Controlling the dopant profile for SRH suppression at low current densities in λ ≈ 1330 nm GaInAsP light-emitting diodes

AlN Õ AlGaInN superlattice light - emitting diodes at 280 nm

Ultraviolet light-emitting diodes operating at 280 nm, grown by gas source molecular-beam epitaxy with ammonia, are described. The device is composed of nand p-type superlattices of AlN~1.2 nm thick!/AlGaInN~0.5 nm thick! doped with Si and Mg, respectively. With these superlattices, and despite the high average Al content, we obtain hole concentrations of (0.7– 1.1)310 cm, with the mobility of ...

Nanostructure engineering of staggered InGaN quantum wells light emitting diodes emitting at 420-510 nm

Logarithmic current electrometer using light emitting diodes

The limit of low current measurement using logarithmic current to voltage converter is improved by 6–7 orders of magnitude with the use of diodes of large band gap as compared with silicon diodes. Low cost commercially available light emitting diodes (LEDs) have been used for this purpose. A theoretical study and experimental measurement of device constant and reverse saturation currents of the...

Internal Efficiency Analysis of 280 nm Light Emitting Diodes

Compact ultraviolet light sources are currently of high interest for a range of applications, including solid-state lighting, short-range communication, and bio-chemical detection. We report on the design and analysis of AlGaN-based lightemitting diodes with an emission wavelength near 280 nm. Internal device physics is investigated by threedimensional numerical simulation. The simulation incor...

Low frequency noise of light emitting diodes

Light emitting diodes (LEDs) are excellent candidates for the applications requiring low noise light sources with wavelengths ranging from 200 nm to 900 nm. These applications include the detection of fluorescence from protein molecules excited with the ultraviolet (UV) light (200-300nm) for identifying miniscule amounts of hazardous biological pathogens. The detection system including the ligh...