Stable and efficient electroluminescence from a porous silicon-based bipolar device

L. Tsybeskov, S. P. Duttagupta, K. D. Hirschman, P. M. Fauchet

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Abstract

A complete process compatible with conventional Si technology has been developed in order to produce a bipolar light-emitting device. This device consists of a layer of light-emitting porous silicon annealed at high temperature (800-900°C) sandwiched between a p-type Si wafer and a highly doped (n+) polycrystalline Si film. The properties of the electroluminescence (EL) strongly depend on the annealing conditions. Under direct bias, EL is detected at voltages of ∼2 V and current densities J∼1 mA/cm 2. The maximum EL intensity is 1 mW/cm2 and the EL can be modulated by a square wave current pulse with frequencies ν≥1 MHz. No degradation has been observed during 1 month of pulsed operation.

Original languageEnglish (US)
Number of pages1
JournalApplied Physics Letters
StatePublished - Dec 1 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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