Journal
CARBON
Volume 108, Issue -, Pages 335-342Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.07.032
Keywords
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Funding
- IIT Kharagpur
- DST, Govt. of India [IFA13-MS-09]
- DST-FIST
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We report on the white luminescence from heterojunctions based on two dimensional (2D) graphitic carbon nitride (g-C3N4) nanosheets and ZnO nanorods. Nanorods wrapped with nanosheets have been grown using a simple aqueous solution growth method, where the atomistic attachment between g-C3N4 and ZnO leads to the formation of an isotype heterojunction with type-II band alignment. Microscopic studies have indicated the growth of a few layer g-C3N4 using chemical exfoliation. In contrast to the layered structures of g-C3N4 and ZnO, the heterojunction has been found to be efficient to yield the broad emission features. The heterojunction facilitates the violet-blue emission through charge transfer, while the interfacial recombination yields emission in the extreme end of the visible range. The intermixing of individual emission features from g-C3N4 and ZnO along with the interfacial radiative recombination is responsible for the origin of white light emission. The study indicates the potential of 2D/1D heterojunctions to achieve tailored emission characteristics for light emitting applications. (C) 2016 Elsevier Ltd. All rights reserved.
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