Size-tunable infrared (1000-1600 nm) electroluminescence from solution-processible PbS quantum dot nanocrystals: Towards monolithic optoelectronic integration on silicon

Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

This article reviews devices fabricated using room-temperature solution-casting compatible with silicon post-processing, which produce communications-wavelength electroluminescence. Integrable optoelectronics may be facilitated in this processible material system - one which may conveniently be combined with silicon electronics, passive optics, and RF platforms. Synthetic conditions determine nanocrystal diameter and thereby tune, through the quantum size effect, the spectrum of optical emissions from the quantum dots. It is shown that it is possible to span across and beyond the 1.3-1.6 μm spectrum of optical communications. Nonradiative recombination from the nanocrystals' surface is addressed by choosing stabilizing, passivating organic ligands which nevertheless permit energy transfer from polymer to nanocrystals. Experimental determination of the efficiency of excitation transfer from the polymer matrix to dots, a key factor in increasing device electroluminescence efficiency, is described.

Original languageEnglish (US)
Pages (from-to)2797-2803
Number of pages7
JournalJournal of Modern Optics
Volume51
Issue number16-18
DOIs
StatePublished - Nov 10 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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