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Article
Open AccessCrystal Facet Engineering of TiO2 Nanostructures for Enhancing Photoelectrochemical Water Splitting with BiVO4 Nanodots
Two types of BiVO4/TiO2 heterostructure photoanodes comprising TiO2 nanorods (NRs) and TiO2 nanoflowers (NFs) with different (001) and (110) crystal facets...
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Article
Random Nanowire Arrays Spontaneously Formed via Vacuum Deposition for Enhancing Light Extraction from Inverted Top-Emitting Organic Light-Emitting Diodes
Top-emittng organic light-emitting diodes (TEOLEDs) are used in small displays, due to the high aperture ratios, unblurred imaging, and high color purity. However, the strong cavity structures responsible for ...
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Article
Open AccessLensfree OLEDs with over 50% external quantum efficiency via external scattering and horizontally oriented emitters
High efficiency is important for successful deployment of any light sources. Continued efforts have recently made it possible to demonstrate organic light-emitting diodes with efficiency comparable to that of ...
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Article
Open AccessUnraveling the orientation of phosphors doped in organic semiconducting layers
Emitting dipole orientation is an important issue of emitting materials in organic light-emitting diodes for an increase of outcoupling efficiency of light. The origin of preferred orientation of emitting dipo...
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Article
Open AccessVacuum Nanohole Array Embedded Phosphorescent Organic Light Emitting Diodes
Light extraction from organic light-emitting diodes that utilize phosphorescent materials has an internal efficiency of 100% but is limited by an external quantum efficiency (EQE) of 30%. In this study, extrem...
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Article
Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes
Organic light-emitting diodes (OLEDs) are among the most promising organic semiconductor devices. The recently reported external quantum efficiencies (EQEs) of 29–30% for green and blue phosphorescent OLEDs ar...
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Article
Open AccessFormation of perfect ohmic contact at indium tin oxide/N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine interface using ReO3
A perfect ohmic contact is formed at the interface of indium tin oxide (ITO) and N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) using ReO3 as the interfacial layer. The hole injection efficiency is close...
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Article
Synthesis and device performance of new efficient blue copolymers containing biphenylenevinylene and triphenyldiamine
A series of light-emitting copolymers, poly(N 4,N 4-bis-(4-phenyl)-N 4,N 4′-bis-[4-(2-ethylhexyloxy)phenyl]-biphenyl...
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Article
Invited paper: Nanostructures of a mixed donor and acceptor layer in organic photovoltaics
In organic photovoltaics with a mixed donor and acceptor structure, the junction property is directly related to the morphology because charge transportation is determined by the formation of inter penetrating...
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Article
Low-loss Polymer Optical Waveguides with High Thermal Stability
We synthesized novel cross-linkable fluorinated copoly(arylene ether sulfide)s for optical waveguide applications, which have high thermal stability, high optical transparency in the infrared communication reg...
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Article
Singlet and Triplet Energy Transfer in Phosphorescent Dye Doped Polymer Light Emitting Devices
Effect of host polymers on energy transfer in phosphorescent dye doped polymer light emitting devices has been investigated. Poly (N-vinylcarbazol) [PVK] and poly (9, 9’-di-n-hexyl-2, 7-fluorene-alt-1, 4(2, 5d...
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Article
Electrophosphorescent Light Emitting Devices Using Mixed Ligand Ir(III) Complexes
We have fabricated phosphorescent light emitting devices using mixed ligand bisorthometalated Ir(III) complexes, chlorobis-(2-phenylpyridinato-N, C electronics2′)pyridineiridium(III) [Ir(Cl)(ppy)2(py)] and chloro...
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Article
Direct pattering of polymer optical waveguide using liquid state UV-curable polymer
We demonstrated the fabrication of single-mode optical waveguides using the direct patterning of aliquid-state UV-and thermally curable polymer. The propagation loss of channel waveguide was 0.85 and 1.83 dB/cm a...
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Article
Macroporous polystyrene-supported quaternary ammonium salt catalysts for the addition of carbon dioxide to glycidyl methacrylate
In the present study, the synthesis of (2-oxo-1,3-dioxolan-4-yl)methyl methacrylate (DOMA) from carbon dioxide and glycidyl methacrylate (GMA) was investigated in a semi-batch reactor using macroporous polysty...
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Article
Synthesis of phenoxymethyl ethylene carbonate using quaternary ammonium salt catalysts grafted onto styrene-vinylbenzylchloride-montmorillonite support
The synthesis of phenoxymethyl ethylene carbonate (PMEC) from carbon dioxide and phenyl glycidyl ether (PGE) was investigated using styrene-vinylbenzylchloride-montmorillonite supported quaternary ammonium sal...
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Article
Addition of Carbon Dioxide to Phenylglycidyl Ether Using Polymer-Supported Quaternary Ammonium Salt Catalysts
The synthesis of phenoxymethyl ethylene carbonate from carbon dioxide and phenyl glycidyl ether was investigated in a semi-batch reactor using crosslinked polystyrene beads containing pendant quaternary ammoni...
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Article
Synthesis and properties of poly(p-phenylenevinylene-co-sulfonylene) for a blue light-emitting diode
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Article
Photobleaching for the formation of nonlinear optical polymer waveguide devices
A simple but realistic kinetic model has been developed to delineate the refractive index profiles formed by photochemical reaction in nonlinear optical polymers. The effects of the absorption due to the uncon...
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Article
Electroluminescence Behavior in Polymer Blend of Two Luminescent Polymers
We report the electroluminescence behaviour of the devices made with the polymer blend of two emissible polymers, poly(2-methoxy,5-(2’-ethyl-hexoxy)-1,4-phenylene vinylene)(MEH-PPV) and poly[1,3-propanedioxy-1...
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Article
Linear and Non-Linear Optical Properties of (2-Cyano-5-Methoxy-1,4-Phenylenevinylene) and Paraphenylenevinylene Copolymers
Poly(CMPV-co-PV) have been synthesized via water soluble sulfonium salt precursor route and their linear and non-linear optical properties were characterized. The electro-optic response was stable up to 100°C ...
