Analysis of photoluminescence, UV absorbance, optical band gap and threshold voltage of TiO2 nanoparticles dispersed in high birefringence nematic liquid crystal towards its application in display and photovoltaic devices.
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| Title: | Analysis of photoluminescence, UV absorbance, optical band gap and threshold voltage of TiO2 nanoparticles dispersed in high birefringence nematic liquid crystal towards its application in display and photovoltaic devices. |
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| Authors: | Pathak, G.1, Pandey, S.1, Katiyar, R.1, Srivastava, A.1, Dabrowski, R.2, Garbat, K.2, Manohar, R.1 rajiv.manohar@gmail.com |
| Source: | Journal of Luminescence. Dec2017, Vol. 192, p33-39. 7p. |
| Subjects: | Photoluminescence, Photonic band gap structures, Titanium dioxide nanoparticles, Nematic liquid crystals, Birefringence |
| Abstract: | In the present work anatase TiO 2 nanoparticles (NPs) have been dispersed into the pure nematic liquid crystal (NLC) 2020 which is consisted of fluorinated 4'-alkylphenyl-4-isothiocyanatotolanes, in different concentration. The dispersion of TiO 2 NPs in NLC induces photoluminescence what is an important finding of this study. It has also been found that the dispersion of TiO 2 NPs reduces the UV absorbance of pure NLC. Optical band gap has been calculated and found to be decreased for the dispersed system as compared to pure NLC. The presence of TiO 2 NPs affects the molecular dynamics of the NLC molecules, which has been proved by the Fourier transformed infrared spectroscopy (FTIR). Relative electric permittivity and dielectric anisotropy have been found to be decreased for the dispersed system as compared to the pure NLC. The trapping capability of TiO 2 NPs is also confirmed by the independent measurement of threshold voltage. The value of threshold voltage has decreased after dispersion of NPs in the pure NLC. This decrement is due to the property of TiO 2 NPs to reduce the ionic contribution, thereby, increasing the net field of the system. The induction of photoluminescence in a non photoluminescent material with the help of TiO 2 nanoparticle along with reduced band gap are the main findings of the present work. It is suggested that the output of the present work may be very useful in various display and photonic applications as well as in photovoltaic devices. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Luminescence is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 125704004 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Analysis of photoluminescence, UV absorbance, optical band gap and threshold voltage of TiO2 nanoparticles dispersed in high birefringence nematic liquid crystal towards its application in display and photovoltaic devices. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pathak%2C+G%2E%22">Pathak, G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pandey%2C+S%2E%22">Pandey, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Katiyar%2C+R%2E%22">Katiyar, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Srivastava%2C+A%2E%22">Srivastava, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dabrowski%2C+R%2E%22">Dabrowski, R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Garbat%2C+K%2E%22">Garbat, K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Manohar%2C+R%2E%22">Manohar, R.</searchLink><relatesTo>1</relatesTo><i> rajiv.manohar@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Luminescence%22">Journal of Luminescence</searchLink>. Dec2017, Vol. 192, p33-39. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Photonic+band+gap+structures%22">Photonic band gap structures</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide+nanoparticles%22">Titanium dioxide nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Nematic+liquid+crystals%22">Nematic liquid crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Birefringence%22">Birefringence</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In the present work anatase TiO 2 nanoparticles (NPs) have been dispersed into the pure nematic liquid crystal (NLC) 2020 which is consisted of fluorinated 4'-alkylphenyl-4-isothiocyanatotolanes, in different concentration. The dispersion of TiO 2 NPs in NLC induces photoluminescence what is an important finding of this study. It has also been found that the dispersion of TiO 2 NPs reduces the UV absorbance of pure NLC. Optical band gap has been calculated and found to be decreased for the dispersed system as compared to pure NLC. The presence of TiO 2 NPs affects the molecular dynamics of the NLC molecules, which has been proved by the Fourier transformed infrared spectroscopy (FTIR). Relative electric permittivity and dielectric anisotropy have been found to be decreased for the dispersed system as compared to the pure NLC. The trapping capability of TiO 2 NPs is also confirmed by the independent measurement of threshold voltage. The value of threshold voltage has decreased after dispersion of NPs in the pure NLC. This decrement is due to the property of TiO 2 NPs to reduce the ionic contribution, thereby, increasing the net field of the system. The induction of photoluminescence in a non photoluminescent material with the help of TiO 2 nanoparticle along with reduced band gap are the main findings of the present work. It is suggested that the output of the present work may be very useful in various display and photonic applications as well as in photovoltaic devices. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Luminescence is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jlumin.2017.06.021 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 33 Subjects: – SubjectFull: Photoluminescence Type: general – SubjectFull: Photonic band gap structures Type: general – SubjectFull: Titanium dioxide nanoparticles Type: general – SubjectFull: Nematic liquid crystals Type: general – SubjectFull: Birefringence Type: general Titles: – TitleFull: Analysis of photoluminescence, UV absorbance, optical band gap and threshold voltage of TiO2 nanoparticles dispersed in high birefringence nematic liquid crystal towards its application in display and photovoltaic devices. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pathak, G. – PersonEntity: Name: NameFull: Pandey, S. – PersonEntity: Name: NameFull: Katiyar, R. – PersonEntity: Name: NameFull: Srivastava, A. – PersonEntity: Name: NameFull: Dabrowski, R. – PersonEntity: Name: NameFull: Garbat, K. – PersonEntity: Name: NameFull: Manohar, R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00222313 Numbering: – Type: volume Value: 192 Titles: – TitleFull: Journal of Luminescence Type: main |
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