Time dynamics of self-pumped reflection gratings in a photorefractive polymer

P. P. Banerjee; S. H. Buller; C. M. Liebig; S. A. Basun; G. Cook; D. R. Evans; P. A. Blanche; J. Thomas; C. W. Christenson; N. Peyghambarian

doi:10.1063/1.3672832

Time dynamics of self-pumped reflection gratings in a photorefractive polymer

P. P. Banerjee, S. H. Buller, C. M. Liebig, S. A. Basun, G. Cook, D. R. Evans, P. A. Blanche, J. Thomas, C. W. Christenson, N. Peyghambarian

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8 Scopus citations

Abstract

The time dynamics of self-pumped reflection gratings in a commonly used photorefractive polymer PDCST:PVK:ECZ-BBP:C ₆₀ with no additional electron sources or traps is investigated. While holes are normally the mobile charges and responsible for grating formation, our experimental observations, analyzed using multi-exponential fitting curves, show evidence of electrons in addition to holes as charge carriers, particularly above an applied field of 40 V/μm. The dependence of effective carrier mobilities on the applied electric field, deduced from experimental results, show stronger field dependence of electron mobility at high electric fields. At an applied field of 70 V/μm, electron and hole mobilities become approximately equal, and the contribution of electrons on grating formation becomes significant.

Original language	English (US)
Article number	013108
Journal	Journal of Applied Physics
Volume	111
Issue number	1
DOIs	https://doi.org/10.1063/1.3672832
State	Published - Jan 1 2012

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.3672832

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title = "Time dynamics of self-pumped reflection gratings in a photorefractive polymer",

abstract = "The time dynamics of self-pumped reflection gratings in a commonly used photorefractive polymer PDCST:PVK:ECZ-BBP:C 60 with no additional electron sources or traps is investigated. While holes are normally the mobile charges and responsible for grating formation, our experimental observations, analyzed using multi-exponential fitting curves, show evidence of electrons in addition to holes as charge carriers, particularly above an applied field of 40 V/μm. The dependence of effective carrier mobilities on the applied electric field, deduced from experimental results, show stronger field dependence of electron mobility at high electric fields. At an applied field of 70 V/μm, electron and hole mobilities become approximately equal, and the contribution of electrons on grating formation becomes significant.",

author = "Banerjee, {P. P.} and Buller, {S. H.} and Liebig, {C. M.} and Basun, {S. A.} and G. Cook and Evans, {D. R.} and Blanche, {P. A.} and J. Thomas and Christenson, {C. W.} and N. Peyghambarian",

note = "Funding Information: The authors acknowledge the support of AFOSR/RSA. P.P.B. acknowledges support from Azimuth Corp. and ASEE during his sabbatical to the Air Force Research Laboratory from the University of Dayton.",

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doi = "10.1063/1.3672832",

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AU - Banerjee, P. P.

AU - Buller, S. H.

AU - Liebig, C. M.

AU - Basun, S. A.

AU - Cook, G.

AU - Evans, D. R.

AU - Blanche, P. A.

AU - Thomas, J.

AU - Christenson, C. W.

AU - Peyghambarian, N.

N1 - Funding Information: The authors acknowledge the support of AFOSR/RSA. P.P.B. acknowledges support from Azimuth Corp. and ASEE during his sabbatical to the Air Force Research Laboratory from the University of Dayton.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The time dynamics of self-pumped reflection gratings in a commonly used photorefractive polymer PDCST:PVK:ECZ-BBP:C 60 with no additional electron sources or traps is investigated. While holes are normally the mobile charges and responsible for grating formation, our experimental observations, analyzed using multi-exponential fitting curves, show evidence of electrons in addition to holes as charge carriers, particularly above an applied field of 40 V/μm. The dependence of effective carrier mobilities on the applied electric field, deduced from experimental results, show stronger field dependence of electron mobility at high electric fields. At an applied field of 70 V/μm, electron and hole mobilities become approximately equal, and the contribution of electrons on grating formation becomes significant.

AB - The time dynamics of self-pumped reflection gratings in a commonly used photorefractive polymer PDCST:PVK:ECZ-BBP:C 60 with no additional electron sources or traps is investigated. While holes are normally the mobile charges and responsible for grating formation, our experimental observations, analyzed using multi-exponential fitting curves, show evidence of electrons in addition to holes as charge carriers, particularly above an applied field of 40 V/μm. The dependence of effective carrier mobilities on the applied electric field, deduced from experimental results, show stronger field dependence of electron mobility at high electric fields. At an applied field of 70 V/μm, electron and hole mobilities become approximately equal, and the contribution of electrons on grating formation becomes significant.

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ER -

Time dynamics of self-pumped reflection gratings in a photorefractive polymer

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