Modulating the line shape of magnetoconductance by varying the charge injection in polymer light-emitting diodes

Nidya Chitraningrum, Ting Yi Chu, Ping Tsung Huang, Ten-Chin Wen, Tzung-Fang Guo

Research output: Contribution to journalArticle

Abstract

We fabricate the phenyl-substituted poly(p-phenylene vinylene) copolymer (super yellow, SY-PPV)-based polymer light-emitting diodes (PLEDs) with different device architectures to modulate the injection of opposite charge carriers and investigate the corresponding magnetoconductance (MC) responses. At the first glance, we find that all PLEDs exhibit the positive MC responses. By applying the mathematical analysis to fit the curves with two empirical equations of a non-Lorentzian and a Lorentzian function, we are able to extract the hidden negative MC component from the positive MC curve. We attribute the growth of the negative MC component to the reduced interaction of the triplet excitons with charges to generate the free charge carriers as modulated by the applied magnetic field, known as the triplet exciton-charge reaction, by analyzing MC responses for PLEDs of the charge-unbalanced and hole-blocking device configurations. The negative MC component causes the broadening of the line shape in MC curves.

Original languageEnglish
Article number025209
JournalAIP Advances
Volume8
Issue number2
DOIs
Publication statusPublished - 2018 Feb 1

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line shape
light emitting diodes
injection
charge carriers
polymers
curves
excitons
applications of mathematics
copolymers
causes
configurations
magnetic fields
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Modulating the line shape of magnetoconductance by varying the charge injection in polymer light-emitting diodes",
abstract = "We fabricate the phenyl-substituted poly(p-phenylene vinylene) copolymer (super yellow, SY-PPV)-based polymer light-emitting diodes (PLEDs) with different device architectures to modulate the injection of opposite charge carriers and investigate the corresponding magnetoconductance (MC) responses. At the first glance, we find that all PLEDs exhibit the positive MC responses. By applying the mathematical analysis to fit the curves with two empirical equations of a non-Lorentzian and a Lorentzian function, we are able to extract the hidden negative MC component from the positive MC curve. We attribute the growth of the negative MC component to the reduced interaction of the triplet excitons with charges to generate the free charge carriers as modulated by the applied magnetic field, known as the triplet exciton-charge reaction, by analyzing MC responses for PLEDs of the charge-unbalanced and hole-blocking device configurations. The negative MC component causes the broadening of the line shape in MC curves.",
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Modulating the line shape of magnetoconductance by varying the charge injection in polymer light-emitting diodes. / Chitraningrum, Nidya; Chu, Ting Yi; Huang, Ping Tsung; Wen, Ten-Chin; Guo, Tzung-Fang.

In: AIP Advances, Vol. 8, No. 2, 025209, 01.02.2018.

Research output: Contribution to journalArticle

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AU - Chitraningrum, Nidya

AU - Chu, Ting Yi

AU - Huang, Ping Tsung

AU - Wen, Ten-Chin

AU - Guo, Tzung-Fang

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