Thiophene Cation Intercalation to Improve Band-Edge Integrity in Reduced-Dimensional Perovskites.

Ni, Chuyi; Huang, Yahao; Zeng, Tao; Chen, Daohong; Chen, Hao; Wei, Mingyang; Johnston, Andrew; Proppe, Andrew H; Ning, Zhijun; Sargent, Edward H; Hu, Peng; Yang, Zhenyu

Ni, Chuyi; Huang, Yahao; Zeng, Tao; Chen, Daohong; Chen, Hao; Wei, Mingyang; Johnston, Andrew; Proppe, Andrew H; Ning, Zhijun; Sargent, Edward H; Hu, Peng; Yang, Zhenyu.

Afiliación

Ni C; MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China.
Huang Y; MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China.
Zeng T; Department of Chemistry, York University, Toronto, Ontario, M3J1P3, Canada.
Chen D; Department of Chemistry, Carleton University, Ottawa, K1S5B6, Ontario, Canada.
Chen H; MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China.
Wei M; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
Johnston A; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China.
Proppe AH; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
Ning Z; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
Sargent EH; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
Hu P; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China.
Yang Z; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.

Angew Chem Int Ed Engl ; 59(33): 13977-13983, 2020 Aug 10.

Article en En | MEDLINE | ID: mdl-32383242

ABSTRACT

ABSTRACT

The insertion of large organic cations in metal halide perovskites with reduced-dimensional (RD) crystal structures increases crystal formation energy and regulates the growth orientation of the inorganic domains. However, the power conversion performance is curtailed by the insulating nature of the bulky cations. Now a series of RD perovskites with 2-thiophenmethylammonium (TMA) as the intercalating cation are investigated. Compared with traditional ligands, TMA demonstrates improved electron transfer in the inorganic framework. TMA modifies the near-band-edge integrity of the RD perovskite, improving hole transport. A power conversion efficiency of 19 % is achieved, the highest to date for TMA-based RD perovskite photovoltaics; these TMA devices provide a 12 % relative increase in PCE compared to control RD perovskite devices that use PEA as the intercalating ligand, a result of the improved charge transfer from the inorganic layer to the organic ligands.

Palabras clave

density functional theory; perovskites; reduced dimensionality; solar cells; thiophene

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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2020 Tipo del documento: Article País de afiliación: China