From Bulk to Surface Passivation: Double Role of Chlorine-Doping for Boosting Efficiency of FAPbI<inf>3</inf>-rich Perovskite Solar Cells
Authors
Larini, V
Degani, M
Pica, G
Ding, C
Andaji-Garmaroudi, Z
Faini, F
Stranks, SD
Ma, CQ
Publication Date
2022Journal Title
Solar RRL
ISSN
2367-198X
Publisher
Wiley
Language
en
Type
Article
This Version
AO
VoR
Metadata
Show full item recordCitation
Larini, V., Degani, M., Pica, G., Ding, C., Andaji-Garmaroudi, Z., Faini, F., Stranks, S., et al. (2022). From Bulk to Surface Passivation: Double Role of Chlorine-Doping for Boosting Efficiency of FAPbI<inf>3</inf>-rich Perovskite Solar Cells. Solar RRL https://doi.org/10.1002/solr.202200038
Description
Funder: Green flexible hybrid perovskite solar module for the market: from smart lead manipulation to recycling; Grant(s): FLHYPER, 20201067
Abstract
Defect‐mediated recombination losses limit the open‐circuit voltage (VOC) of perovskite solar cells (PSCs), negatively affecting the device's performance. Bulk and dimensional engineering have both been reported as promising strategies to passivate shallow defects, thus improving the photovoltaic conversion efficiency (PCE). Here, a combined bulk and surface treatment employing chlorine‐based compounds is employed. Methylammonium chloride (MACl) is used as a bulk additive, while 4‐methylphenethylammonium chloride (MePEACl) is deposited onto the perovskite surface to produce a low‐dimensional perovskite (LDP) and reduce nonradiative recombination. Through structural and morphological investigations, it can be confirmed that bulk and surface doping have a beneficial effect on the film morphology and its overall quality, while electroluminescence (EL) and photoluminescence (PL) analyses demonstrate an increased and more homogeneous emission. Applying this double passivation strategy in PSC fabrication, a boost is observed in both the short‐circuit current density and the VOC of the devices, achieving a champion 21.4% PCE while improving device stability.
Keywords
Research Article, Research Articles, 3D/2D perovskites, Cl-doping, FAPbI3, perovskite solar cells, PL imaging perovskite, surface passivation
Sponsorship
European Research Council (756962)
Engineering and Physical Sciences Research Council (EP/R023980/1)
Identifiers
solr202200038
External DOI: https://doi.org/10.1002/solr.202200038
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335735
Rights
Licence:
http://creativecommons.org/licenses/by-nc-nd/4.0/
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