Journal Article

PUBDB-2025-04403

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png KCl-Mediated Defect Passivation in Vapor-Deposited Perovskites

Held, V. (Corresponding author)Extern* ; Mrkyvkova, N. (Corresponding author)Extern*XFEL.EU* ; Halahovets, Y. ; Nádaždy, P.Extern* ; Vegso, K.Extern* ; Vlk, A.Extern* ; Ledinský, M.Extern* ; Chumakov, A.DESY* ; Schwartzkopf, M.DESY* ; Schreiber, F.Extern* ; Siffalovic, P.Extern*

2025
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsami.5c09426  doi:10.3204/PUBDB-2025-04403

Abstract: Perovskite-based solar cells (PSCs) have reached efficiencies comparable to those of commonly used silicon solar panels. Despite the promise of PSCs, their efficiency and commercial viability are currently restricted by three main factors: nonradiative charge recombinations on defects occurring within the light-absorbing layer and at its boundaries, limited reproducibility, and upscaling due to widely employed wet deposition methods. To address these issues, we investigated the defect passivation strategy by introducing potassium salt (KCl) during perovskite vapor deposition. We observed effective passivation of the defects upon KCl addition, manifested as an immediate and significant enhancement of the real-time photoluminescence (PL) intensity. The efficiency of passivation is related to the ionic nature of the potassium salt and its flux density. On the other hand, the perovskite’s crystallographic structure and texture, as observed from the grazing-incidence wide/small-angle X-ray scattering measurements, showed no significant changes due to KCl doping. Our work provides valuable insight into the possible passivation routes for the vapor-deposited perovskite layers, with implications for various chemical compositions or architectures.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. OSCARS - O.S.C.A.R.S. - Open Science Clusters’ Action for Research and Society (101129751) (101129751)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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