https://scholars.lib.ntu.edu.tw/handle/123456789/498028
Title: | Stabilization of hybrid perovskite CH<inf>3</inf>NH<inf>3</inf>PbI<inf>3</inf> thin films by graphene passivation | Authors: | Tseng, W.-S. Jao, M.-H. Hsu, C.-C. Huang, J.-S. Wu, C.-I. Yeh, N.-C. CHIH-I WU |
Issue Date: | 2017 | Journal Volume: | 9 | Journal Issue: | 48 | Start page/Pages: | 19227-19235 | Source: | Nanoscale | Abstract: | 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. © 2017 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/498028 | DOI: | 10.1039/c7nr06510h | SDG/Keyword: | Electromagnetic wave absorption; Graphene; Lead compounds; Light absorption; Monolayers; Passivation; Perovskite; Perovskite solar cells; Photoelectron spectroscopy; Plasma CVD; Plasma enhanced chemical vapor deposition; Vapor deposition; Water absorption; X ray photoelectron spectroscopy; Different substrates; Long term stability; Optical absorption studies; Photovoltaic applications; Spectral change; Spectral invariances; Transfer method; Ultraviolet photoemission spectroscopy; Thin films |
Appears in Collections: | 電機工程學系 |
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