Study on photovoltaic stability and performance by incorporating tetrabutyl phosphonium iodide into the active layer of a perovskite type photovoltaic cell

Edgar González-Juárez; Karen Valadez-Villalobos; Diana F Garcia-Gutierrez; Domingo I Garcia-Gutierrez; Arian Espinosa Roa; Eduardo Sanchez

doi:10.1039/d0ra04630b

Study on photovoltaic stability and performance by incorporating tetrabutyl phosphonium iodide into the active layer of a perovskite type photovoltaic cell

RSC Adv. 2020 Aug 25;10(52):31575-31585. doi: 10.1039/d0ra04630b. eCollection 2020 Aug 21.

Authors

Edgar González-Juárez¹, Karen Valadez-Villalobos¹, Diana F Garcia-Gutierrez², Domingo I Garcia-Gutierrez², Arian Espinosa Roa³, Eduardo Sanchez¹

Affiliations

¹ Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, FCQ, Av. Universidad s/n, Cd. Universitaria San Nicolás de los Garza Nuevo León C. P. 66450 Mexico eduardo.sanchezcv@uanl.edu.mx.
² Universidad Autónoma de Nuevo León, UANL, Facultad de Ingeniería Mecánica y Eléctrica, FIME, Av. Universidad s/n, Cd. Universitaria San Nicolás de los Garza Nuevo León C. P. 66450 Mexico.
³ CONACyT-Centro de Investigación en Química Aplicada, Unidad Monterrey, Parque de Innovación e Investigación Tecnológica (PIIT) Alianza Sur, No. 204 C. P. 66628 Apodaca Nuevo León Mexico.

Abstract

A simple synthesis of an ionic liquid is carried out using a trialkylphosphine and an alkyl halide. The results showed that the quality of perovskite crystals is enhanced by the incorporation of B₄PI, when the percentage is 1.5% the PCE of champion PSCs MA_98.5(B₄PI)_1.5PbI₃ increases significantly from 15.5%, with a V _OC of 0.957 mV, J _SC of 23.6 mA cm^-2, and an FF of 68.4%. Stability tests show that excess B₄PI by 20% has a protective effect against humidity, MA₈₀(B₄PI)₂₀PbI₃ was more stable towards humidity, losing only 20% efficiency for 200 h.