Open Access Nano Express

Stable White Light Electroluminescence from Highly Flexible Polymer/ZnO Nanorods Hybrid Heterojunction Grown at 50°C

A Zainelabdin*, S Zaman*, G Amin, O Nur and M Willander

Author Affiliations

Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden

For all author emails, please log on.

Nanoscale Research Letters 2010, 5:1442-1448  doi:10.1007/s11671-010-9659-1

Published: 4 June 2010

Abstract

Stable intrinsic white light–emitting diodes were fabricated from c-axially oriented ZnO nanorods (NRs) grown at 50°C via the chemical bath deposition on top of a multi-layered poly(9,9-dioctylfluorene-co–N-(4-butylpheneylamine)diphenylamine)/poly(9,9dioctyl-fluorene) deposited on PEDOT:PSS on highly flexible plastic substrate. The low growth temperature enables the use of a variety of flexible plastic substrates. The fabricated flexible white light–emitting diode (FWLED) demonstrated good electrical properties and a single broad white emission peak extending from 420 nm and up to 800 nm combining the blue light emission of the polyflourene (PFO) polymer layer with the deep level emission (DLEs) of ZnO NRs. The influence of the temperature variations on the FWLED white emissions characteristics was studied and the devices exhibited high operation stability. Our results are promising for the development of white lighting sources using existing lighting glass bulbs, tubes, and armature technologies.

Keywords:
Hybrid technology; ZnO nanorods; Polymers; Large area lighting; Flexible low temperature LEDs