Giant enhancement in ferroelectric polarization under illumination

Hitesh Borkar; Vaibhav Rao; M. Tomar; Vinay Gupta; J. F. Scott; Ashok Kumar

doi:10.1016/j.mtcomm.2017.12.004

Giant enhancement in ferroelectric polarization under illumination

Hitesh Borkar, Vaibhav Rao, M. Tomar, Vinay Gupta, J. F. Scott, Ashok Kumar

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

Abstract

We report optical enhancement in polarization and dielectric constant near room temperature in Pb_0.6Li_0.2Bi_0.2Zr_0.2Ti_0.8O₃ (PLBZT) electro-ceramics; these are doubly substituted members of the most important commercial ferroelectric PbZr_0.2Ti_0.8O₃ (PZT:20/80). Partial (40%) substitution of equal amounts of Li⁺¹ and Bi⁺³ in PZT: 20/80 retains the PZT tetragonal structure with space group P4 mm. Under illumination of white light and weak 405 nm near-ultraviolet laser light (30 mW), an unexpectedly large (200-300%) change in polarization and displacement current was observed. Light also changes the dc conduction current density by one to two orders of magnitude with a large switchable open circuit voltage (V_ocv ∼ 2 V) and short circuit current (J_scc∼ 5 × 10⁻⁸ A). The samples show a photo-current ON/OFF ratio of order 6:1 under illumination of weak light.

Original language	English
Pages (from-to)	116-123
Number of pages	8
Journal	Materials Today Communications
Volume	14
Early online date	16 Dec 2017
DOIs	https://doi.org/10.1016/j.mtcomm.2017.12.004
Publication status	Published - Mar 2018

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10.1016/j.mtcomm.2017.12.004

Scott_2017_MTC_Illumination_AAM
© 2017 Elsevier Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.mtcomm.2017.12.004
Accepted author manuscript, 1.62 MBLicence: CC BY-NC-ND

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@article{beaff9ca8f9743b3abc5d780cfdafb6b,

title = "Giant enhancement in ferroelectric polarization under illumination",

abstract = "We report optical enhancement in polarization and dielectric constant near room temperature in Pb0.6Li0.2Bi0.2Zr0.2Ti0.8O3 (PLBZT) electro-ceramics; these are doubly substituted members of the most important commercial ferroelectric PbZr0.2Ti0.8O3 (PZT:20/80). Partial (40\%) substitution of equal amounts of Li+1 and Bi+3 in PZT: 20/80 retains the PZT tetragonal structure with space group P4 mm. Under illumination of white light and weak 405 nm near-ultraviolet laser light (30 mW), an unexpectedly large (200-300\%) change in polarization and displacement current was observed. Light also changes the dc conduction current density by one to two orders of magnitude with a large switchable open circuit voltage (Vocv ∼ 2 V) and short circuit current (Jscc∼ 5 × 10−8 A). The samples show a photo-current ON/OFF ratio of order 6:1 under illumination of weak light.",

author = "Hitesh Borkar and Vaibhav Rao and M. Tomar and Vinay Gupta and Scott, \{J. F.\} and Ashok Kumar",

note = "AK acknowledges the CSIR-MIST (PSC-0111) project for their financial assistance. Hitesh Borkar would like to acknowledge the UGC (SRF) to provide fellowship to carry out Ph.D program.",

year = "2018",

month = mar,

doi = "10.1016/j.mtcomm.2017.12.004",

language = "English",

volume = "14",

pages = "116--123",

journal = "Materials Today Communications",

issn = "2352-4928",

publisher = "Elsevier",

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TY - JOUR

T1 - Giant enhancement in ferroelectric polarization under illumination

AU - Borkar, Hitesh

AU - Rao, Vaibhav

AU - Tomar, M.

AU - Gupta, Vinay

AU - Scott, J. F.

AU - Kumar, Ashok

N1 - AK acknowledges the CSIR-MIST (PSC-0111) project for their financial assistance. Hitesh Borkar would like to acknowledge the UGC (SRF) to provide fellowship to carry out Ph.D program.

PY - 2018/3

Y1 - 2018/3

N2 - We report optical enhancement in polarization and dielectric constant near room temperature in Pb0.6Li0.2Bi0.2Zr0.2Ti0.8O3 (PLBZT) electro-ceramics; these are doubly substituted members of the most important commercial ferroelectric PbZr0.2Ti0.8O3 (PZT:20/80). Partial (40%) substitution of equal amounts of Li+1 and Bi+3 in PZT: 20/80 retains the PZT tetragonal structure with space group P4 mm. Under illumination of white light and weak 405 nm near-ultraviolet laser light (30 mW), an unexpectedly large (200-300%) change in polarization and displacement current was observed. Light also changes the dc conduction current density by one to two orders of magnitude with a large switchable open circuit voltage (Vocv ∼ 2 V) and short circuit current (Jscc∼ 5 × 10−8 A). The samples show a photo-current ON/OFF ratio of order 6:1 under illumination of weak light.

AB - We report optical enhancement in polarization and dielectric constant near room temperature in Pb0.6Li0.2Bi0.2Zr0.2Ti0.8O3 (PLBZT) electro-ceramics; these are doubly substituted members of the most important commercial ferroelectric PbZr0.2Ti0.8O3 (PZT:20/80). Partial (40%) substitution of equal amounts of Li+1 and Bi+3 in PZT: 20/80 retains the PZT tetragonal structure with space group P4 mm. Under illumination of white light and weak 405 nm near-ultraviolet laser light (30 mW), an unexpectedly large (200-300%) change in polarization and displacement current was observed. Light also changes the dc conduction current density by one to two orders of magnitude with a large switchable open circuit voltage (Vocv ∼ 2 V) and short circuit current (Jscc∼ 5 × 10−8 A). The samples show a photo-current ON/OFF ratio of order 6:1 under illumination of weak light.

UR - http://www.sciencedirect.com/science/article/pii/S2352492817301769#appd002

UR - https://www.scopus.com/pages/publications/85044847374

U2 - 10.1016/j.mtcomm.2017.12.004

DO - 10.1016/j.mtcomm.2017.12.004

M3 - Article

SN - 2352-4928

VL - 14

SP - 116

EP - 123

JO - Materials Today Communications

JF - Materials Today Communications

ER -

Giant enhancement in ferroelectric polarization under illumination

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