Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface Recombination
comunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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https://doi.org/10.1021/acsenergylett.9b00186 |
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Title
Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface RecombinationDate
2019-02-19ISSN
2380-8195Bibliographic citation
ARANDA, Clara; GUERRERO, Antonio; BISQUERT, Juan. Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface Recombination. ACS Energy Letters, 2019, vol. 4, no 3, p. 741-746Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/full/10.1021/acsenergylett.9b00186Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
The achievement of optimal power conversion efficiencies (PCEs) in wide-band-gap perovskite solar cells (PSCs) is delayed by photovoltage losses associated with poor understanding of recombination dynamics. In this ... [+]
The achievement of optimal power conversion efficiencies (PCEs) in wide-band-gap perovskite solar cells (PSCs) is delayed by photovoltage losses associated with poor understanding of recombination dynamics. In this work, we use high-quality methylammonium lead bromide perovskite solar cells with selective contacts treated with lithium-containing additives to investigate recombination mechanisms. By comparison of the photovoltaic performance of devices we confirm that the presence of this additive in the electron selective layer (ESL) significantly increases the open-circuit potential to values of 1.58 V. Impedance spectroscopy coupled with electroluminescence and photoluminescence analysis reveals that lithium ions present at the mesoporous TiO2 layer dramatically enhances the radiative recombination in the perovskite by reduction of undesired nonradiative and surface recombination pathways. This work highlights that the employ of additives helps to modify the electronic charge distribution at the metal oxide/perovskite interface to suppress undesired recombination mechanisms. [-]
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ACS Energy Letters, 2019, vol. 4, no 3Investigation project
Ministerio de Ciencia, Innovacion y Universidades of Spain: MAT2016-76892-C3-1-R; Ministry of Science and Innovation, Spain (MICINN): RYC-201416809; University Jaume I: UJI-B2017-32Rights
Copyright © American Chemical Society
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