Highly efficient PLEDs based on poly(9,9-dioctylfluorene) and Super Yellow blend with Cs2CO3 modified cathode

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

doi:10.1016/j.apmt.2015.08.005

Highly efficient PLEDs based on poly(9,9-dioctylfluorene) and Super Yellow blend with Cs₂CO₃ modified cathode

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

^*Corresponding author for this work

Mechanical Engineering

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

14 Citations (Scopus)

Abstract

Polymer light emitting diodes (PLEDs) based on the blend of 90% poly(9,9-dioctylfluorene) (F8) and 10% Super Yellow (SY) were used as the emissive layer and it exhibited high luminous efficiency up to ∼27 cd A^-1. Hole-trapping nature native to the proposed blend system and efficient electron injection via Al/Ca/Cs₂CO₃ cathode was used against the conventional ITO/PEDOT:PSS anode which provided a well-balanced charge transport across the emissive layer. Thereby, the scheme maximizes the radiative recombination of these excitons within the bulk and away from the cathode. Consequently, non-radiative quenching effects at the cathode surface were avoided which resulted in ultrahigh efficiency of such devices.

Original language	English
Pages (from-to)	45-51
Number of pages	7
Journal	Applied Materials Today
Volume	1
Issue number	1
Early online date	8 Sept 2015
DOIs	https://doi.org/10.1016/j.apmt.2015.08.005
Publication status	Published - Nov 2015

Keywords

Cathode modification
Interfacial engineering
Light emitting diodes
Poly(para-phenylenevinylenes)
Polyfluorenes

ASJC Scopus subject areas

Materials Science(all)

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Cite this

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title = "Highly efficient PLEDs based on poly(9,9-dioctylfluorene) and Super Yellow blend with Cs2CO3 modified cathode",

abstract = "Polymer light emitting diodes (PLEDs) based on the blend of 90% poly(9,9-dioctylfluorene) (F8) and 10% Super Yellow (SY) were used as the emissive layer and it exhibited high luminous efficiency up to ∼27 cd A-1. Hole-trapping nature native to the proposed blend system and efficient electron injection via Al/Ca/Cs2CO3 cathode was used against the conventional ITO/PEDOT:PSS anode which provided a well-balanced charge transport across the emissive layer. Thereby, the scheme maximizes the radiative recombination of these excitons within the bulk and away from the cathode. Consequently, non-radiative quenching effects at the cathode surface were avoided which resulted in ultrahigh efficiency of such devices.",

keywords = "Cathode modification, Interfacial engineering, Light emitting diodes, Poly(para-phenylenevinylenes), Polyfluorenes",

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

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AU - Hassan, M. U.

AU - Liu, Yee Chen

AU - Hasan, Kamran Ul

AU - Butt, H.

AU - Chang, Jui Fen

AU - Friend, R. H.

PY - 2015/11

Y1 - 2015/11

N2 - Polymer light emitting diodes (PLEDs) based on the blend of 90% poly(9,9-dioctylfluorene) (F8) and 10% Super Yellow (SY) were used as the emissive layer and it exhibited high luminous efficiency up to ∼27 cd A-1. Hole-trapping nature native to the proposed blend system and efficient electron injection via Al/Ca/Cs2CO3 cathode was used against the conventional ITO/PEDOT:PSS anode which provided a well-balanced charge transport across the emissive layer. Thereby, the scheme maximizes the radiative recombination of these excitons within the bulk and away from the cathode. Consequently, non-radiative quenching effects at the cathode surface were avoided which resulted in ultrahigh efficiency of such devices.

AB - Polymer light emitting diodes (PLEDs) based on the blend of 90% poly(9,9-dioctylfluorene) (F8) and 10% Super Yellow (SY) were used as the emissive layer and it exhibited high luminous efficiency up to ∼27 cd A-1. Hole-trapping nature native to the proposed blend system and efficient electron injection via Al/Ca/Cs2CO3 cathode was used against the conventional ITO/PEDOT:PSS anode which provided a well-balanced charge transport across the emissive layer. Thereby, the scheme maximizes the radiative recombination of these excitons within the bulk and away from the cathode. Consequently, non-radiative quenching effects at the cathode surface were avoided which resulted in ultrahigh efficiency of such devices.

KW - Cathode modification

KW - Interfacial engineering

KW - Light emitting diodes

KW - Poly(para-phenylenevinylenes)

KW - Polyfluorenes

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