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Highly Flexible, High-Performance Perovskite Solar Cells with Adhesion Promoted AuCl3-doped Graphene Electrodes
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- Authors
- Jin Hyuck Heo, Dong Hee Shin, Min Hyeok Jang, Myung Lae Lee, Man Gu Kang, Sang Hyuk Im
- Issue Date
- 2017-09
- Citation
- Journal of Materials Chemistry A : Materials for Energy and Sustainability, v.5, no.40, pp.21146-21152
- ISSN
- 2050-7488
- Publisher
- Royal Society of Chemistry (RSC)
- Language
- English
- Type
- Journal Article
- Abstract
- Super flexible TCO-free FAPbI3-xBrx planar type inverted perovskite solar cells with a 17.9% power conversion efficiency under 1 sun conditions were demonstrated by introducing an APTES (3-aminopropyl triethoxysilane) adhesion promoter between a PET flexible substrate and a AuCl3-doped single-layer graphene transparent electrode (TCE). Due to the formation of covalent bonds by the APTES inter-layer, the AuCl3-GR/APTES/PET substrate had excellent flexibility, whereas the AuCl3-GR/PET substrate and the ITO/PET substrate had significant degradation of the sheet resistance after a bending test due to the break-off or delamination of AuCl3-GR from the PET substrate and the cracking of ITO. Accordingly, the perovskite solar cells constructed on the AuCl3-GR/APTES/PET TCE substrate exhibited excellent bending stability and they maintained their PCE at over 90% of the initial value after 100 bending cycles at R ?돟 4 mm.