HAT-CN-Modified Spiro-OMeTAD Realizes Efficient Perovskite Solar Cells
Hole transport materials are essential for facilitating the movement of holes between the perovskite layer and the electrode. Spiro-OMeTAD (2,2′,7,7′-tetrakis (N,N-di-p-methoxyphenylamine) 9,9′-spirobifluorene) is extensively utilized as a hole transport material among various alternatives. However, spiro-OMeTAD itself has a short plate with a low hole mobility and low conductivity. We report a perovskite solar cell of n-i-p type with HAT-CN-modified spiro-OMeTAD as a hole transport layer, while HAT-CN exhibits metalloid properties. The Fermi level of the hole transport layer is shifted downward, which promotes the migration of holes from the perovskite layer to the spiro-OMeTAD hole transport layer. The HAT-CN buffer layer reduces the roughness of the spiro-OMeTAD film, thereby improving the surface contact between the hole transport layer and metal electrode. The power conversion efficiency of the device, which was modified with a HAT-CN buffer layer on the spiro-OMeTAD layer, increased from 20.45 to 21.65%. Additionally, the hysteresis index decreased from 15.99 to 11.37% and the device stability improved. This strategy effectively enhances both the charge carrier mobility and hydrophobicity of the spiro-OMeTAD layer, thereby facilitating the achievement of efficient and stable perovskite solar cells.
Authors
- Yaohua Mai (ORCID: https://orcid.org/0000-0002-3795-361X)
- Jian Yu (ORCID: https://orcid.org/0000-0001-6824-064X)
- Yixian Li
- Zhuowei Du
- Kuan Sun (ORCID: https://orcid.org/0000-0002-6391-5270)
- Shanyue Hou
- Yi Chen (ORCID: https://orcid.org/0000-0003-3081-8770)
- Xiaoxiao Zhang (ORCID: https://orcid.org/0000-0001-8478-5877)
- Yanlin Li (ORCID: https://orcid.org/0000-0003-3014-1042)
- Qian Zhang (ORCID: https://orcid.org/0000-0003-1453-8437)
- Yan Xiang (ORCID: https://orcid.org/0000-0002-0710-262X)
- Wei You (ORCID: https://orcid.org/0000-0003-0354-1948)
- Qiang Yang (ORCID: https://orcid.org/0000-0003-2665-6633)
- Wenfeng Zhang (ORCID: https://orcid.org/0000-0002-9223-4220)
- Wei Long (ORCID: https://orcid.org/0009-0008-7512-5656)
- Zheng Xiao (ORCID: https://orcid.org/0009-0000-9272-3481)
- Zhangfeng Huang (ORCID: https://orcid.org/0000-0002-3390-9347)
- Zhu Ma (ORCID: https://orcid.org/0000-0002-7418-6069)
- Junbo Yang (ORCID: https://orcid.org/0000-0001-8290-7244)
- Hao Du (ORCID: https://orcid.org/0000-0003-0949-8178)
- Cheng Huang (ORCID: https://orcid.org/0000-0003-4757-5074)
- Fuchun Gou
- Hong Yu
Institutions
- Chongqing University (CN)
- Jinan University (CN)
- Southwest Petroleum University (CN)
- Beijing Solar Energy Research Institute (CN)
Publication Details
- Journal
- ACS Applied Energy Materials
- Published
- 2024-12-31
- DOI
- https://doi.org/10.1021/acsaem.4c02180
- Citations
- 6
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.25
Funders
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
- Sichuan Province Science and Technology Support Program