Improving ambient stability of BiI 3 -based perovskites using different phosphoniums as the organic cation
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Research Letter
Improving ambient stability of BiI3-based perovskites using different phosphoniums as the organic cation Diana F. Garcia-Gutierrez, Universidad Autónoma de Nuevo León, UANL, Fac. de Ciencias Químicas, FCQ, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México; Universidad Autónoma de Nuevo León, UANL, Fac. de Ingeniería Mecánica y Eléctrica, FIME, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México; Universidad Autónoma de Nuevo León, UANL, División de Estudios de Posgrado FCQ, Guerrero y Progreso S/N, Col. Treviño, Monterrey, Nuevo León, C.P. 64570, México Domingo I. Garcia-Gutierrez, Universidad Autónoma de Nuevo León, UANL, Fac. de Ingeniería Mecánica y Eléctrica, FIME, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México Diego González-Quijano, Universidad Autónoma de Nuevo León, UANL, Fac. de Ciencias Químicas, FCQ, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México; Universidad Autónoma de Nuevo León, UANL, División de Estudios de Posgrado FCQ, Guerrero y Progreso S/N, Col. Treviño, Monterrey, Nuevo León, C.P. 64570, México Itzel A. Abarca-Villarreal and Sofia F. Galindo-Garza, Universidad Autónoma de Nuevo León, UANL, Fac. de Ciencias Químicas, FCQ, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México Eduardo M. Sanchez, Universidad Autónoma de Nuevo León, UANL, Fac. de Ciencias Químicas, FCQ, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66450, México; Universidad Autónoma de Nuevo León, UANL, División de Estudios de Posgrado FCQ, Guerrero y Progreso S/N, Col. Treviño, Monterrey, Nuevo León, C.P. 64570, México Address all correspondence to Eduardo M. Sanchez at [email protected] (Received 9 February 2018; accepted 17 April 2018)
Abstract Perovskites solar cells have reached impressive efficiencies (22%) in recent years. Because certain environmental concerns are raised by the use of lead halides, there is an interest to seek out lead-free alternatives, featuring bismuth or antimony. Alongside, one of the major drawbacks displayed by MAPbI3 is their low stability at ambient conditions. In this work, (RP4)xBiyIz were synthesized, using different types of tetraalkylphosphoniums (R4PI) were R = ethyl, butyl, hexyl, and octyl, to assess their stability. Afterwards, they were characterized to study their morphology and crystal structure, as well as their optical properties.
Introduction Perovskite solar cells are now positioned among the most researched topics in recent years, due to the increment in their power conversion efficiency, which has improved from 10% to over 22% in the last 7 years.[1] Among the materials most frequently reported for this application, the lead halides (PbI2, PbCl) combined with methyl ammonium iodide (MAI) can be found.[2–4] The perovskites structures formed combining this organic cation and the lead hal
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