Optical band-gap narrowing in perovskite ferroelectric ABO3 ceramics (A=Pb, Ba; B=Ti) by ion substitution technique

Wenliang Zhou; Hongmei Deng; Lu Yu; Pingxiong Yang; Junhao Chu

doi:10.1016/j.ceramint.2015.07.127

Optical band-gap narrowing in perovskite ferroelectric ABO₃ ceramics (A=Pb, Ba; B=Ti) by ion substitution technique

Wenliang Zhou, Hongmei Deng, Lu Yu, Pingxiong Yang, Junhao Chu

School of Physics and Electronic Science

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

39 Scopus citations

Abstract

Band-gap narrowing effects have been observed in and Ni-doped PbTiO₃ and Ni-doped Ba(Ti_0.875Ce_0.125)O₃ ferroelectric ceramics. Structural characterizations and microstructural analysis show that the as-prepared PbTi_0.67Ni_0.33O_3−δ (PTN) and Ba(Ti_0.75Ce_0.125Ni_0.125)O_3−δ (BTCN) samples exhibit polycrystalline perovskite structures with dense microstructures. The Ni doping at Ti-site results in lattice expansion and introduces oxygen vacancies. Note that the band-gap values of PTN and BTCN are 2.42 eV and 2.73 eV, respectively, much smaller than that of corresponding parent PbTiO₃ (3.21 eV) and BaTiO₃ (3.37 eV) materials. This optical behavior can be due to new states of both the highest occupied molecular orbital and the lowest unoccupied molecular orbital in an electronic structure with the presence of Ni. With such decreased optical band-gaps, the PTN and BTCN materials will have great potential in solar-energy conversion devices.

Original language	English
Pages (from-to)	13389-13392
Number of pages	4
Journal	Ceramics International
Volume	41
Issue number	10
DOIs	https://doi.org/10.1016/j.ceramint.2015.07.127
State	Published - Dec 2015

Keywords

C. Optical properties
Ferroelectric ceramics
Lattice expansion
Oxygen vacancies

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10.1016/j.ceramint.2015.07.127

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@article{76b9886654994834bdac6af7a1b2cb73,

title = "Optical band-gap narrowing in perovskite ferroelectric ABO3 ceramics (A=Pb, Ba; B=Ti) by ion substitution technique",

abstract = "Band-gap narrowing effects have been observed in and Ni-doped PbTiO3 and Ni-doped Ba(Ti0.875Ce0.125)O3 ferroelectric ceramics. Structural characterizations and microstructural analysis show that the as-prepared PbTi0.67Ni0.33O3−δ (PTN) and Ba(Ti0.75Ce0.125Ni0.125)O3−δ (BTCN) samples exhibit polycrystalline perovskite structures with dense microstructures. The Ni doping at Ti-site results in lattice expansion and introduces oxygen vacancies. Note that the band-gap values of PTN and BTCN are 2.42 eV and 2.73 eV, respectively, much smaller than that of corresponding parent PbTiO3 (3.21 eV) and BaTiO3 (3.37 eV) materials. This optical behavior can be due to new states of both the highest occupied molecular orbital and the lowest unoccupied molecular orbital in an electronic structure with the presence of Ni. With such decreased optical band-gaps, the PTN and BTCN materials will have great potential in solar-energy conversion devices.",

keywords = "C. Optical properties, Ferroelectric ceramics, Lattice expansion, Oxygen vacancies",

author = "Wenliang Zhou and Hongmei Deng and Lu Yu and Pingxiong Yang and Junhao Chu",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd and Techna Group S.r.l.",

year = "2015",

month = dec,

doi = "10.1016/j.ceramint.2015.07.127",

language = "英语",

volume = "41",

pages = "13389--13392",

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TY - JOUR

T1 - Optical band-gap narrowing in perovskite ferroelectric ABO3 ceramics (A=Pb, Ba; B=Ti) by ion substitution technique

AU - Zhou, Wenliang

AU - Deng, Hongmei

AU - Yu, Lu

AU - Yang, Pingxiong

AU - Chu, Junhao

PY - 2015/12

Y1 - 2015/12

N2 - Band-gap narrowing effects have been observed in and Ni-doped PbTiO3 and Ni-doped Ba(Ti0.875Ce0.125)O3 ferroelectric ceramics. Structural characterizations and microstructural analysis show that the as-prepared PbTi0.67Ni0.33O3−δ (PTN) and Ba(Ti0.75Ce0.125Ni0.125)O3−δ (BTCN) samples exhibit polycrystalline perovskite structures with dense microstructures. The Ni doping at Ti-site results in lattice expansion and introduces oxygen vacancies. Note that the band-gap values of PTN and BTCN are 2.42 eV and 2.73 eV, respectively, much smaller than that of corresponding parent PbTiO3 (3.21 eV) and BaTiO3 (3.37 eV) materials. This optical behavior can be due to new states of both the highest occupied molecular orbital and the lowest unoccupied molecular orbital in an electronic structure with the presence of Ni. With such decreased optical band-gaps, the PTN and BTCN materials will have great potential in solar-energy conversion devices.

AB - Band-gap narrowing effects have been observed in and Ni-doped PbTiO3 and Ni-doped Ba(Ti0.875Ce0.125)O3 ferroelectric ceramics. Structural characterizations and microstructural analysis show that the as-prepared PbTi0.67Ni0.33O3−δ (PTN) and Ba(Ti0.75Ce0.125Ni0.125)O3−δ (BTCN) samples exhibit polycrystalline perovskite structures with dense microstructures. The Ni doping at Ti-site results in lattice expansion and introduces oxygen vacancies. Note that the band-gap values of PTN and BTCN are 2.42 eV and 2.73 eV, respectively, much smaller than that of corresponding parent PbTiO3 (3.21 eV) and BaTiO3 (3.37 eV) materials. This optical behavior can be due to new states of both the highest occupied molecular orbital and the lowest unoccupied molecular orbital in an electronic structure with the presence of Ni. With such decreased optical band-gaps, the PTN and BTCN materials will have great potential in solar-energy conversion devices.

KW - C. Optical properties

KW - Ferroelectric ceramics

KW - Lattice expansion

KW - Oxygen vacancies

UR - https://www.scopus.com/pages/publications/84938224815

U2 - 10.1016/j.ceramint.2015.07.127

DO - 10.1016/j.ceramint.2015.07.127

M3 - 文章

AN - SCOPUS:84938224815

SN - 0272-8842

VL - 41

SP - 13389

EP - 13392

JO - Ceramics International

JF - Ceramics International

IS - 10

ER -

Optical band-gap narrowing in perovskite ferroelectric ABO₃ ceramics (A=Pb, Ba; B=Ti) by ion substitution technique

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Keywords

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