采用叠合式石墨烯电极的新型Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 钙钛矿太阳能电池研究

马聪聪; 边继明; 陈冉升

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Perovskite Solar Cells with Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 Light Harvesting Layer and Stacking Graphene Electrode

首发时间：2020-04-01

MA Congcong ^{1
2}
Ma Congcong(1995-), male, master, Perovskite Solar Cells
BIAN Jiming ³
Bian Jiming(1973-), male, professor, Perovskite photoelectric devices. E-mail: jmbian@dlut.edu.cn
Chen Ransheng ³

1、School of microelectronics, Dalian University of Technology, 116024
2、school of physics, dalian university of technology, 116024
3、School of physics, Dalian University of Technology, 116024

Abstract：Recently, perovskite solar cells (PSCs) have gained more and more concern for its high power conversion efficiency (PCE) and low manufacturing cost. However, the stability of PSCs is still far from satisfactory and hinders its commercialization. In this work, we fabricate carbon-based perovskite solar cells (C-PSCs) with mixed-cation lead mixed-halide perovskite absorber (Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3) and stacking graphene electrode to achieve high efficiency and excellent stability. The efficiency of C-PSCs reaches 16.2%. The stacking graphene electrodes are formed by low-cost and facile spray approaches. Stability of C-PSCs in humid environment is improved benefiting from the hydrophobic nature of carbon materials. Meanwhile, perovskite containing Cs+ monovalent inorganic cation also contributes to the photochemical stability. Electrochemical impedance spectroscopy (EIS) and J-V curve are measured and precise models are built to analyze the photogeneration and carrier transport properties of C-PSCs and Au electrode PSCs (Au-PSCs). J-V plot fitting shows lower ideal factor and dark saturate current density for C-PSCs, which indicates fine interfacial contact and less nonradiative recombination centers. However, due to the sparse contact of two detached semi-cells connected by graphene, the series resistance of C-PSCs extracted from the EIS model is higher than Au-PSCs. Moreover, the \'parallel-plate capacitor\' like stacking electrode architecture impacts a lot in low frequency region of EIS curves.

keywords： C-PSCs graphene stacking cesium J-V EIS

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采用叠合式石墨烯电极的新型Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 钙钛矿太阳能电池研究

马聪聪 ¹
Ma Congcong(1995-), male, master, Perovskite Solar Cells
边继明 ²
Bian Jiming(1973-), male, professor, Perovskite photoelectric devices. E-mail: jmbian@dlut.edu.cn
陈冉升 ²

1、大连理工大学微电子学院，116024
2、大连理工大学物理学院，116024

摘要：近年来钙钛矿太阳能电池以高光电转换效率、低成本等优势吸引了学术界的目光。然而，PSCs的稳定性依旧不尽如人意，妨碍着它的商业化。在这里，我们采用以混合离子钙钛矿Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3为光吸收层的C-PSCs。在保持较高效率的同时增强了器件的稳定性。电池采用平面叠合式架构，即两个有碳电极的半电池叠合以此提高碳电极的性能。以廉价而简单的喷涂工艺制备的石墨烯碳电极以其疏水性提高了C-PSCs的湿度稳定性。同时，含Cs的钙钛矿材料也提高了光稳定性，并提高了光电转换效率。EIS和J-V曲线测试被用来分析C-PSCs的光生载流子、载流子输运等性质。通过碳电极电池与金电极电池的对比，我们发现C-PSCs的理想因子和饱和暗电流较小，这表明C-PSCs界面接触处理得非常好，并且非辐射复合中心也少。然而，由于通过石墨烯相连的两个半电池连接疏松，C-PSCs拟合出的串联电阻要比Au-PSCs大。同时，"平行板电容器"式的叠合式电极结构对EIS曲线的低频区影响很大，使得低频区半圆半径减小。

关键词： C-PSCs 石墨烯叠合式掺Cs J-V EIS

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MA Congcong,BIAN Jiming,Chen Ransheng. Perovskite Solar Cells with Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 Light Harvesting Layer and Stacking Graphene Electrode[EB/OL]. Beijing:Sciencepaper Online[2020-04-01]. https://www.paper.edu.cn/releasepaper/content/202004-6.

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论文编号	202004-6
论文题目	采用叠合式石墨烯电极的新型Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 钙钛矿太阳能电池研究
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