25 Result(s)
within
Sohee Jeong
English
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Article
Open AccessNanosilver Colloids-Filled Photonic Crystal Arrays for Photoluminescence Enhancement
For the improved surface plasmon-coupled photoluminescence emission, a more accessible fabrication method of a controlled nanosilver pattern array was developed by effectively filling the predefined hole array...
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Article
Open AccessFacile synthesis of uniform large-sized InP nanocrystal quantum dots using tris(tert-butyldimethylsilyl)phosphine
Colloidal III-V semiconductor nanocrystal quantum dots [NQDs] have attracted interest because they have reduced toxicity compared with II-VI compounds. However, the study and application of III-V semiconductor...
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Article
Improvement of the quality of gluten-free rice pound cake using extruded rice flour
To improve the quality of gluten-free rice pound cake (GRPC), the ‘Hanarum’ extruded rice flours (HERFs) prepared with 250 rpm screw speed, 160°C barrel temperature, and 24 and 30% feed moisture of ‘Hanarum’ r...
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Article
Optical properties and carrier dynamics of CaSrSiO4:Eu3+ phosphors prepared by using the solid-state reaction method
The optical properties and the carrier dynamics of CaSrSiO4:Eu3+ phosphors synthesized by using a solid-state reaction method have been studied by means of scanning electron microscopy, X-ray diffraction, photolu...
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Article
Tandem intercalation strategy for single-layer nanosheets as an effective alternative to conventional exfoliation processes
Simple and effective generation of transition metal chalcogenides (TMCs) in a single-layer form has been a challenging task. Here we present a tandem molecular intercalation (TMI) as a new exfoliation concept ...
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Article
Open AccessContinuous Purification of Colloidal Quantum Dots in Large-Scale Using Porous Electrodes in Flow Channel
Colloidal quantum dots (QDs) afford huge potential in numerous applications owing to their excellent optical and electronic properties. After the synthesis of QDs, separating QDs from unreacted impurities in l...
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Article
Open AccessSupersonically Spray-Coated Colloidal Quantum Dot Ink Solar Cells
Controlling the thickness of quantum dot (QD) films is difficult using existing film formation techniques, which employ pre-ligand-exchanged PbS QD inks, because of several issues: 1) poor colloidal stability,...
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Article
Open AccessColloidal quantum dot based solar cells: from materials to devices
Colloidal quantum dots (CQDs) have attracted attention as a next-generation of photovoltaics (PVs) capable of a tunable band gap and low-cost solution process. Understanding and controlling the surface of CQDs...
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Article
Internal Friction of Austenitic Fe-Mn-C-Al Alloys
The internal friction (IF) spectra of Fe-Mn-C-Al alloys with a face-centered-cubic (fcc) austenitic phase were measured at a wide range of temperature and frequency (f) to understand the mechanisms of anelastic r...
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Article
Open AccessBroadband light trap** strategies for quantum-dot photovoltaic cells (>10%) and their issues with the measurement of photovoltaic characteristics
Bandgap tunability and broadband absorption make quantum-dot (QD) photovoltaic cells (PVs) a promising candidate for future solar energy conversion systems. Approaches to improving the electrical properties of...
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Article
A Review on Eco-Friendly Quantum Dot Solar Cells: Materials and Manufacturing Processes
Power conversion efficiencies of colloidal quantum dot solar cells, which have focused mainly on lead chalcogenide systems until recently, have increased rapidly and currently exceed 12%. Among the many issues...
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Article
Open AccessEnergy level tuned indium arsenide colloidal quantum dot films for efficient photovoltaics
We introduce indium arsenide colloidal quantum dot films for photovoltaic devices, fabricated by two-step surface modification. Native ligands and unwanted oxides on the surface are peeled off followed by pass...
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Article
Efficient hybrid colloidal quantum dot/organic solar cells mediated by near-infrared sensitizing small molecules
Solution-processed semiconductors are promising materials to realize optoelectronic devices that combine high performance with inexpensive manufacturing. In particular, the exploitation of colloidal quantum do...
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Chapter and Conference Paper
Analyzing Twitter Data of Family Caregivers of Alzheimer’s Disease Patients Based on the Depression Ontology
In this paper, we present an ontology-based approach to analyze depression of family caregivers of Alzheimer’s disease patients. First, we developed depression ontology called OntoDepression considering the l...
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Article
Open AccessGraphene/PbS quantum dot hybrid structure for application in near-infrared photodetectors
A graphene-PbS quantum dot (QD) composite for application in high-performance near-infrared (NIR) photodetectors (PDs) is proposed in this study. A single-layer graphene flake and oleic acid-capped PbS QD comp...
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Article
Open AccessDiffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals
Highly monodisperse colloidal InAs quantum dots (QDs) with superior optoelectronic properties are promising candidates for various applications, including infrared photodetectors and photovoltaics. Recently, a...
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Article
Purification of Colloidal Nanocrystals Along the Road to Highly Efficient Photovoltaic Devices
Colloidal semiconducting nanocrystals, also called colloidal quantum dots (QDs) afford efficient photoconversion from visible to infrared wavelength owing to their size-dependent optoelectronic properties. To ...
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Article
Open AccessTailored growth of single-crystalline InP tetrapods
Despite the technological importance of colloidal covalent III-V nanocrystals with unique optoelectronic properties, their synthetic process still has challenges originating from the complex energy landscape o...
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Article
Prognostic value of diffusion-weighted imaging in patients with newly diagnosed sporadic Creutzfeldt-Jakob disease
To evaluate clinico-radiologic markers that predict poor overall survival (OS) in sporadic Creutzfeldt-Jakob disease (sCJD) and to develop a prognostic model.
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Article
Zoledronic acid-loaded cationic methylcellulose polyplex nanoparticles for enhanced gene delivery efficiency and breast cancer cell killing effect
In this work, zoledronic acid-loaded cationic methylcellulose polyplex nanoparticles were developed for enhanced gene delivery efficiency and breast cancer cell killing effect. Zoledronic acid (Zol) is one of ...
