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Reduced Recombination Losses in Evaporated Perovskite Solar Cells by Postfabrication Treatment

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Reduced Recombination Losses in Evaporated Perovskite Solar Cells by Postfabrication Treatment

dc.contributor.author	Kiermasch, David
dc.contributor.author	Fischer, Mathias
dc.contributor.author	Gil Escrig, Lidón
dc.contributor.author	Baumann, Andreas
dc.contributor.author	Bolink, Henk
dc.contributor.author	Dyakonov, Vladimir
dc.contributor.author	Tvingstedt, Kristofer
dc.date.accessioned	2022-03-24T15:46:29Z
dc.date.available	2022-03-24T15:46:29Z
dc.date.issued	2021
dc.identifier.citation	Kiermasch, David Fischer, Mathias Gil Escrig, Lidón Baumann, Andreas Bolink, Henk Dyakonov, Vladimir Tvingstedt, Kristofer 2021 Reduced Recombination Losses in Evaporated Perovskite Solar Cells by Postfabrication Treatment Solar Rrl 5 11 2100400
dc.identifier.uri	https://hdl.handle.net/10550/82034
dc.description.abstract	The photovoltaic perovskite research community has now developed a large set of tools and techniques to improve the power conversion efficiency (PCE). One such arcane trick is to allow the finished devices to dwell in time, and the PCE often improves. Herein, a mild postannealing procedure is implemented on coevaporated perovskite solar cells confirming a substantial PCE improvement, mainly attributed to an increased open-circuit voltage (V OC). From a V OC of around 1.11 V directly after preparation, the voltage improves to more than 1.18 V by temporal and thermal annealing. To clarify the origin of this annealing effect, an in-depth device experimental and simulation characterization is conducted. A simultaneous reduction of the dark saturation current, the ideality factor (n id), and the leakage current is revealed, signifying a substantial impact of the postannealing procedure on recombination losses. To investigate the carrier dynamics in more detail, a set of transient optoelectrical methods is first evaluated, ascertaining that the bulk carrier lifetime is increased with device annealing. Second, a drift-diffusion simulation is used, confirming that the beneficial effect of the annealing has its origin in effective bulk trap passivation that accordingly leads to a reduction of Shockley-Read-Hall recombination rates.
dc.language.iso	eng
dc.relation.ispartof	Solar Rrl, 2021, vol. 5, num. 11, p. 2100400
dc.subject	Cèl·lules fotoelèctriques
dc.subject	Materials
dc.title	Reduced Recombination Losses in Evaporated Perovskite Solar Cells by Postfabrication Treatment
dc.type	journal article	es_ES
dc.date.updated	2022-03-24T15:46:29Z
dc.identifier.doi	10.1002/solr.202100400
dc.identifier.idgrec	148350
dc.rights.accessRights	open access	es_ES