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Park, Hyesung
Low-Dimensional Materials & Energy Conversion Lab
Research Interests
  • Nano materials, renewable energy, optoelectronic devices

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Suppressed Interdiffusion and Degradation in Flexible and Transparent Metal Electrode-Based Perovskite Solar Cells with a Graphene Interlayer

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Title
Suppressed Interdiffusion and Degradation in Flexible and Transparent Metal Electrode-Based Perovskite Solar Cells with a Graphene Interlayer
Author
Jeong, GyujeongKoo, DonghwanSeo, JihyungJung, SeungonChoi, YunseongLee, JunghyunPark, Hyesung
Issue Date
2020-05
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.20, no.5, pp.3718 - 3727
Abstract
Metal-based transparent conductive electrodes (TCEs) are attractive candidates for application in indium tin oxide (ITO)-free solar cells due to their excellent electrical conductivity and cost effectiveness. In perovskite solar cells (PSCs), metal-induced degradation with the perovskite layer leads to various detrimental effects, deteriorating the device performance and stability. Here, we introduce a novel flexible hybrid TCE consisting of a Cu grid-embedded polyimide film and a graphene capping layer, named GCEP, which exhibits excellent mechanical and chemical stability as well as desirable optoelectrical properties. We demonstrated the critical role of graphene as a protection layer to prevent metal-induced degradation and halide diffusion between the electrode and perovskite layer; the performance of the flexible PSCs fabricated with GCEP was comparable to that of their rigid ITO-based counterparts and also exhibited outstanding mechanical and chemical stability. This work provides an effective strategy to design mechanically and chemically robust ITO-free metal-assisted TCE platforms in PSCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/32357
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.0c00663
DOI
10.1021/acs.nanolett.0c00663
ISSN
1530-6984
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