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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 19 — Oct. 1, 2013
  • pp: 3854–3857

Exciton quenching by diffusion of 2,3,5,6-tetrafluoro-7,7’,8,8’-tetra cyano quino dimethane and its consequences on joule heating and lifetime of organic light-emitting diodes

Priyanka Tyagi, Arunandan Kumar, Lalat Indu Giri, Manas Kumar Dalai, Suneet Tuli, M. N. Kamalasanan, and Ritu Srivastava  »View Author Affiliations


Optics Letters, Vol. 38, Issue 19, pp. 3854-3857 (2013)
http://dx.doi.org/10.1364/OL.38.003854


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Abstract

In this Letter, the effect of F4-TCNQ insertion at the anode/hole transport layer (HTL) interface was studied on joule heating and the lifetime of organic light-emitting diodes (OLEDs). Joule heating was found to reduce significantly (pixel temperature decrease by about 10 K at a current density of 40mA/cm2) by this insertion. However, the lifetime was found to reduce significantly with a 1 nm thick F4-TCNQ layer, and it improved by increasing the thickness of this layer. Thermal diffusion of F4-TCNQ into HTL leads to F4-TCNQ ionization by charge transfer, and drift of these molecules into the emissive layer caused faster degradation of the OLEDs. This drift was found to reduce with an increase in the thickness of F4-TCNQ.

© 2013 Optical Society of America

OCIS Codes
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(160.4890) Materials : Organic materials
(230.3670) Optical devices : Light-emitting diodes
(250.0250) Optoelectronics : Optoelectronics
(250.3680) Optoelectronics : Light-emitting polymers

ToC Category:
Optoelectronics

History
Original Manuscript: June 27, 2013
Revised Manuscript: August 13, 2013
Manuscript Accepted: August 20, 2013
Published: September 24, 2013

Citation
Priyanka Tyagi, Arunandan Kumar, Lalat Indu Giri, Manas Kumar Dalai, Suneet Tuli, M. N. Kamalasanan, and Ritu Srivastava, "Exciton quenching by diffusion of 2,3,5,6-tetrafluoro-7,7’,8,8’-tetra cyano quino dimethane and its consequences on joule heating and lifetime of organic light-emitting diodes," Opt. Lett. 38, 3854-3857 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-19-3854

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