2024-03-29T14:47:06Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1849052024-01-09T10:08:09Zcom_10234_160292com_10234_9col_10234_160293
Repositori UJI
author
Aranda Alonso, Clara
author
Guerrero, Antonio
author
Bisquert, Juan
2019-11-13T08:48:39Z
2019-11-13T08:48:39Z
2019-02-19
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. 741-746
2380-8195
http://hdl.handle.net/10234/184905
https://doi.org/10.1021/acsenergylett.9b00186
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.
eng
Copyright © American Chemical Society
perovskite
solar cells
methylammonium lead
Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface Recombination
info:eu-repo/semantics/article
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