Visible electroluminescence from hybrid colloidal silicon quantum dot-organic light-emitting diodes

Chang Ching Tu, Liang Tang, Jiangdong Huang, Apostolos Voutsas, Lih Y. Lin

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We demonstrate hybrid colloidal silicon quantum dot (SiQD)-organic light-emitting diodes with electroluminescence (EL) in the visible wavelengths. The device using blue photoluminescence (PL) SiQDs as emitters shows multiple EL peaks which are attributed to carrier recombination in the core quantum confinement states, the hole-transport-layer and the surface trap states, respectively. However, the red PL SiQD device shows a single EL peak consistent with the PL peak. These findings are in agreement with the previous report that large Stokes shift were observed for oxidized blue emission SiQDs due to oxide states while red emission SiQDs show negligible PL shift after oxidation.

Original languageEnglish
Article number213102
JournalApplied Physics Letters
Volume98
Issue number21
DOIs
StatePublished - 23 May 2011

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