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Title: Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters
Authors: Mutlugun, Evren
Guzelturk, Burak
Abiyasa, Agus Putu
Gao, Yuan
Sun, Xiao Wei
Demir, Hilmi Volkan
Keywords: Hybrid light-emitting diodes
Colloidal quantum dots
Phosphorescent molecules
Nonradiative energy transfer
Triplet state harvesting
Issue Date: 2014
Source: Mutlugun, E., Guzelturk, B., Abiyasa, A. P., Gao, Y., Sun, X. W., & Demir, H. V. (2014). Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton Harvesters. The Journal of Physical Chemistry Letters, 5(16), 2802-2807.
Series/Report no.: The Journal of Physical Chemistry Letters
Abstract: Nonradiative energy transfer (NRET) is an alternative excitation mechanism in colloidal quantum dot (QD) based electroluminescent devices (QLEDs). Here, we develop hybrid highly spectrally pure QLEDs that facilitate energy transfer pumping via NRET from a phosphorescent small organic molecule-codoped charge transport layer to the adjacent QDs. A partially codoped exciton funnelling electron transport layer is proposed and optimized for enhanced QLED performance while exhibiting very high color purity of 99%. These energy transfer pumped hybrid QLEDs demonstrate a 6-fold enhancement factor in the external quantum efficiency over the conventional QLED structure, in which energy transfer pumping is intrinsically weak.
ISSN: 1948-7185
DOI: 10.1021/jz5012669
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by The Journal of Physical Chemistry Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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