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나노카본과 반도체나노입자로 형성된 나노복합소재의 광전소자 응용 연구
손동익 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Recently, carbon nanomaterials has attracted due to countless investigations into its remarkable electrical properties, opening up a new research area for materials science including for a diverse ranging and exiting potential applications. Hybrid nanostructures that combine inorganic materials and graphene are being developed for applications such as fuel cells, batteries, photovoltaics and sensors. However, there have never been demonstrations of light emission from such hybrids with curved single-layer graphene. Here we employ a simple solution method to prepare emissive hybrid quantum dots consisting of a ZnO core wrapped in a shell of single-layer graphene, and use these quantum dots to make a white light-emitting diode. The intermediate consolidated metal oxide@graphene core@shell QD is a kind of newly developed material which will be appropriate for a functional layer acting as an electron transport layer with high mobility in the field of such as DSSC, photovoltaic devices, sensor, lithium ion batteries (LIBs), photodetector, photocatalyst, and light emitting diode etc.
Hybrid semiconductor nanoparticles/carbon nanomaterials and their applications
손동익 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Hybrid nanostructures that combine inorganic materials and graphene are being developed for applications such as fuel cells, batteries, photovoltaics and sensors. However, there have never been demonstrations of light emission from such hybrids with curved single-layer graphene. Here we employ a simple solution method to prepare emissive hybrid quantum dots consisting of a ZnO core wrapped in a shell of singlelayer graphene, and use these quantum dots to make a white light-emitting diode. The intermediate consolidated metal oxide@graphene core@shell QD is a kind of newly developed material which will be appropriate for a functional layer acting as an electron transport layer with high mobility in the field of such as DSSC, photovoltaic devices, sensor, lithium ion batteries (LIBs), photodetector, photocatalyst, photoelectrochemical cell (PEC) and light emitting diode etc.
손동익,Son, Dong Ick 한국진공학회 2017 진공 이야기 Vol.4 No.4
Quantum structures containing nanoparticles have attracted much attention because of their promising potential applications in electronic and optoelectronic devices operating at lower currents and higher temperatures. The quantum dot is a particle of matter so small that the addition or removal of an electron changes its properties in some useful way. The Quantum dots typically have dimensions measured in nanometers, where one nanometer is 10-9 meter or a millionth of a millimeter. The emission and absorption spectra corresponding to the energy band gap of the quantum dot is governed by quantum confinement principles in an infinite square well potential. The energy band gap increases with a decrease in size of the quantum dot. In this review paper, we will discuss the quantum dot and their application.
손동익,노영수,Su Youn Kim,오도현,Won Tae Kim,김태환 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.5
ZnO nanoparticles were formed on Al2O3 (0001) substrates by using a spin coating and thermal treatment method. Scanning electron microscopy images showed that ZnO nanoparticles were formed on the Al2O3 substrates. X-ray diffraction patterns showed that ZnO nanoparticles annealed at 350 and 450 ˚C had a strong c-axis orientation and that those annealed at 550 ˚C had various orientations. Photoluminescence spectra for the ZnO nanoparticles formed on Al2O3 substrates showed that the dominant emission peak related to the band edge transitions was shifted to higher energy with increasing annealing temperature. X-ray photoelectron spectroscopy profiles showed O 1s and the Zn 2p peaks corresponding to the ZnO nanoparticles. ZnO nanoparticles were formed on Al2O3 (0001) substrates by using a spin coating and thermal treatment method. Scanning electron microscopy images showed that ZnO nanoparticles were formed on the Al2O3 substrates. X-ray diffraction patterns showed that ZnO nanoparticles annealed at 350 and 450 ˚C had a strong c-axis orientation and that those annealed at 550 ˚C had various orientations. Photoluminescence spectra for the ZnO nanoparticles formed on Al2O3 substrates showed that the dominant emission peak related to the band edge transitions was shifted to higher energy with increasing annealing temperature. X-ray photoelectron spectroscopy profiles showed O 1s and the Zn 2p peaks corresponding to the ZnO nanoparticles.
고요한,손동익 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.10
We report on the in-situ chemical growth of unique core-shell quantum dots (QDs) with single layer graphene on the surfaces of the Mn3O4 QDs and on their structural, optical and electrical properties. The Mn3O4-graphene QDs were synthesized through a simple hydrothermal technique. In order to enhance performance for electrochemical energy storage, we developed core (active material) - shell (conductive material)-type Mn3O4 - graphene QDs as electrode materials by using an aqueous electrolyte (6M KOH). As a result, the performance of electrochemical energy storage exhibit a specific capacitance of 452.72 Fg−1 at a current density of 1 Ag−1.