions.

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FTO/C-TiO2/M-TiO2/CH3NH3PbI3/Spiro-MeOTAD/Au 包晶太阳能电池的制造和表征：水分对稳定性的影响以及噪声光谱研究

本研究报告了 FTO/C-TiO2/M-TiO2/CH3NH3PbI3/Spiro-MeOTAD/Au 包晶太阳能电池的制作过程，并研究了其在各种环境条件下的稳定性。结果表明，在黑暗条件下的高湿度条件下，降解的透辉石层是可以恢复的。15% RH 的氮气 (N2) 流能有效去除斯派罗-MeOTAD/过氧化物晶体界面上的氧气 (O2) 和水分子 (H2O)，使界面迅速恢复，并提高了器件的电流密度。这种过氧化物材料表现出与温度相关的稳定性，在 300 K 时效率达到 20.24%，填充因子为 86.88%，JSC 为 24.77 mA/cm2，VOC 为 0.94 V。1/f 噪声测量揭示了透辉石层缺陷状态的关键信息：高湿度与噪声降低相关，而低湿度则导致噪声水平升高。在白光照明和黑暗条件下，利用 1/f 噪声频谱和 I-V 特性进一步分析了湿度、温度、紫外线和白光对缺陷状态的影响。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.