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FeCl(3) as a low-cost and efficient p-type dopant of Spiro-OMeTAD for high performance perovskite solar cells

Chemical doping is a viable tactic to improve the charge transporting properties of organic semiconductors in efficient perovskite solar cells. In this paper, we first employ the low-cost inorganic salt FeCl(3) as a chemical dopant to replace the traditional expensive cobalt complex for the oxidizat...

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Detalles Bibliográficos
Autores principales: Gu, Xiaoyu, Li, Yang, Mu, Yanfei, Zhang, Min, Lu, Tongbu, Wang, Peng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9078656/
https://www.ncbi.nlm.nih.gov/pubmed/35541882
http://dx.doi.org/10.1039/c8ra00243f
Descripción
Sumario:Chemical doping is a viable tactic to improve the charge transporting properties of organic semiconductors in efficient perovskite solar cells. In this paper, we first employ the low-cost inorganic salt FeCl(3) as a chemical dopant to replace the traditional expensive cobalt complex for the oxidization of 2,2′,7,7′-tetrakis(N,N-p-dimethoxyphenylamino)-9,9′-spirobifluorene (Spiro-OMeTAD), a typical organic hole-transporter. Based on the joint measurements of electron absorption spectra, cyclic voltammetry, and the hole-only device, we reveal that FeCl(3) can effectively oxidize Spiro-OMeTAD and improve the hole transporting properties of Spiro-OMeTAD. Through carefully optimizing the dopant concentration, solar cells with 80% FeCl(3) doped Spiro-OMeTAD achieve over 17% power conversion efficiency based on a triple cation perovskite photoactive layer, which is comparable to that of devices with a classical cobalt complex dopant. Our work demonstrates the potential of using FeCl(3) as a low-cost chemical dopant for hole-transporting materials in perovskite solar cells.