Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells

Abstract Wide band-gap perovskite solar cells have the potential for a relatively high output voltage and resilience in a degradation-inducing environment. Investigating the reasons why high voltages with adequate output power have not been realized yet is an underexplored part in perovskite researc...

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Autores principales:	Parnian Ferdowsi, Efrain Ochoa-Martinez, Sandy Sanchez Alonso, Ullrich Steiner, Michael Saliba
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f8b6830f0b4745e380cc606e8a683f78
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spelling	oai:doaj.org-article:f8b6830f0b4745e380cc606e8a683f782021-12-02T13:34:01ZUltrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells10.1038/s41598-020-79348-12045-2322https://doaj.org/article/f8b6830f0b4745e380cc606e8a683f782020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79348-1https://doaj.org/toc/2045-2322Abstract Wide band-gap perovskite solar cells have the potential for a relatively high output voltage and resilience in a degradation-inducing environment. Investigating the reasons why high voltages with adequate output power have not been realized yet is an underexplored part in perovskite research although it is of paramount interest for multijunction solar cells. One reason is interfacial carrier recombination that leads to reduced carrier lifetimes and voltage loss. To further improve the Voc of methylammonium lead tri-bromide (MAPbBr3), that has a band-gap of 2.3 eV, interface passivation technique is an important strategy. Here we demonstrate two ultrathin passivation layers consisting of PCBM and PMMA, that can effectively passivate defects at the TiO2/perovskite and perovskite/spiro-OMeTAD interfaces, respectively. In addition, perovskite crystallization was investigated with the established anti-solvent method and the novel flash infrared annealing (FIRA) with and without passivation layers. These modifications significantly suppress interfacial recombination providing a pathway for improved VOC’s from 1.27 to 1.41 V using anti solvent and from 1.12 to 1.36 V using FIRA. Furthermore, we obtained more stable devices through passivation after 140 h where the device retained 70% of the initial performance value.Parnian FerdowsiEfrain Ochoa-MartinezSandy Sanchez AlonsoUllrich SteinerMichael SalibaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Parnian Ferdowsi Efrain Ochoa-Martinez Sandy Sanchez Alonso Ullrich Steiner Michael Saliba Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
description	Abstract Wide band-gap perovskite solar cells have the potential for a relatively high output voltage and resilience in a degradation-inducing environment. Investigating the reasons why high voltages with adequate output power have not been realized yet is an underexplored part in perovskite research although it is of paramount interest for multijunction solar cells. One reason is interfacial carrier recombination that leads to reduced carrier lifetimes and voltage loss. To further improve the Voc of methylammonium lead tri-bromide (MAPbBr3), that has a band-gap of 2.3 eV, interface passivation technique is an important strategy. Here we demonstrate two ultrathin passivation layers consisting of PCBM and PMMA, that can effectively passivate defects at the TiO2/perovskite and perovskite/spiro-OMeTAD interfaces, respectively. In addition, perovskite crystallization was investigated with the established anti-solvent method and the novel flash infrared annealing (FIRA) with and without passivation layers. These modifications significantly suppress interfacial recombination providing a pathway for improved VOC’s from 1.27 to 1.41 V using anti solvent and from 1.12 to 1.36 V using FIRA. Furthermore, we obtained more stable devices through passivation after 140 h where the device retained 70% of the initial performance value.
format	article
author	Parnian Ferdowsi Efrain Ochoa-Martinez Sandy Sanchez Alonso Ullrich Steiner Michael Saliba
author_facet	Parnian Ferdowsi Efrain Ochoa-Martinez Sandy Sanchez Alonso Ullrich Steiner Michael Saliba
author_sort	Parnian Ferdowsi
title	Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
title_short	Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
title_full	Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
title_fullStr	Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
title_full_unstemmed	Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
title_sort	ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/f8b6830f0b4745e380cc606e8a683f78
work_keys_str_mv	AT parnianferdowsi ultrathinpolymericfilmsforinterfacialpassivationinwidebandgapperovskitesolarcells AT efrainochoamartinez ultrathinpolymericfilmsforinterfacialpassivationinwidebandgapperovskitesolarcells AT sandysanchezalonso ultrathinpolymericfilmsforinterfacialpassivationinwidebandgapperovskitesolarcells AT ullrichsteiner ultrathinpolymericfilmsforinterfacialpassivationinwidebandgapperovskitesolarcells AT michaelsaliba ultrathinpolymericfilmsforinterfacialpassivationinwidebandgapperovskitesolarcells
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Ultrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells

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