In:
Small, Wiley, Vol. 10, No. 10 ( 2014-05), p. 2057-2066
Abstract:
We present a straightforward method for simultaneously enhancing the electrical conductivity, environmental stability, and photocatalytic properties of graphene films through one‐step transfer of CVD graphene and integration by introducing TiO 2 /graphene oxide layer. A highly durable and flexible TiO 2 layer is successfully used as a supporting layer for graphene transfer instead of the commonly used PMMA. Transferred graphene/TiO 2 film is directly used for measuring the carrier transport and optoelectronic properties without an extra TiO 2 removal and following deposition steps for multifunctional integration into devices because the thin TiO 2 layer is optically transparent and electrically semiconducting. Moreover, the TiO 2 layer induces charge screening by electrostatically interacting with the residual oxygen moieties on graphene, which are charge scattering centers, resulting in a reduced current hysteresis. Adsorption of water and other chemical molecules onto the graphene surface is also prevented by the passivating TiO 2 layer, resulting in the long term environmental stability of the graphene under high temperature and humidity. In addition, the graphene/TiO 2 film shows effectively enhanced photocatalytic properties because of the increase in the transport efficiency of the photogenerated electrons due to the decrease in the injection barrier formed at the interface between the F‐doped tin oxide and TiO 2 layers.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.201303541
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
2168935-0
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