Dependence of the emission from tris(8-hydroxyquinoline) aluminum based microcavity on device thickness and the emission layer position

In this work, we present a systematic study of the emission from bilayer organic microcavity light emitting diodes with two metal mirrors. The devices consisting of two organic layers, N,NV-di(naphthalene-1-yl)-N,NV-diphenylbenzidine as the hole transport layer and tris (8-hydroxyquinoline) aluminum as the emitting layer, and two metal mirrors were fabricated and characterized by transmittance, reflectance, photoluminescence, and electroluminescence measurements. The effects of layer thickness, interface position, and the choice of anode(bottom mirror) were investigated. The transmittance and reflectance spectra were modeled using a transfer matrix model, and the optical functions for all the materials used were determined by spectroscopic ellipsometry. The dependence of the photoluminescence and electroluminescence spectra on the device thickness and interface position is discussed

Epidemiology of diabetes mellitus in the Asia-Pacific region.

Annals of the Academy of Medicine Singapore194501-50

Numerical flow simulation in a centrifugal pump at design and off-design conditions

10.1155/2007/83641International Journal of Rotating Machinery2007

Magnetic field effect on photocurrent in N,N'-di(naphthalene-l-yl)-N,N'- diphenyl-benzidine (NPB)

We studied organic magnetoresistance (OMAR) and magneto-photocurrent (MPC) in ITO/N,N'-di(naphthalene-l-yl)-N,N'-diplienyl-benzidine (NPB)/A1 sandwich devices with NPB thicknesses of 50 nm. Without illumination, no OMAR is observable. While the MPC curves are found to have different line shapes containing a low field and a high field component, depending on excitation photon energy and applied bias. The analysis of experimental results indicate that: (i) the magnetic field effects in NPB is associated with excitonic states, and (ii) the dissociation of singlet excitons is associated to the high field component and triplet-exciton-charge interaction is to the low field component in MPC curves. © 2009 IOP Publishing Ltd

Near field imaging from multilayer lens

Multilayer superlens has been reported that it had advantages over the single metal layer superlens. In this work, single silver layer and Ag-SiO 2 multilayer superlens devices working at wavelength of 365 nm were fabricated using standard photolithography method. Grating objects with line/space (190 nm/190 nm) resolution could be resolved through both kinds of lens structures with working distance up to 128 nm. However, Ag-SiO 2 multilayer lens shows higher transmittance and image contrast than the single silver layer device, the experimental result proves the theoretical calculation. Copyright © 2011 American Scientific Publishers All rights reserved

Alcohol consumption in Chinese, Malays and Indians in Singapore.

Annals of the Academy of Medicine Singapore193330-33

Infections in diabetes with special reference to diabetics in Singapore

Annals of the Academy of Medicine Singapore142240-246AAMS

Obesity and body mass indices in Chinese, Malays and Indians in Singapore.

Annals of the Academy of Medicine Singapore193333-33

Physical activity in Chinese, Malays and Indians in Singapore.

Annals of the Academy of Medicine Singapore193326-32