Solution processed vertically stacked ZnO sheet-like nanorod p-n homojunctions and their application as UV photodetectors

Won Bae Ko, Sang Hyo Lee, No Soung Myoung, Jin Pyo Hong

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

One long-standing goal in the development of one-dimensional nanostructured electronic devices is to facilitate the ongoing trend of miniaturization so as to enable ultralow power operation. Zinc oxide (ZnO) nanostructures, which have a direct and wide bandgap, are a central component in numerous electronic and optoelectronic applications. Here, we address vertically stacked ZnO sheet-like nanorod (SLNR) p-n homojunctions composed of single-crystalline undoped (n-type) and Li-doped (p-type) ZnO SLNRs by a multi-step solution-based hydrothermal route. Precise control of the molar concentration represented one of the basic factors in ensuring that the p-n homojunctions possessed appropriate densities and suitable morphologies. An extensive analysis of the luminescence features was carried out in order to identify p-type conduction in the Li-doped ZnO SLNRs. In addition, the SLNR-based p-n homojunctions exhibited distinct electrical features that validated their potential use as ultraviolet photodetectors, thereby spurring progress in the development of practical optoelectronics.

Original languageEnglish
Pages (from-to)142-149
Number of pages8
JournalJournal of Materials Chemistry C
Volume4
Issue number1
DOIs
StatePublished - 2015 Jan 1

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Zinc Oxide
Photodetectors
Zinc oxide
Nanorods
Optoelectronic devices
Luminescence
Nanostructures
Energy gap
Crystalline materials

Cite this

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abstract = "One long-standing goal in the development of one-dimensional nanostructured electronic devices is to facilitate the ongoing trend of miniaturization so as to enable ultralow power operation. Zinc oxide (ZnO) nanostructures, which have a direct and wide bandgap, are a central component in numerous electronic and optoelectronic applications. Here, we address vertically stacked ZnO sheet-like nanorod (SLNR) p-n homojunctions composed of single-crystalline undoped (n-type) and Li-doped (p-type) ZnO SLNRs by a multi-step solution-based hydrothermal route. Precise control of the molar concentration represented one of the basic factors in ensuring that the p-n homojunctions possessed appropriate densities and suitable morphologies. An extensive analysis of the luminescence features was carried out in order to identify p-type conduction in the Li-doped ZnO SLNRs. In addition, the SLNR-based p-n homojunctions exhibited distinct electrical features that validated their potential use as ultraviolet photodetectors, thereby spurring progress in the development of practical optoelectronics.",
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Solution processed vertically stacked ZnO sheet-like nanorod p-n homojunctions and their application as UV photodetectors. / Ko, Won Bae; Lee, Sang Hyo; Myoung, No Soung; Hong, Jin Pyo.

In: Journal of Materials Chemistry C, Vol. 4, No. 1, 01.01.2015, p. 142-149.

Research output: Contribution to journalArticle

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