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Applications of ZnO–Nanocarbon Core–Shell Hybrid Quantum Dots

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Part of the book series: SpringerBriefs in Applied Sciences and Technology ((BRIEFSNANOSCIENCE))

Abstract

In ZnO–graphene (–C60) based UV photovoltaic devices, the maximum PCE of 3.02 % for ZnO–C60 is greater than that of 2.33 % for ZnO–graphene QDs, which can be ascribed to difference in the energy level alignment of C60 and graphene with poly-TPD (hole transport layer) and Cs2CO3/Al(electron transport layer). The ZnO–graphene quantum-dot layer LED pixels shows uniform luminescence with the maximum blue luminance of 798 cd/m2 at 15 V. In the photoelectrochemical devices, the rate constant for ZnO was only 0.0088 and slightly increased to 0.053 for ZnO–graphene. ZnO–C60 shows a k value more than 10-times higher than that of bare ZnO because of the higher charge transportation property of ZnO–C60. The normalized photocurrent density to time curves demonstrate that the ZnO–graphene core–shell structures have more improved long-term stability performance than those of ZnO–C60 because 2-Dim graphene can conformally cover the surface of the ZnO QD core better than 0-Dim C60 can.

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Correspondence to Won Kook Choi .

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Choi, W.K. (2017). Applications of ZnO–Nanocarbon Core–Shell Hybrid Quantum Dots. In: ZnO-Nanocarbon Core-Shell Type Hybrid Quantum Dots. SpringerBriefs in Applied Sciences and Technology(). Springer, Singapore. https://doi.org/10.1007/978-981-10-0980-8_3

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  • DOI: https://doi.org/10.1007/978-981-10-0980-8_3

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-0979-2

  • Online ISBN: 978-981-10-0980-8

  • eBook Packages: EngineeringEngineering (R0)

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