Tyagi, Priyanka and Kumar, Arunandan and Giri, Lalat Indu and Dalai, Manas Kumar and Tuli, Suneet and Kamalasanan, M. N and Srivastava, Ritu (2013) Exciton quenching by diffusion of 2,3,5,6-tetrafluoro7,7 ',8,8 '-tetra cyano quino dimethane and its consequences on joule heating and lifetime of organic light-emitting diodes. Optics Letters, 38 (19). pp. 3854-3857. ISSN 0146-9592

PDF - Published Version Restricted to Registered users only Download (480Kb) | Request a copy

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 40 mA/cm(2)) 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.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Optical Society of America
Subjects:	Optics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:07
Last Modified:	19 Aug 2026 10:07
URI:	https://npl.csircentral.net/id/eprint/3232

Actions (login required)

View Item