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Current spreading, heat transfer, and light extraction in multipixel LED array
M.V. Bogdanov, K.A. Bulashevich, I.Yu. Evstratov, S.Yu. Karpov
phys. stat. solidi (c) 5, No. 6, 2070–2072 (2008) (04)
Using simulation, we have investigated into the current spreading, heat transfer, and light emission in a high-power light-emitting diode (LED) with an interdigitated multipixel array (IMPA) chip design. The main advantages of such LEDs compared with conventional square-shaped ones, like a lower series resistance and a higher emission efficiency at high currents, are interpreted in terms of current spreading and local active region overheating originated from the current crowding typical for planar LED dice.
 
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