Issue 11, 2016
From the journal:

Nanoscale

Exciton energy recycling from ZnO defect levels: towards electrically driven hybrid quantum-dot white light-emitting-diodes†

Xin Zhao,‡a   Weizhen Liu,‡ab   Rui Chen,a   Yuan Gao,a   Binbin Zhu,a   Hilmi Volkan Demir,acd   Shijie Wange  and  Handong Sun*af  

* Corresponding authors

a Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore
E-mail: hdsun@ntu.edu.sg

b Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun 130024, China

c School of Electrical and Electronic Engineering, Block S2.1, 50 Nanyang Avenue, Nanyang Technological University, Singapore

d Department of Electrical and Electronic Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, Ankara, Turkey

e Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore

f Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, SPMS-PAP-01-28, 21 Nanyang Link, Singapore

Abstract

An electrically driven quantum-dot hybrid white light-emitting diode is fabricated via spin coating CdSe quantum dots onto a GaN/ZnO nanorod matrix. For the first time, quantum dots are excited by fluorescence resonance energy transfer from the carriers trapped at surface defect levels. The prototype device exhibits achromatic emission, with a chromaticity coordinate of (0.327, 0.330), and correlated color temperature similar to sunlight.

Graphical abstract: Exciton energy recycling from ZnO defect levels: towards electrically driven hybrid quantum-dot white light-emitting-diodes

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Article information

DOI
https://doi.org/10.1039/C5NR09261B
Article type
Communication
Submitted
29 Dec 2015
Accepted
09 Feb 2016
First published
10 Feb 2016

Nanoscale, 2016,8, 5835-5841

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Exciton energy recycling from ZnO defect levels: towards electrically driven hybrid quantum-dot white light-emitting-diodes

X. Zhao, W. Liu, R. Chen, Y. Gao, B. Zhu, H. V. Demir, S. Wang and H. Sun, Nanoscale, 2016, 8, 5835 DOI: 10.1039/C5NR09261B

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