安赛蜜修饰SnO2电子传输层对钙钛矿太阳能电池性能的影响

doi:10.15541/jim20250018

无机材料学报

• •

安赛蜜修饰SnO₂电子传输层对钙钛矿太阳能电池性能的影响

胡清豪¹, 刘兴翀¹, 彭永珊¹, 侯孟君¹, 何堂贵², 汤安民²

1.西南石油大学新能源与材料学院,成都 610500;
2.眉山琏升光伏科技有限公司,眉山 620200

收稿日期:2025-01-13 修回日期:2025-05-05
通讯作者: 刘兴翀, 副教授. E-mail: liuxingchong@126.com
作者简介:胡清豪(1998-), 女, 硕士研究生. E-mail: 2073147278@qq.com
基金资助:
四川省科技项目(2024ZDZX0030); 成都市科技项目(2024-JB00-00010-GX); 四川省产教融合示范项目（川财教[2022]106号）

Effect of Acesulfame Potassium Modified SnO₂ Electron Transport Layer on Performance of Perovskite Solar Cells

HU Qinghao¹, LIU Xingchong¹, PENG Yongshan¹, HOU Mengjun¹, HE Tanggui², TANG Anmin²

1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2025-01-13 Revised:2025-05-05
Contact: LIU Xingchong, associate professor. E-mail: liuxingchong@126.com
About author:HU Qinghao(1998-), female, Master candidate. E-mail: 2073147278@qq.com
Supported by:
Science and Technology Program (2024ZDZX0030); Chengdu Science and Technology Program (2024-JB00-00010-GX); Sichuan Demonstration Project for the Integration of Industry and Education (Chuan Cai Jiao [2022] No. 106)

摘要/Abstract

摘要： 作为钙钛矿太阳能电池(PSCs)的电子传输层(ETL)材料,二氧化锡表面及晶界处的氧空位缺陷会引发非辐射复合,从而限制器件效率的进一步提升。本研究提出了一种低成本、高效的安赛蜜(ACE-K)修饰ETL策略。研究结果表明,ACE-K分子中的C=O和S=O与SnO₂表面未配位Sn⁴⁺相互作用,显著钝化了二氧化锡的氧空位缺陷,薄膜电导率由4.60×10^⁻6 S cm^⁻1提升至6.23×10^⁻6 S cm^⁻1。同时安赛蜜修饰改善了二氧化锡薄膜的粗糙度(20.6 nm降低至14.0 nm)和润湿性,为钙钛矿薄膜生长提供了更优质的基底。基于此ETL生长的钙钛矿薄膜晶粒尺寸从970.90 nm增大到1071.20 nm,且薄膜吸光能力得到增强。空间限制电流(SCLC)测试发现优化后薄膜缺陷密度从4.84×10¹⁶ cm^-3降低至3.83×10¹⁶ cm^-3,电化学阻抗(EIS)测试也证实载流子输运过程中的非辐射复合得到了明显抑制。最终PSCs光电转换效率(PCE)从19.27%提升至21.60%。此外,未封装的ACE-K修饰器件在氮气氛围下储存2160 h后,仍能保持初始效率的91.67%,展现出优异的长期稳定性。

关键词: 二氧化锡, 钙钛矿太阳能电池, 修饰改性, 缺陷钝化, 安赛蜜

Abstract: The oxygen vacancy defects at the surface and grain boundaries of tin dioxide (SnO₂), an electron transport layer (ETL) material for perovskite solar cells (PSCs), can induce non-radiative recombination, thereby limiting further improvements in device efficiency. This study proposes a low-cost and efficient strategy for modifying the ETL using acesulfame potassium (ACE-K). The results demonstrate that the C=O and S=O groups in ACE-K molecules interact with the undercoordinated Sn⁴⁺ on the SnO₂ surface, significantly passivating the oxygen vacancy defects in SnO₂. The electrical conductivity of the film increased from 4.60×10^⁻6 S cm^-1 to 6.23×10^⁻6 S cm^-1. Moreover, ACE-K modification improved the roughness (reduced from 20.6 nm to 14.0 nm) and wettability of the SnO₂ film, providing a better substrate for perovskite film growth. Consequently, the perovskite films grown on this optimized ETL enlarged grain sizes from 970.90 nm to 1071.20 nm and enhanced light absorption capability. Space-charge-limited current (SCLC) measurements revealed that the defect density decreased from 4.84×10¹⁶ cm^-3 to 3.83×10¹⁶ cm^-3, while electrochemical impedance spectroscopy (EIS) confirmed a significant suppression of non-radiative recombination during charge carrier transport. Ultimately, the power conversion efficiency (PCE) of the PSCs improved from 19.27% to 21.60%. In addition, unpackaged ACE-K modified PSCs maintain 91.67% of initial PCE after 2160 h stored in N₂, showing excellent long term stablility.

Key words: Tin dioxide, perovskite solar cells, modification, defect passivation, acesulfame potassium

中图分类号:

TM914

胡清豪, 刘兴翀, 彭永珊, 侯孟君, 何堂贵, 汤安民. 安赛蜜修饰SnO₂电子传输层对钙钛矿太阳能电池性能的影响[J]. 无机材料学报, DOI: 10.15541/jim20250018.

HU Qinghao, LIU Xingchong, PENG Yongshan, HOU Mengjun, HE Tanggui, TANG Anmin. Effect of Acesulfame Potassium Modified SnO₂ Electron Transport Layer on Performance of Perovskite Solar Cells[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250018.

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安赛蜜修饰SnO₂电子传输层对钙钛矿太阳能电池性能的影响

Effect of Acesulfame Potassium Modified SnO₂ Electron Transport Layer on Performance of Perovskite Solar Cells

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