https://scholars.lib.ntu.edu.tw/handle/123456789/431909
標題: | Spiro-Phenylpyrazole-9,9?-Thioxanthene Analogues as Hole-Transporting Materials for Efficient Planar Perovskite Solar Cells | 作者: | Wang Y. Zhu Z. Chueh C.-C. Jen A.K.-Y. Chi Y. CHU-CHEN CHUEH |
關鍵字: | hole-transporting materials (HTMs); perovskite solar cells (PVSCs); phenylpyrazole; spiro-structures; thioxanthene | 公開日期: | 2017 | 出版社: | Wiley-VCH Verlag | 卷: | 7 | 期: | 19 | 來源出版物: | Advanced Energy Materials | 摘要: | 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. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020460212&doi=10.1002%2faenm.201700823&partnerID=40&md5=217584cc44fa138100dcd6764f8ada5b https://scholars.lib.ntu.edu.tw/handle/123456789/431909 |
ISSN: | 16146832 | DOI: | 10.1002/aenm.201700823 | SDG/關鍵字: | Atoms; Chemical modification; Perovskite; Perovskite solar cells; Solar cells; Solar power generation; Xanthenes; Heteroaromatics; Hole-transporting materials; phenylpyrazole; Photovoltaic performance; Power conversion efficiencies; Simple modifications; Spiro structure; Thioxanthene; Hole mobility |
顯示於: | 化學工程學系 |
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