Novel pi-extended porphyrin-based hole-transporting materials with triarylamine donor units for high performance perovskite solar cells
- Authors
- Kang, Sung Ho; Lu, Chunyuan; Zhou, Haoran; Choi, Seungjoo; Kim, Jeongho; Kim, Hwan Kyu
- Issue Date
- 4월-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Perovskite solar cells; Porphyrins; Triarylamines; Donor bulkiness; Molecular arrangement; Hole transporting materials
- Citation
- DYES AND PIGMENTS, v.163, pp.734 - 739
- Indexed
- SCIE
SCOPUS
- Journal Title
- DYES AND PIGMENTS
- Volume
- 163
- Start Page
- 734
- End Page
- 739
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66435
- DOI
- 10.1016/j.dyepig.2018.12.065
- ISSN
- 0143-7208
- Abstract
- Efficient hole transporting materials (HTMs) for perovskite solar cells (PrSCs) is highly desired in emerging solar cell technologies. Three HTMs comprising a coplanar porphyrin core with different substituted electron donating triarylamine (TAA) groups (coded as SGT-061, SGT-062, and SGT-063) were successfully developed and used as HTMs for PrSCs. The porphyrin-based HTMs with more bulky donor groups (SGT-062 and SGT-063) possess the larger dihedral angle between alkoxy-substituted phenyl ring and the donor TAA core, leading to the greater interference for the dense molecular arrangement and reducing the pi-pi stacking of HTM molecules. But SGT-061 with a less bulky donor enables a tight molecular arrangement to increase the pi-pi stacking between molecules. This renders SGT-061 to have a higher hole mobility than that of SGT-062 and SGT-063 HTMs with bigger donor groups. Moreover, the dynamic charge transfer process of perovskite/various HTM films was studied by time-resolved photoluminescence decay. And SGT-061 exhibited more efficient hole extraction ability than that of SGT-062 and SGT-063. This could be ascribed to better hole mobility and better co-facial pi-pi stacking between molecules. These results indicate that a less bulky electron donor unit is a preferred peripheral group for developing porphyrin based HTMs for efficient perovskite solar cells.
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Collections - Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
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