化工学报 ›› 2023, Vol. 74 ›› Issue (8): 3554-3563.DOI: 10.11949/0438-1157.20230347

• 能源和环境工程 • 上一篇    下一篇

F3EACl修饰层对钙钛矿太阳能电池性能提升的研究

傅予(), 刘兴翀(), 王瀚雨, 李海敏, 倪亚飞, 邹文静, 雷月, 彭永姗   

  1. 西南石油大学新能源与材料学院,四川 成都 610500
  • 收稿日期:2023-04-07 修回日期:2023-07-22 出版日期:2023-08-25 发布日期:2023-10-18
  • 通讯作者: 刘兴翀
  • 作者简介:傅予(1997—),男,硕士研究生,2429619769@qq.com
  • 基金资助:
    四川省自然科学基金项目(2022NSFSC0266);西南石油大学青年科技创新团队项目(2019CXTD04);西南石油大学科研启动项目(2019QHZ013);西南石油大学青年学者发展基金项目(201999010017)

Research on F3EACl modification layer for improving performance of perovskite solar cells

Yu FU(), Xingchong LIU(), Hanyu WANG, Haimin LI, Yafei NI, Wenjing ZOU, Yue LEI, Yongshan PENG   

  1. School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China
  • Received:2023-04-07 Revised:2023-07-22 Online:2023-08-25 Published:2023-10-18
  • Contact: Xingchong LIU

摘要:

一般来说,钙钛矿表面的陷阱和晶界(GBs)对钙钛矿太阳能电池(PSCs)的性能和长期稳定性非常不利。本研究用一种含有F原子的三氟乙胺盐酸盐(F3EACl)作为改性层,沉积在钙钛矿(PVSK)层和空穴传输层(HTL)之间,以钝化钙钛矿表面上的陷阱和GBs。通过对F3EACl修饰后钙钛矿薄膜结晶性、钙钛矿薄膜形貌、钙钛矿薄膜光物理性质以及电池光伏性能的研究发现,F3EACl与钙钛矿形成的N—H…F氢键作用以及F3EA+和钙钛矿中的I-之间的相互作用能够钝化钙钛矿表面的缺陷,从而提高器件的性能和稳定性。此外,F3EACl改性层还可以调节钙钛矿层与HTL之间的能级分布,进而提高空穴的提取效率。结果显示,F3EACl修饰后的PSCs的能量转换效率(PCE)从19.15%提高到22.45%。这表明F3EACl是一种用来钝化钙钛矿陷阱比较好的材料,可提升PSCs的性能和稳定性。

关键词: 钙钛矿太阳能电池, 界面, 缺陷钝化, 结晶, 太阳能

Abstract:

In general, traps and grain boundaries (GBs) on the perovskite surface are very detrimental to the performance and long-term stability of perovskite solar cells (PSCs). In this study, a trifluoroethylamine hydrochloride (F3EACl) containing F atoms was used as a modified layer deposited between the perovskite (PVSK) layer and the hole transport layer (HTL) to passivate the perovskite defects and GBs on the surface. Through the study of the crystallinity, morphology, photophysical properties, and photovoltaic performance of F3EACl modified perovskite films, it was found that the N—H … F hydrogen bonding between F3EACl and perovskite, as well as the interaction between F3EA+ and I- in perovskite, can passivate defects on the perovskite surface, thereby improving the performance and stability of the device. In addition, the F3EACl modified layer can also adjust the energy level distribution between the perovskite layer and the HTL, thereby improving the hole extraction efficiency. The results showed that the power conversion efficiency (PCE) of PSCs modified by F3EACl increased from 19.15% to 22.45%. This indicates that F3EACl is a better material to passivate perovskite traps to improve the performance and stability of PSCs.

Key words: perovskite solar cells, interface, defect passivation, crystallization, solar energy

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