Charge trap assisted high efficiency in new polymer-blend based light emitting diodes

M. U. Hassan; Yee Chen Liu; Kamran Ul Hasan; H. Butt; Jui Fen Chang; R. H. Friend

doi:10.1016/j.nanoen.2015.12.023

Charge trap assisted high efficiency in new polymer-blend based light emitting diodes

M. U. Hassan^*
, Yee Chen Liu
, Kamran Ul Hasan
, H. Butt
, Jui Fen Chang
, R. H. Friend

^*Corresponding author for this work

The University of Birmingham

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

314 Downloads (Pure)

Abstract

Polymer blend system, F8_1-xSY_x, based on mixture of poly (9,9-dioctylfluorene) (F8) and a poly (para-phenylenevinylene) (PPV) copolymer, superyellow (SY), has been proven to be a high performance blend material in polymer light emitting diode (PLED). This blend system exhibits luminance (L) >10⁴cdm^-2, luminous efficiency (η) >21cdA^-1 and low operating voltage (V) ~3-10V. The performance can be credited to the large difference (~0.6eV) between the highest occupied molecular orbital (HOMO) levels of F8 (~5.8eV) and SY (~5.2eV), where, SY molecules serve as hole-traps in the F8 host polymer and reduce their mobility. This dictates a balanced charge injection into the emissive layer and results in overall increase in the device performance.

Original language	English
Pages (from-to)	62-70
Number of pages	9
Journal	Nano Energy
Volume	21
Early online date	13 Jan 2016
DOIs	https://doi.org/10.1016/j.nanoen.2015.12.023
Publication status	Published - Mar 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Light emitting diodes
Poly(para-phenylenevinylenes)
Polyfluorenes
Polymer-blend diodes

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

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10.1016/j.nanoen.2015.12.023Licence: None: All rights reserved

151221-Traps-Assisted-High-Effciency-Diodes-revisedAccepted author manuscript, 1.22 MBLicence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

Cite this

@article{88574b6f62a544639b7e3776257d7221,

title = "Charge trap assisted high efficiency in new polymer-blend based light emitting diodes",

abstract = "Polymer blend system, F81-xSYx, based on mixture of poly (9,9-dioctylfluorene) (F8) and a poly (para-phenylenevinylene) (PPV) copolymer, superyellow (SY), has been proven to be a high performance blend material in polymer light emitting diode (PLED). This blend system exhibits luminance (L) >104cdm-2, luminous efficiency (η) >21cdA-1 and low operating voltage (V) \textasciitilde{}3-10V. The performance can be credited to the large difference (\textasciitilde{}0.6eV) between the highest occupied molecular orbital (HOMO) levels of F8 (\textasciitilde{}5.8eV) and SY (\textasciitilde{}5.2eV), where, SY molecules serve as hole-traps in the F8 host polymer and reduce their mobility. This dictates a balanced charge injection into the emissive layer and results in overall increase in the device performance.",

keywords = "Light emitting diodes, Poly(para-phenylenevinylenes), Polyfluorenes, Polymer-blend diodes",

author = "Hassan, \{M. U.\} and Liu, \{Yee Chen\} and Hasan, \{Kamran Ul\} and H. Butt and Chang, \{Jui Fen\} and Friend, \{R. H.\}",

year = "2016",

month = mar,

doi = "10.1016/j.nanoen.2015.12.023",

language = "English",

volume = "21",

pages = "62--70",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier",

}

TY - JOUR

T1 - Charge trap assisted high efficiency in new polymer-blend based light emitting diodes

AU - Hassan, M. U.

AU - Liu, Yee Chen

AU - Hasan, Kamran Ul

AU - Butt, H.

AU - Chang, Jui Fen

AU - Friend, R. H.

PY - 2016/3

Y1 - 2016/3

N2 - Polymer blend system, F81-xSYx, based on mixture of poly (9,9-dioctylfluorene) (F8) and a poly (para-phenylenevinylene) (PPV) copolymer, superyellow (SY), has been proven to be a high performance blend material in polymer light emitting diode (PLED). This blend system exhibits luminance (L) >104cdm-2, luminous efficiency (η) >21cdA-1 and low operating voltage (V) ~3-10V. The performance can be credited to the large difference (~0.6eV) between the highest occupied molecular orbital (HOMO) levels of F8 (~5.8eV) and SY (~5.2eV), where, SY molecules serve as hole-traps in the F8 host polymer and reduce their mobility. This dictates a balanced charge injection into the emissive layer and results in overall increase in the device performance.

AB - Polymer blend system, F81-xSYx, based on mixture of poly (9,9-dioctylfluorene) (F8) and a poly (para-phenylenevinylene) (PPV) copolymer, superyellow (SY), has been proven to be a high performance blend material in polymer light emitting diode (PLED). This blend system exhibits luminance (L) >104cdm-2, luminous efficiency (η) >21cdA-1 and low operating voltage (V) ~3-10V. The performance can be credited to the large difference (~0.6eV) between the highest occupied molecular orbital (HOMO) levels of F8 (~5.8eV) and SY (~5.2eV), where, SY molecules serve as hole-traps in the F8 host polymer and reduce their mobility. This dictates a balanced charge injection into the emissive layer and results in overall increase in the device performance.

KW - Light emitting diodes

KW - Poly(para-phenylenevinylenes)

KW - Polyfluorenes

KW - Polymer-blend diodes

UR - https://www.scopus.com/pages/publications/84955260831

U2 - 10.1016/j.nanoen.2015.12.023

DO - 10.1016/j.nanoen.2015.12.023

M3 - Article

AN - SCOPUS:84955260831

SN - 2211-2855

VL - 21

SP - 62

EP - 70

JO - Nano Energy

JF - Nano Energy

ER -

Charge trap assisted high efficiency in new polymer-blend based light emitting diodes

Abstract

UN SDGs

Keywords

ASJC Scopus subject areas

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