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Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cells

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Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cells

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dc.contributor.author	Ávila, Jorge
dc.contributor.author	La Placa, Maria-Grazia
dc.contributor.author	Longhi, Elena
dc.contributor.author	Sessolo, Michele
dc.contributor.author	Barlow, Stephen
dc.contributor.author	Marder, Seth R.
dc.contributor.author	Bolink, Henk
dc.date.accessioned	2020-05-05T08:04:23Z
dc.date.available	2020-10-30T05:45:06Z
dc.date.issued	2019
dc.identifier.citation	Ávila, Jorge La Placa, Maria-Grazia Longhi, Elena Sessolo, Michele Barlow, Stephen Marder, Seth R. Bolink, Henk 2019 Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cells Journal Of Materials Chemistry a 7 45 25796 25801
dc.identifier.uri	https://hdl.handle.net/10550/74203
dc.description.abstract	Electron-transport materials such as fullerenes are widely used in perovskite solar cells to selectively transfer the photogenerated electrons to the electrodes. In order to minimize losses at the interface between the fullerene and the electrode, it is important to reduce the energy difference between the transport level of the two materials. A common approach to reduce such energy mismatch is to increase the charge carrier density in the semiconductor through doping. A variety of molecular dopants have been reported to reduce (n-dope) fullerenes. However, most of them are either difficult to process or extremely air sensitive, with most n-dopants leading to the formation of undesirable side products. Dimers formed by 19-electron organometallic sandwich compounds combine strong reducing ability, clean reactivity, and moderate air stability, while being processable both from solution and in vacuum. In this work, we have investigated the use of pentamethylcyclopentadienyl mesitylene ruthenium dimer, (RuCpmes)2, as a dopant for C60 in fully vacuum-deposited n-i-p perovskite solar cells. The (RuCpmes)2 was either co-evaporated with the fullerene or deposited as a pure thin film on top of the transparent electrode prior to the deposition of the fullerene. It was found that both the co-evaporated blends and the bilayers are effective electron-transport layers, leading to solar cells with efficiencies up to 18%.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Materials Chemistry a, 2019, vol. 7, num. 45, p. 25796-25801
dc.subject	Materials
dc.subject	Semiconductors
dc.title	Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cells
dc.type	journal article	es_ES
dc.date.updated	2020-05-05T08:04:24Z
dc.identifier.doi	10.1039/C9TA09838K
dc.identifier.idgrec	135090
dc.embargo.terms	1 year
dc.rights.accessRights	open access	es_ES