Stabilization of hybrid perovskite CH3NH3PbI3 thin films by graphene passivation
We report the long-term stability of water-sensitive hybrid perovskites CH3NH3PbI3 that were protected with monolayer graphene. This successful passivation was enabled by our development of a new water-free and polymer-free graphene transfer method. Monolayer graphene samples grown by plasma-enhance...
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| Veröffentlicht in: | Nanoscale 2017-12, Vol.9 (48), p.19227-19235 |
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| container_issue | 48 |
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| container_title | Nanoscale |
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| creator | Wei-Shiuan Tseng Meng-Huan Jao Chen-Chih Hsu Jing-Shun Huang Wu, Chih-I N-C Yeh |
| description | We report the long-term stability of water-sensitive hybrid perovskites CH3NH3PbI3 that were protected with monolayer graphene. This successful passivation was enabled by our development of a new water-free and polymer-free graphene transfer method. Monolayer graphene samples grown by plasma-enhanced chemical vapor deposition and transferred onto different substrates with the water/polymer-free method were found to preserve their high-quality characteristics after the transfer, as manifested by the studies of Raman, X-ray and ultraviolet photoemission spectroscopy (XPS and UPS), optical absorption, and sheet resistance. Additionally, XPS, UPS and optical absorption studies of fully graphene-covered CH3NH3PbI3 thin films showed spectral invariance even after 3 months, which was in sharp contrast to the drastic spectral changes after merely one week in control CH3NH3PbI3 samples without graphene protection. This successful demonstration of the graphene-enabled passivation and long-term stability of CH3NH3PbI3 thin films therefore opens up a new pathway towards realistic photovoltaic applications of hybrid perovskites. |
| doi_str_mv | 10.1039/c7nr06510h |
| format | Article |
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This successful passivation was enabled by our development of a new water-free and polymer-free graphene transfer method. Monolayer graphene samples grown by plasma-enhanced chemical vapor deposition and transferred onto different substrates with the water/polymer-free method were found to preserve their high-quality characteristics after the transfer, as manifested by the studies of Raman, X-ray and ultraviolet photoemission spectroscopy (XPS and UPS), optical absorption, and sheet resistance. Additionally, XPS, UPS and optical absorption studies of fully graphene-covered CH3NH3PbI3 thin films showed spectral invariance even after 3 months, which was in sharp contrast to the drastic spectral changes after merely one week in control CH3NH3PbI3 samples without graphene protection. 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| fulltext | fulltext |
| identifier | ISSN: 2040-3364 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals |
| subjects | Absorption Graphene Monolayers Passivity Perovskites Photoelectric emission Plasma enhanced chemical vapor deposition Polymers Protective coatings Stability Substrates Thin films X ray photoelectron spectroscopy |
| title | Stabilization of hybrid perovskite CH3NH3PbI3 thin films by graphene passivation |
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