title: Study of Arylamine-Substituted Porphyrins as Hole-Transporting Materials in High-Performance Perovskite Solar Cells.
abstract: To develop new hole-transporting materials (HTMs) for efficient and stable perovskite solar cells (PSCs), 5,10,15,20-tetrakis{4-[N,N-di(4-methoxylphenyl)amino-phenyl]}-porphyrin was prepared in gram scale through the direct condensation of pyrrole and 4-[bis(4-methoxyphenyl)amino]benzaldehyde. Its Zn(II) and Cu(II) complexes exhibit excellent thermal and electrochemical stability, specifically a high hole mobility and very favorable energetics for hole extraction that render them a new class of HTMs in organometallic halide PSCs. As expected, ZnP as HTM in PSCs affords a competitive power conversion efficiency (PCE) of 17.78%, which is comparable to that of the most powerful HTM of Spiro-MeOTAD (18.59%) under the same working conditions. Meanwhile, the metal centers affect somewhat the photovoltaic performances that CuP as HTM produces a lower PCE of 15.36%. Notably, the PSCs employing ZnP show a much better stability than Spiro-OMeTAD. Moreover, the two porphyrin-based HTMs can be prepared from relatively cheap raw materials with a facile synthetic route. The results demonstrate that ZnP and CuP can be a new class of HTMs for efficient and stable PSCs. To the best of our knowledge, this is the best performance that porphyrin-based solar cells could show with PCE > 17%.
authors.affiliation: Institute of Molecular Functional Materials, Research Centre of Excellence for Organic Electronics, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Song
authors.initials: S
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Hua
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Li
authors.forename: Lars
authors.identifier: http://orcid.org/0000-0002-0168-2942
authors.initials: L
authors.lastname: Kloo
authors.affiliation: College of Chemistry, Xiangtan University , Xiangtan 411105, Hunan Province, P. R. China.
authors.forename: Xingzhu
authors.initials: X
authors.lastname: Wang
authors.affiliation: Institute of Molecular Functional Materials, Research Centre of Excellence for Organic Electronics, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Beng
authors.identifier: http://orcid.org/0000-0001-7212-6612
authors.initials: B
authors.lastname: Ong
authors.affiliation: Institute of Molecular Functional Materials, Research Centre of Excellence for Organic Electronics, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Wai-Kwok
authors.initials: WK
authors.lastname: Wong
authors.affiliation: Institute of Molecular Functional Materials, Research Centre of Excellence for Organic Electronics, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University , Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
authors.forename: Xunjin
authors.identifier: http://orcid.org/0000-0001-7929-6964
authors.initials: X
authors.lastname: Zhu
keywords: arylamine substituents; hole mobility; hole-transporting material; perovskite solar cells; porphyrin