Mahmoudi, Tahmineh, Rho, Won-Yeop, Kohan, Mohammadhosein, Im, Yeon Ho, Mathur, Sanjay and Hahn, Yoon-Bong (2021). Suppression of Sn2+/Sn4+ oxidation in tin-based perovskite solar cells with graphene-tin quantum dots composites in active layer. Nano Energy, 90. AMSTERDAM: ELSEVIER. ISSN 2211-3282
Full text not available from this repository.Abstract
Tin (Sn) halide perovskite has been a promising candidate in lead-free perovskite solar cells (PSCs), but its chemical instability attributed to Sn2+/Sn4+ oxidation reduces device performance and stability. To address this problem, we propose a new approach, i.e. fabrication of mesoporous n-i-p Sn-based PSCs with the photoactive composite made of mixed-organic-cation Sn halide perovskite and reduced graphene oxide (rGO) sheets anchored with Sn quantum dots (i.e., FA0.8MA0.2SnI3/rGO-Sn QDs). The rGO-Sn QDs in active layer not only suppress the destructive Sn2+/Sn4+oxidation and recombination but also accelerate charge transport, improve charge-carrier lifetime and reduce trap state density. Compared to the power conversion efficiency (PCE) of SnPSC without Sn QDs, the composite-basted champion device showed 55% increase in efficiency, attributed to strong suppression of Sn2+/Sn4+oxidation and recombination. Furthermore, the champion device showed remarkable reproducibility and stability improvement, representing an essential step for the practical use of lowcost and lead-free PSCs.
Item Type: | Journal Article | ||||||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-576053 | ||||||||||||||||||||||||||||
DOI: | 10.1016/j.nanoen.2021.106495 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Nano Energy | ||||||||||||||||||||||||||||
Volume: | 90 | ||||||||||||||||||||||||||||
Date: | 2021 | ||||||||||||||||||||||||||||
Publisher: | ELSEVIER | ||||||||||||||||||||||||||||
Place of Publication: | AMSTERDAM | ||||||||||||||||||||||||||||
ISSN: | 2211-3282 | ||||||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/57605 |
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