Unveiling the effect of potassium treatment on the mesoporous TiO.sub.2./sub./ perovskite interface in perovskite solar cells

Amalathas, A.P.; Landová, Lucie; Ridzoňová, Katarína; Horák, L.; Bauerová, P.; Holovský, Jakub

doi:https://dx.doi.org/10.1021/acsaem.1c02229

Number of the records: 1

Unveiling the effect of potassium treatment on the mesoporous TiO.sub.2./sub./ perovskite interface in perovskite solar cells

1.

SYSNO ASEP	0549982
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Unveiling the effect of potassium treatment on the mesoporous TiO₂/ perovskite interface in perovskite solar cells
Author(s)	Amalathas, A.P. (CZ) Landová, Lucie (FZU-D)_ORCID Ridzoňová, Katarína (FZU-D)_ORCID Horák, L. (CZ) Bauerová, P. (CZ) Holovský, Jakub (FZU-D)_{RID, ORCID}
Number of authors	6
Source Title	ACS Applied Energy Materials. - : American Chemical Society - ISSN 2574-0962 Roč. 4, č. 10 (2021), s. 11488-11495
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	perovskite solar cells ; mesoporous TiO₂ ; interface passivation ; sub-band-gap absorption ; nonradiative recombination
Subject RIV	BM - Solid Matter Physics ; Magnetism
OECD category	Condensed matter physics (including formerly solid state physics, supercond.)
Method of publishing	Limited access
Institutional support	FZU-D - RVO:68378271
UT WOS	000711236300108
EID SCOPUS	85118175023
DOI	10.1021/acsaem.1c02229
Annotation	A method for improving mesoporous TiO2/perovskite interfacial characteristics in perovskite solar cells (PSCs) is demonstrated by modifying mesoporous TiO2 with potassium (K) treatment. It is found that the modification of mesoporous TiO2 with K treatment enhances the perovskite crystallization process, producing a perovskite film with higher crystallinity and larger grains. K treatment passivates trap sites in mesoporous TiO2 and reduces sub-band-gap deep defect states at the interface of the perovskite, thereby suppressing the nonradiative recombination and improving Voc of PSCs. Stronger photoluminescence quenching and shorter carrier lifetime are also observed for the perovskite on K-treated mesoporous TiO2, indicating more efficient charge collection across the interface. As a result of these advancements, PSC based on K-treated mesoporous TiO2 shows a high power conversion efficiency of 20.60% compared to PSC without K treatment and improves the environmental stability in air.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2022
Electronic address	https://doi.org/10.1021/acsaem.1c02229

Number of the records: 1