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Title: Manipulation of Optical Transmittance by Ordered-Oxygen-Vacancy in Epitaxial LaBaCo2O5.5+δ Thin Films

Abstract

Giant optical transmittance changes of over 300% in wide wavelength range from 500 nm to 2500 nm were observed in LaBaCo2O5.5+δ thin films annealed in air and ethanol ambient, respectively. The reduction process induces high density of ordered oxygen vacancies and the formation of LaBaCo2O5.5 (δ = 0) structure evidenced by aberration-corrected transmission electron microscopy. Moreover, the first-principles calculations reveal the origin and mechanism of optical transmittance enhancement in LaBaCo2O5.5 (δ = 0), which exhibits quite different energy band structure compared to that of LaBaCo2O6 (δ = 0.5). The discrepancy of energy band structure was thought to be the direct reason for the enhancement of optical transmission in reducing ambient. Thus, LaBaCo2O5.5+δ thin films show great prospect for applications on optical gas sensors in reducing/oxidizing atmosphere.

Authors:
 [1];  [1];  [2];  [1];  [3];  [4];  [5];  [6]
  1. Xi'an Jiaotong Univ., Xi'an (China). School of Electronic and Information Engineering
  2. Chinese Academy of Sciences, Changchun (China). Changchun Inst. of Optics, Fine Mechanics and Physics and State Key Lab. of Luminescence and Applications
  3. Xidian Univ., Xi'an (China). School of Microelectronics and State Key Discipline Lab. of Wide Band Gap Semiconductor Technology
  4. Xi'an Jiaotong Univ., Xi'an (China). State Key Lab. for Mechanical Behavior of Materials
  5. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Physics, Applied Physics, and Astronomy
  6. Univ. of Texas, San Antonio, TX (United States). Dept. of Physics and Astronomy; Univ. of Houston, TX (United States). The Texas Center for Superconductivity
Publication Date:
Research Org.:
Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Org.:
USDOE; National Natural Science Foundation of China (NSFC); National Basic Research Program of China
OSTI Identifier:
1430215
Grant/Contract Number:  
SC0002623; 51202185; 51390472; 51501143; 2015CB654903; 11504368; 51572211; 51202176
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; 47 OTHER INSTRUMENTATION; Electronic properties and materials

Citation Formats

Cheng, Sheng, Lu, Jiangbo, Han, Dong, Liu, Ming, Lu, Xiaoli, Ma, Chunrui, Zhang, Shengbai, and Chen, Chonglin. Manipulation of Optical Transmittance by Ordered-Oxygen-Vacancy in Epitaxial LaBaCo2O5.5+δ Thin Films. United States: N. p., 2016. Web. doi:10.1038/srep37496.
Cheng, Sheng, Lu, Jiangbo, Han, Dong, Liu, Ming, Lu, Xiaoli, Ma, Chunrui, Zhang, Shengbai, & Chen, Chonglin. Manipulation of Optical Transmittance by Ordered-Oxygen-Vacancy in Epitaxial LaBaCo2O5.5+δ Thin Films. United States. https://doi.org/10.1038/srep37496
Cheng, Sheng, Lu, Jiangbo, Han, Dong, Liu, Ming, Lu, Xiaoli, Ma, Chunrui, Zhang, Shengbai, and Chen, Chonglin. 2016. "Manipulation of Optical Transmittance by Ordered-Oxygen-Vacancy in Epitaxial LaBaCo2O5.5+δ Thin Films". United States. https://doi.org/10.1038/srep37496. https://www.osti.gov/servlets/purl/1430215.
@article{osti_1430215,
title = {Manipulation of Optical Transmittance by Ordered-Oxygen-Vacancy in Epitaxial LaBaCo2O5.5+δ Thin Films},
author = {Cheng, Sheng and Lu, Jiangbo and Han, Dong and Liu, Ming and Lu, Xiaoli and Ma, Chunrui and Zhang, Shengbai and Chen, Chonglin},
abstractNote = {Giant optical transmittance changes of over 300% in wide wavelength range from 500 nm to 2500 nm were observed in LaBaCo2O5.5+δ thin films annealed in air and ethanol ambient, respectively. The reduction process induces high density of ordered oxygen vacancies and the formation of LaBaCo2O5.5 (δ = 0) structure evidenced by aberration-corrected transmission electron microscopy. Moreover, the first-principles calculations reveal the origin and mechanism of optical transmittance enhancement in LaBaCo2O5.5 (δ = 0), which exhibits quite different energy band structure compared to that of LaBaCo2O6 (δ = 0.5). The discrepancy of energy band structure was thought to be the direct reason for the enhancement of optical transmission in reducing ambient. Thus, LaBaCo2O5.5+δ thin films show great prospect for applications on optical gas sensors in reducing/oxidizing atmosphere.},
doi = {10.1038/srep37496},
url = {https://www.osti.gov/biblio/1430215}, journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 6,
place = {United States},
year = {Wed Nov 23 00:00:00 EST 2016},
month = {Wed Nov 23 00:00:00 EST 2016}
}

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