Jump to main content
Jump to site search

Issue 8, 2018
Previous Article Next Article

Tunable quantum dot arrays as efficient sensitizers for enhanced near-infrared electroluminescence of erbium ions

Author affiliations

Abstract

Under electrical pumping conditions, high-efficiency Si-based near-infrared light generation and amplification on a chip have long been pursued for future optical interconnection technology. However, the overall performance of Si-based near-infrared electroluminescence (EL) devices, including the overall efficiency, turn-on voltage and stability under operational conditions, can rarely meet the requirements of monolithic optoelectronic integration. In this work, we designed a confined crystallization growth strategy for fabricating metal oxide quantum dot (QD) arrays embedded in Si-based films as sensitizers of Er3+ ions. Through the precise control of particle size and number density of QD sensitizers, the near-infrared photoluminescence (PL) emission of Er3+ ions can be enhanced by more than three orders of magnitude. More significantly, such hierarchical control over the regular arrangement of QD arrays not only considerably enhances the resonance energy transfer efficiency, but also offers an effective conduction path for carrier transport. Therefore, the corresponding near-infrared EL device exhibits a decreased turn-on voltage of 4.5 V, a high external quantum efficiency of 0.7%, and a long operational lifetime of more than 1000 hours, making this device superior to most Si-based on-chip near-infrared EL devices. This well-controlled metal oxide QD array represents an ideal sensitizer to effectively promote the EL emission of rare earth ions and reduce the turn-on voltage. Meanwhile, the analysis of the carrier transport mechanism paves the way for future research into resonance energy transfer under electrical pumping conditions.

Graphical abstract: Tunable quantum dot arrays as efficient sensitizers for enhanced near-infrared electroluminescence of erbium ions

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Nov 2017, accepted on 31 Jan 2018 and first published on 31 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR08820E
Citation: Nanoscale, 2018,10, 4138-4146
  •   Request permissions

    Tunable quantum dot arrays as efficient sensitizers for enhanced near-infrared electroluminescence of erbium ions

    X. W. Zhang, T. Lin, P. Zhang, H. C. Song, H. Jin, J. Xu, J. Xu, P. J. Wang, K. Y. Niu and K. J. Chen, Nanoscale, 2018, 10, 4138
    DOI: 10.1039/C7NR08820E

Search articles by author

Spotlight

Advertisements