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Structurally nanocrystalline-electrically single crystalline ZnO-reduced graphene oxide composites

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Title
Structurally nanocrystalline-electrically single crystalline ZnO-reduced graphene oxide composites
Author(s)
Nam, Woo Hyun; Kim, Bo Bae; Seo, Seul Gi; Lim, Young Soo; Kim, Jong-Young; Seo, Won-Seon; Choi, Won Kook; Park, Hyung-Ho; Jeong Yong Lee
Publication Date
2014-09
Journal
NANO LETTERS, v.14, no.9, pp.5104 - 5109
Publisher
AMER CHEMICAL SOC
Abstract
ZnO, a wide bandgap semiconductor, has attracted much attention due to its multifunctionality, such as transparent conducting oxide, light-emitting diode, photocatalyst, and so on. To improve its performances in the versatile applications, numerous hybrid strategies of ZnO with graphene have been attempted, and various synergistic effects have been achieved in the ZnO−graphene hybrid nanostructures. Here we report extraordinary charge transport behavior in Al-doped ZnO (AZO)-reduced graphene oxide (RGO)nanocomposites. Although the most challenging issue in semiconductor nanocomposites is their low mobilities, the AZO−RGO nanocomposites exhibit single crystal-like Hall mobility despite the large quantity of nanograin boundaries, which hinder the electron transport by the scattering with trapped charges. Because of the significantly weakened grain boundary barrier and the proper band alignment between the AZO and RGO, freely conducting electrons across the nanograin boundaries can be realized in the nanocomposites. This discovery of the structurally nanocrystallineelectrically single crystalline composite demonstrates a new route for enhancing the electrical properties in nanocomposites based on the hybrid strategy.
URI
https://pr.ibs.re.kr/handle/8788114/898
ISSN
1530-6984
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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