Study of field driven electroluminescence in colloidal quantum dot solids
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Author(s)
Bozyigit, Deniz
Wood, Vanessa
Shirasaki, Yasuhiro
Bulovic, Vladimir
Date Issued
June 2012
Journal
Journal of Applied Physics
Publisher
American Institute of Physics (AIP)
Citation
Bozyigit, Deniz, Vanessa Wood, Yasuhiro Shirasaki, and Vladimir Bulovic. “Study of Field Driven Electroluminescence in Colloidal Quantum Dot Solids.” Journal of Applied Physics 111, no. 11 (2012): 113701. © 2012 American Institute of Physics
Version
Final published version
Abstract
Semiconductor nanocrystals, or quantum dots(QDs), promise to drive advances in electronic light generation. It was recently shown that long range transport of charge, which is typically required for electric excitation and which is inherently limited in nanosized materials, can be avoided by developing devices that operate through local, field-assisted generation of charge. We investigate such devices that consist of a thin film of CdSe/ZnS core-shell QD placed between two dielectric layers and that exhibit electroluminescence under pulsed, high field excitation. Using electrical and spectroscopic measurements, we are able to elucidate the dynamics of charge within the QD layer and determine that charge trapping and field-induced luminescence quenching are the main limitations of device performance.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. School of Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4720377
