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E-Type Delayed Fluorescence of a Phosphine-Supported Cu_2(μ-NAr_2)_2 Diamond Core: Harvesting Singlet and Triplet Excitons in OLEDs

Deaton, Joseph C. and Switalski, Steven C. and Kondakov, Denis Y. and Young, Ralph H. and Pawlik, Thomas D. and Giesen, David J. and Harkins, Seth B. and Miller, Alex J. M. and Mickenberg, Seth F. and Peters, Jonas C. (2010) E-Type Delayed Fluorescence of a Phosphine-Supported Cu_2(μ-NAr_2)_2 Diamond Core: Harvesting Singlet and Triplet Excitons in OLEDs. Journal of the American Chemical Society, 132 (27). pp. 9499-9508. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20100805-140123621

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Abstract

A highly emissive bis(phosphine)diarylamido dinuclear copper(I) complex (quantum yield = 57%) was shown to exhibit E-type delayed fluorescence by variable temperature emission spectroscopy and photoluminescence decay measurement of doped vapor-deposited films. The lowest energy singlet and triplet excited states were assigned as charge transfer states on the basis of theoretical calculations and the small observed S_1−T_1 energy gap. Vapor-deposited OLEDs doped with the complex in the emissive layer gave a maximum external quantum efficiency of 16.1%, demonstrating that triplet excitons can be harvested very efficiently through the delayed fluorescence channel. The function of the emissive dopant in OLEDs was further probed by several physical methods, including electrically detected EPR, cyclic voltammetry, and photoluminescence in the presence of applied current.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja1004575 DOIUNSPECIFIED
http://pubs.acs.org/doi/full/10.1021/ja1004575PublisherUNSPECIFIED
ORCID:
AuthorORCID
Peters, Jonas C.0000-0002-6610-4414
Additional Information:© 2010 American Chemical Society. Received January 18, 2010. Publication Date (Web): June 17, 2010. The authors thank the National Science Foundation for support through Grant CHE 0616782 under the GOALI Program (Grant Opportunity for Academic Liaison with Industry). We thank the following people for technical assistance and insightful discussions: Ching W. Tang, Kevin Klubek, Shouquan Huo, Viktor Jarikov, Christopher Brown, Michael Landry, Debra Blondell, Shawn Reuter, and Dustin Comfort. We are grateful to Prof. Richard Eisenberg, University of Rochester, who was instrumental in bringing about our collaboration.
Funders:
Funding AgencyGrant Number
NSFCHE 0616782
Issue or Number:27
Record Number:CaltechAUTHORS:20100805-140123621
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20100805-140123621
Official Citation:E-Type Delayed Fluorescence of a Phosphine-Supported Cu2(μ-NAr2)2 Diamond Core: Harvesting Singlet and Triplet Excitons in OLEDs∥ Joseph C. Deaton, Steven C. Switalski, Denis Y. Kondakov, Ralph H. Young, Thomas D. Pawlik, David J. Giesen, Seth B. Harkins, Alex J. M. Miller, Seth F. Mickenberg, Jonas C. Peters Journal of the American Chemical Society 2010 132 (27), 9499-9508
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19301
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:05 Aug 2010 21:17
Last Modified:26 Nov 2019 11:15

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