Spiro‐Phenylpyrazole‐9,9′‐Thioxanthene Analogues as Hole‐Transporting Materials for Efficient Planar Perovskite Solar Cells
Abstract
Abstract Perovskite solar cells have emerged as a promising technique for low‐cost, light weight, and highly efficient photovoltaics. However, they still largely rely on 2,2′,7,7′‐tetrakis( N , N ‐di‐ p ‐methoxyphenylamine)‐9,9′‐spirobifluorene (Spiro‐OMeTAD) to serve as hole‐transporting materials (HTMs). Here, a series of HTMs with small molecular weight is designed, which are constructed on a spiro core involving phenylpyrazole and a second heteroaromatics, i.e., xanthene (O atom), thioxanthene (S atom), and acridine (N atom). Through varying from phenylpyrazole substituted xanthene ( PPyra‐XA ), thioxanthene ( PPyra‐TXA ), to acridine ( PPyra‐ACD ), their optical and electrochemical properties, hole mobilities, and the photovoltaic performance are optimized. As a consequence, PPyra‐TXA based device exhibits the highest power conversion efficiency (PCE) of 18.06%, outperforming that of Spiro‐OMeTAD (16.15%), which could be attributed to the enhancement of hole mobility exerted by the thioxanthene. In addition, the dopant‐free device shows PCE of 11.7%. These results open a new direction for designing spiro‐HTMs by simple modification of chemical structures.
- Authors:
-
[1]
- Department of Chemistry and Low Carbon Energy Research Center National Tsing Hua University Hsinchu 30013 Taiwan
- Department of Materials Science and Engineering and Department of Chemistry University of Washington Seattle WA 98195‐2120 USA
- Department of Materials Science and Engineering and Department of Chemistry University of Washington Seattle WA 98195‐2120 USA, Department of Biology and Chemistry City University of Hong Kong Kowloon 999077 Hong Kong
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1399053
- Grant/Contract Number:
- DE‐EE0006710
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Name: Advanced Energy Materials Journal Volume: 7 Journal Issue: 19; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Wang, Yang, Zhu, Zonglong, Chueh, Chu‐Chen, Jen, Alex K. ‐Y., and Chi, Yun. Spiro‐Phenylpyrazole‐9,9′‐Thioxanthene Analogues as Hole‐Transporting Materials for Efficient Planar Perovskite Solar Cells. Germany: N. p., 2017.
Web. doi:10.1002/aenm.201700823.
Wang, Yang, Zhu, Zonglong, Chueh, Chu‐Chen, Jen, Alex K. ‐Y., & Chi, Yun. Spiro‐Phenylpyrazole‐9,9′‐Thioxanthene Analogues as Hole‐Transporting Materials for Efficient Planar Perovskite Solar Cells. Germany. https://doi.org/10.1002/aenm.201700823
Wang, Yang, Zhu, Zonglong, Chueh, Chu‐Chen, Jen, Alex K. ‐Y., and Chi, Yun. Fri .
"Spiro‐Phenylpyrazole‐9,9′‐Thioxanthene Analogues as Hole‐Transporting Materials for Efficient Planar Perovskite Solar Cells". Germany. https://doi.org/10.1002/aenm.201700823.
@article{osti_1399053,
title = {Spiro‐Phenylpyrazole‐9,9′‐Thioxanthene Analogues as Hole‐Transporting Materials for Efficient Planar Perovskite Solar Cells},
author = {Wang, Yang and Zhu, Zonglong and Chueh, Chu‐Chen and Jen, Alex K. ‐Y. and Chi, Yun},
abstractNote = {Abstract Perovskite solar cells have emerged as a promising technique for low‐cost, light weight, and highly efficient photovoltaics. However, they still largely rely on 2,2′,7,7′‐tetrakis( N , N ‐di‐ p ‐methoxyphenylamine)‐9,9′‐spirobifluorene (Spiro‐OMeTAD) to serve as hole‐transporting materials (HTMs). Here, a series of HTMs with small molecular weight is designed, which are constructed on a spiro core involving phenylpyrazole and a second heteroaromatics, i.e., xanthene (O atom), thioxanthene (S atom), and acridine (N atom). Through varying from phenylpyrazole substituted xanthene ( PPyra‐XA ), thioxanthene ( PPyra‐TXA ), to acridine ( PPyra‐ACD ), their optical and electrochemical properties, hole mobilities, and the photovoltaic performance are optimized. As a consequence, PPyra‐TXA based device exhibits the highest power conversion efficiency (PCE) of 18.06%, outperforming that of Spiro‐OMeTAD (16.15%), which could be attributed to the enhancement of hole mobility exerted by the thioxanthene. In addition, the dopant‐free device shows PCE of 11.7%. These results open a new direction for designing spiro‐HTMs by simple modification of chemical structures.},
doi = {10.1002/aenm.201700823},
journal = {Advanced Energy Materials},
number = 19,
volume = 7,
place = {Germany},
year = {Fri Jun 09 00:00:00 EDT 2017},
month = {Fri Jun 09 00:00:00 EDT 2017}
}
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