Injection-avalanche-based n+pn silicon complementary metal-oxide-semiconductor light-emitting device (450-750nm) with 2-order-of-magnitude increase in light emission intensity

Lukas W. Snyman, Monuko Du Plessis, Herzl Aharoni

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

In this paper, we report on an increase in emission intensity of up to 10 nW/μm2 that has been realized with a new novel two junction, diagonal avalanche control, and minority carrier injection silicon complementary metal-oxide-semiconductor (CMOS) light emitting device (LED). The device utilizes a four-terminal configuration with two embedded shallow n+p junctions in a p substrate. One junction is kept in deep-avalanche and light-emitting mode, while the other junction is forward biased and minority carrier electrons are injected into the avalanching junction. The device has been realized using standard 0.35 μm CMOS design rules and fabrication technology and operates at 9 V in the current range 0.1-3 mA. The optical output power is about one order of magnitude higher for previous single-junction n+p light-emitting devices while the emission intensity is about two orders of magnitude higher than for single-junction devices. The optical output is about three orders of magnitude higher than the low-frequency detectivity limit of silicon p-i-n detectors of comparable dimensions. The realized characteristics may enable diverse optoelectronic applications in standard-CMOS-silicon-technology-based integrated circuitry.

Original languageEnglish
Pages (from-to)2474-2480
Number of pages7
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number4 B
DOIs
StatePublished - 24 Apr 2007

Keywords

  • CMOS integrated circuitry
  • Light-emitting devices
  • Optoelectronics
  • Si LED
  • Silicon

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