Energy transfer and compatibility analysis of PVK/MEH-PPV blends processed via electrospraying and electrospinning

Margarita Mondragón, J. Uriel Balderas, G. Lesly Jiménez, Ma Esther Sánchez-Espíndola, Ciro Falcony

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

© 2014 Elsevier B.V. All rights reserved. Solution polymer blends of a high molecular weight and a low molecular weight poly(9-vinyl carbazole) PVK with poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), at a fixed blend ratio of 95.5:0.5, were processed via electrospraying and electrospinning. SEM studies revealed that electrosprayed particles were produced when low molecular weight PVK was used, while electrospun fibers were successfully obtained from solutions containing high molecular weight PVK, over a concentration range of 4-10% (w/v). From the absorption spectra of the neat polymers it was determined that Urbach energy Euincrease and optical band gap Egdecreases due to the physical defects along the main chain introduced by these electrostatic processing methods. Photoluminescence spectroscopy revealed a particular applied voltage, which depends on concentration and molecular weight, where aggregation of PVK levels off. Luminescence quenching of MEH-PPV is also observed to increase with applied voltage consistent with possible energy transfer from shorter conjugation length segments to nearby longer conjugated segments. The ratio of the intensity of the excitation spectra of the PVK (donor, both PVKLor PVKH) and the MEH-PPV (acceptor), ID/IA, exhibited minima at this particular voltage and then levels off, indicating not only maximum interpenetration and thus compatibility of both polymers but also maximum energy transfer. Hence, we demonstrate that compatibility and energy transfer can be optimized varying concentration and applied voltage during both electrospraying and electrospinning processes.
Original languageAmerican English
Pages (from-to)2993-2999
Number of pages7
JournalOrganic Electronics: physics, materials, applications
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

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Electrospinning
Energy transfer
compatibility
Molecular weight
energy transfer
molecular weight
electric potential
low molecular weights
Electric potential
Polymers
carbazoles
polymer blends
polymers
conjugation
Photoluminescence spectroscopy
Optical band gaps
Polymer blends
quenching
luminescence
electrostatics

Cite this

@article{1282e7ee4886437bae2016ec5339fa4b,
title = "Energy transfer and compatibility analysis of PVK/MEH-PPV blends processed via electrospraying and electrospinning",
abstract = "{\circledC} 2014 Elsevier B.V. All rights reserved. Solution polymer blends of a high molecular weight and a low molecular weight poly(9-vinyl carbazole) PVK with poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), at a fixed blend ratio of 95.5:0.5, were processed via electrospraying and electrospinning. SEM studies revealed that electrosprayed particles were produced when low molecular weight PVK was used, while electrospun fibers were successfully obtained from solutions containing high molecular weight PVK, over a concentration range of 4-10{\%} (w/v). From the absorption spectra of the neat polymers it was determined that Urbach energy Euincrease and optical band gap Egdecreases due to the physical defects along the main chain introduced by these electrostatic processing methods. Photoluminescence spectroscopy revealed a particular applied voltage, which depends on concentration and molecular weight, where aggregation of PVK levels off. Luminescence quenching of MEH-PPV is also observed to increase with applied voltage consistent with possible energy transfer from shorter conjugation length segments to nearby longer conjugated segments. The ratio of the intensity of the excitation spectra of the PVK (donor, both PVKLor PVKH) and the MEH-PPV (acceptor), ID/IA, exhibited minima at this particular voltage and then levels off, indicating not only maximum interpenetration and thus compatibility of both polymers but also maximum energy transfer. Hence, we demonstrate that compatibility and energy transfer can be optimized varying concentration and applied voltage during both electrospraying and electrospinning processes.",
author = "Margarita Mondrag{\'o}n and Balderas, {J. Uriel} and Jim{\'e}nez, {G. Lesly} and S{\'a}nchez-Esp{\'i}ndola, {Ma Esther} and Ciro Falcony",
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month = "1",
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doi = "10.1016/j.orgel.2014.08.040",
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Energy transfer and compatibility analysis of PVK/MEH-PPV blends processed via electrospraying and electrospinning. / Mondragón, Margarita; Balderas, J. Uriel; Jiménez, G. Lesly; Sánchez-Espíndola, Ma Esther; Falcony, Ciro.

In: Organic Electronics: physics, materials, applications, 01.01.2014, p. 2993-2999.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Energy transfer and compatibility analysis of PVK/MEH-PPV blends processed via electrospraying and electrospinning

AU - Mondragón, Margarita

AU - Balderas, J. Uriel

AU - Jiménez, G. Lesly

AU - Sánchez-Espíndola, Ma Esther

AU - Falcony, Ciro

PY - 2014/1/1

Y1 - 2014/1/1

N2 - © 2014 Elsevier B.V. All rights reserved. Solution polymer blends of a high molecular weight and a low molecular weight poly(9-vinyl carbazole) PVK with poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), at a fixed blend ratio of 95.5:0.5, were processed via electrospraying and electrospinning. SEM studies revealed that electrosprayed particles were produced when low molecular weight PVK was used, while electrospun fibers were successfully obtained from solutions containing high molecular weight PVK, over a concentration range of 4-10% (w/v). From the absorption spectra of the neat polymers it was determined that Urbach energy Euincrease and optical band gap Egdecreases due to the physical defects along the main chain introduced by these electrostatic processing methods. Photoluminescence spectroscopy revealed a particular applied voltage, which depends on concentration and molecular weight, where aggregation of PVK levels off. Luminescence quenching of MEH-PPV is also observed to increase with applied voltage consistent with possible energy transfer from shorter conjugation length segments to nearby longer conjugated segments. The ratio of the intensity of the excitation spectra of the PVK (donor, both PVKLor PVKH) and the MEH-PPV (acceptor), ID/IA, exhibited minima at this particular voltage and then levels off, indicating not only maximum interpenetration and thus compatibility of both polymers but also maximum energy transfer. Hence, we demonstrate that compatibility and energy transfer can be optimized varying concentration and applied voltage during both electrospraying and electrospinning processes.

AB - © 2014 Elsevier B.V. All rights reserved. Solution polymer blends of a high molecular weight and a low molecular weight poly(9-vinyl carbazole) PVK with poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), at a fixed blend ratio of 95.5:0.5, were processed via electrospraying and electrospinning. SEM studies revealed that electrosprayed particles were produced when low molecular weight PVK was used, while electrospun fibers were successfully obtained from solutions containing high molecular weight PVK, over a concentration range of 4-10% (w/v). From the absorption spectra of the neat polymers it was determined that Urbach energy Euincrease and optical band gap Egdecreases due to the physical defects along the main chain introduced by these electrostatic processing methods. Photoluminescence spectroscopy revealed a particular applied voltage, which depends on concentration and molecular weight, where aggregation of PVK levels off. Luminescence quenching of MEH-PPV is also observed to increase with applied voltage consistent with possible energy transfer from shorter conjugation length segments to nearby longer conjugated segments. The ratio of the intensity of the excitation spectra of the PVK (donor, both PVKLor PVKH) and the MEH-PPV (acceptor), ID/IA, exhibited minima at this particular voltage and then levels off, indicating not only maximum interpenetration and thus compatibility of both polymers but also maximum energy transfer. Hence, we demonstrate that compatibility and energy transfer can be optimized varying concentration and applied voltage during both electrospraying and electrospinning processes.

U2 - 10.1016/j.orgel.2014.08.040

DO - 10.1016/j.orgel.2014.08.040

M3 - Article

SP - 2993

EP - 2999

JO - Organic Electronics: physics, materials, applications

JF - Organic Electronics: physics, materials, applications

SN - 1566-1199

ER -