KSCN改性的PEDOT:PPS层用于制备纯锡基钙钛矿太阳能电池

赵煦; 钟守登; 王姝琪; 李少珍; 吴素娟

doi:10.1007/s12613-023-2738-y

Volume 30 Issue 12

Dec. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(12): 2451-2458

Xu Zhao, Shoudeng Zhong, Shuqi Wang, Shaozhen Li, and Sujuan Wu, Potassium thiocyanate additive for PEDOT:PSS layer to fabricate efficient tin-based perovskite solar cells, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2451-2458. https://doi.org/10.1007/s12613-023-2738-y

Cite this article as:

Xu Zhao, Shoudeng Zhong, Shuqi Wang, Shaozhen Li, and Sujuan Wu, Potassium thiocyanate additive for PEDOT:PSS layer to fabricate efficient tin-based perovskite solar cells, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2451-2458. https://doi.org/10.1007/s12613-023-2738-y

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研究论文

KSCN改性的PEDOT:PPS层用于制备纯锡基钙钛矿太阳能电池

1)
武汉轻工大学电气与电子工程学院 , 武汉 430023
2)
华南师范大学华南先进光电子研究院, 广州 510006

* 共同第一作者

通讯作者:
李少珍 E-mail: origen2003@whpu.edu.cn

吴素娟 E-mail: sujwu@scnu.edu.cn

文章亮点

1)系统研究了适量KSCN添加对采用1∶1体积比的水稀释的PEDOT:PSS溶液制备的空穴层微结构及光电性能的影响。

2）开发了光电性能优异的PEDOT:PSS层，并用于制备纯锡基的钙钛矿太阳能电池，对比研究了电池的光电性能及稳定性。

3）探讨了基于适量KSCN添剂PEDOT:PSS层电池光电性能优异的作用机理。

中文摘要

在锡基钙钛矿太阳能电池中（Sn-PSCs），商业化PEDOT:PSS溶液常被直接用来制备空穴传导层（HTLs）。但是由于PEDOT:PSS原液的酸性比较强，对电池的稳定性不利。尽管可以通过加水来稀释PEDOT:PSS溶液，减小PEDOT:PSS 空穴传导层的酸性，减低其成本。但是稀释后PEDOT:PSS溶液制备的空穴传导层，电导率急剧降低，对应电池光电转换效率显著下降。因此，碱性硫氰酸钾（KSCN）被用来调控稀释后PEDOT:PSS溶液制备空穴传导的光电性能。研制光电性优异的PEDOT:PSS基空穴传导层，力图制备稳定、高效的Sn-PSCs。在本项工作中，系统研究了KSCN添加剂的引入对PEDOT:PSS 层及其上制备钙钛矿层的微结构与光电性能的影响。研究发现，在最优KSCN浓度下，基于KSCN修饰PEDOT:PSS空穴传导层的纯锡基钙钛矿太阳能电池(KSCN-PSCs)的光电转换效率达到了8.39%，而对应基于无KSCN添加剂、未经稀释的PEDOT:PSS原液体制备的PEDOT:PSS HTLs电池的光电转换效率仅为6.7%。研究结果显示，KSCN的添加提高了基于稀释后PEDOT:PSS溶液制备PEDOT:PSS空穴传导层的电导率，改善了其上面制备的钙钛矿层的微结构，抑制了电池中的载流子复合，减小了电池的电滞回效应，提高KSCN-PSCs电池的光电光电转换效率与稳定性。本项研究工作的开展，为发展通过PEDOT:PSS稀溶液来获得Sn-PSCs用的低成本、高质量PEDOT:PSS空穴传导层提供了切实可行的思路。

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Research Article

Potassium thiocyanate additive for PEDOT:PSS layer to fabricate efficient tin-based perovskite solar cells

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Abstract

Abstract

The commercialized poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) is usually used as hole transport layers (HTLs) in tin-based perovskite solar cells (TPSCs). However, the further development has been restricted due to the acidity that could damage the stability of TPSCs. Although the PEDOT:PSS solution can be diluted by water to decrease acidity and reduce the cost of device fabrication, the electrical conductivity will decrease obviously in diluted PEDOT:PSS solution. Herein, potassium thiocyanate (KSCN) is selected to regulate the properties of PEDOT:PSS HTLs from the diluted PEDOT:PSS aqueous solution by water with a volume ratio of 1:1 to prepare efficient TPSCs. The effect of KSCN addition on the structure and photoelectrical properties of PEDOT:PSS HTLs and TPSCs have been systematically studied. At the optimal KSCN concentration, the TPSCs based on KSCN-doped PEDOT:PSS HTLs (KSCN-PSCs) demonstrate the champion power conversion efficiency (PCE) of 8.39%, while the reference TPSCs only show a champioan PCE of 6.70%. The further analysis demonstrates that the KSCN additive increases the electrical conductivity of HTLs prepared by the diluted PEDOT:PSS solution, improves the microstructure of perovskite film, and inhibits carrier recombination in TPSCs, leading to the reduced hysteresis effect and enhanced PCE in KSCN-PSCs. This work gives a low-cost and practical strategy to develop a high-quality PEDOT:PSS HTLs from diluted PEDOT:PSS aqueous solution for efficient TPSCs.
- potassium thiocyanate;
- diluted PEDOT:PSS solution;
- tin-based perovskite solar cells;
- photovoltaic performance

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