Multichannel Online Lifetime Accelerating and Testing System for Power Light-Emitting Diodes

DC lifetime of encapsulated organic light emitting diodes

Organic light emitting diodes (OLEDs) are ideal sources for chemical and biological optical sensors [1], due to their simplicity, low cost (disposable applications) and possibility to be integrated on chip and fabricated in the form of large 2D arrays (microarray fluorescence [2]) even on flexible plastic substrates. OLEDs with lifetimes of a few hundreds of hours at initial luminance values in...

Performance characteristics of high-power light-emitting diodes

A laboratory experiment was conducted to investigate the performance characteristics of the currently available highpower LEDs under various drive conditions and ambient temperatures. Light output degradation and color shift properties as a function of time were measured for five types of commercial high-flux LEDs, namely, red, green, blue, and white from one manufacturer, and a different high-...

Light-emitting silicon pn diodes

We report on the electrical and optical characteristics of silicon light-emitting pn diodes. The diodes are prepared by ion implantation of boron at high doses and subsequent hightemperature annealing. Under forward bias, the diodes emit infrared electroluminescence closely below the band gap of bulk Si. We present a rate-equation model for bound excitons, free excitons and free carriers which ...

ZnO - Based Light - Emitting Diodes

GaN microdisk light emitting diodes

Articles you may be interested in Suppression of electron overflow and efficiency droop in N-polar GaN green light emitting diodes Appl. High-density plasma-induced etch damage of InGaN/GaN multiple quantum well light-emitting diodes