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Electrical and optical behaviors of La-doped BaSnO3 thin film

Fei Xiao Luo Bing-Cheng Jin Ke-Xin Chen Chang-Le

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Electrical and optical behaviors of La-doped BaSnO3 thin film

Fei Xiao, Luo Bing-Cheng, Jin Ke-Xin, Chen Chang-Le
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  • La-doped BaSnO3 is regarded as a very essential material to construct transparent perovskite devices due to its super high electrical mobility in perovskite transparent conducting oxides. For understanding the high electrical mobility, the effective mass of the carrier in La-doped BaSnO3 is a critical factor and should be determined. In this work, the performances of epitaxial La-doped BaSnO3 thin films grown on (LaAlO3)0.3 (SrAl0.5Ta0.5O3)0.7 (001) substrate by radio-frequency (RF) magnetron sputtering technique are investigated. The electrical properties (resistivity, carrier density, mobility and Seebeck coefficient) and the optical transmittance are analyzed. In addition, it is proved from both the Hall effect and thermoelectric power measurements that the La-doped BaSnO3 thin films are n-type degenerate semiconductor. At 300 K, the resistivity, carrier density, mobility and Seebeck coefficient are 0.987 mΩ·cm, 2.584×1020 cm-3, 24.49 cm2·V-1·s-1 and 45.71 μV/K, respectively. The electron effective mass ~ 0.31m0 (m0, the free electron mass) is extracted by combining the Seebeck coefficient and carrier density. Ba0.99La0.01SnO3 (BLSO) thin film exhibits a high optical transmittance of 73% in the visible spectral region. In order to derive the band-gap energy, the complex dielectric constant, and the film thickness, the transmittance spectrum is simulated based on the dielectric model comprising the band-gap transition (O'Leary-Johnson-Lim model) and free electron excitation (Drude-Lorentz model). The band-gap energy, exponential band tail and thickness of the BLSO thin film are 3.43 eV, 0.27 eV and 781.2 nm, respectively. Wavelength-dependence of complex dielectric function of the BLSO thin film is also obtained from the fitted line. Additionally, the parameters (optical carrier density and mobility) resulting from the optical measurement are in agreement with the results from the electrical measurement, which supports the calculated electron effective mass aforementioned.
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 51202195, 51172183, 61471301) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2014JQ6218).
    [1]

    Huang H 2010 Nat. Photon. 4 134

    [2]

    Chen Y Z, Nini P, Sun J R, Shen B G, Soren L 2013 Chin. Phys. B 22 116803

    [3]

    Yao X, Ding Y L, Zhang X D, Zhao Y 2015 Acta Phys. Sin. 64 038805 (in Chinese) [姚鑫, 丁艳丽, 张晓丹, 赵颖 2015 物理学报 64 038805]

    [4]

    Zhang T, Yin J, Zhao G F, Zhang W F, Xia Y D, Liu Z G doi:10.1088/1674-1056/23/8/087304

    [5]

    Wang H F, Liu Q Z, Chen F, Gao G Y, Wu W B, Chen X H 2007 J. Appl. Phys. 101 106105

    [6]

    Kim H J, Kim U, Kim H M, Kim T H, Mun H S, Jeon B G, Hong K T, Lee W J, Ju C, Kim K H, Char K 2012 Appl. Phys. Express 5 061102

    [7]

    Liu Q Z, Liu J J, Li B, Li H, Zhu G P, Dai K, Liu Z L, Zhang P, Dai J M 2012 Appl. Phys. Lett. 101 241901

    [8]

    Shan C, Huang T, Zhang J Z, Han M J, Li Y W, Hu Z G, Chu J H 2014 J. Phys. Chem. C 118 6994

    [9]

    Wei R H, Tang X W, Hui Z Z, Luo X, Dai J M, Yang J, Song W H, Chen L, Zhu X G, Zhu X B, Sun Y P 2015 Appl. Phys. Lett. 106 101906

    [10]

    Mizoguchi H, Chen P, Boolchand P, Ksenofontov V, Felser C, Barnes P W, Woodward P M DOI: 10.1021/cm4019309

    [11]

    Tan X Y, Chen C L, Jin K X 2011 Acta Phys. Sin. 60 107105 (in Chinese) [谭兴毅, 陈长乐, 金克新 2011 物理学报 60 107105]

    [12]

    Hadjarab B, Bouguelia A, Trari M 2007 J. Phys. D: Appl. Phys. 40 5833

    [13]

    Seo D, Yu K, Chang Y J, Sohn E, Kim K H, Choi E J 2014 Appl. Phys. Lett. 104 022102

    [14]

    Xing S M, Shan C, Jiang K, Zhu J J, Li Y W, Hu Z G, Chu J H 2015 J. Appl. Phys. 117 103107

    [15]

    Kim H J, Kim U, Kim T H, Kim J, Kim H M, Jeon B G, Lee W J, Mun H S, Hong K T, Yu J, Char K, Kim K H 2012 Phys. Rev. B 86 165205

    [16]

    Luo B C, Wang J, Cao X S, Jin K X 2014 Phys. Status Solidi A 211 705

    [17]

    Luo B C, Zhang J, Wang J, Ran P X 2015 Ceram. Int. 41 2668

    [18]

    Coutts T J, Young D L, Li X N 2000 MRS Bull. 25 58

    [19]

    Mergel D, Qiao Z 2002 J. Phys. D: Appl. Phys. 35 794

    [20]

    O'Leary S K, Johnson S R, Lim P K 1997 J. Appl. Phys. 82 3334

    [21]

    Luo B C, Chen C L, Jin K X, Zhou C C 2011 Thin Solid Films 519 3632

    [22]

    Mun H, Kim U, Kim H M, Park C, Kim T H, Kim H J, Kim K H, Char K 2013 Appl. Phys. Lett. 102 252105

  • [1]

    Huang H 2010 Nat. Photon. 4 134

    [2]

    Chen Y Z, Nini P, Sun J R, Shen B G, Soren L 2013 Chin. Phys. B 22 116803

    [3]

    Yao X, Ding Y L, Zhang X D, Zhao Y 2015 Acta Phys. Sin. 64 038805 (in Chinese) [姚鑫, 丁艳丽, 张晓丹, 赵颖 2015 物理学报 64 038805]

    [4]

    Zhang T, Yin J, Zhao G F, Zhang W F, Xia Y D, Liu Z G doi:10.1088/1674-1056/23/8/087304

    [5]

    Wang H F, Liu Q Z, Chen F, Gao G Y, Wu W B, Chen X H 2007 J. Appl. Phys. 101 106105

    [6]

    Kim H J, Kim U, Kim H M, Kim T H, Mun H S, Jeon B G, Hong K T, Lee W J, Ju C, Kim K H, Char K 2012 Appl. Phys. Express 5 061102

    [7]

    Liu Q Z, Liu J J, Li B, Li H, Zhu G P, Dai K, Liu Z L, Zhang P, Dai J M 2012 Appl. Phys. Lett. 101 241901

    [8]

    Shan C, Huang T, Zhang J Z, Han M J, Li Y W, Hu Z G, Chu J H 2014 J. Phys. Chem. C 118 6994

    [9]

    Wei R H, Tang X W, Hui Z Z, Luo X, Dai J M, Yang J, Song W H, Chen L, Zhu X G, Zhu X B, Sun Y P 2015 Appl. Phys. Lett. 106 101906

    [10]

    Mizoguchi H, Chen P, Boolchand P, Ksenofontov V, Felser C, Barnes P W, Woodward P M DOI: 10.1021/cm4019309

    [11]

    Tan X Y, Chen C L, Jin K X 2011 Acta Phys. Sin. 60 107105 (in Chinese) [谭兴毅, 陈长乐, 金克新 2011 物理学报 60 107105]

    [12]

    Hadjarab B, Bouguelia A, Trari M 2007 J. Phys. D: Appl. Phys. 40 5833

    [13]

    Seo D, Yu K, Chang Y J, Sohn E, Kim K H, Choi E J 2014 Appl. Phys. Lett. 104 022102

    [14]

    Xing S M, Shan C, Jiang K, Zhu J J, Li Y W, Hu Z G, Chu J H 2015 J. Appl. Phys. 117 103107

    [15]

    Kim H J, Kim U, Kim T H, Kim J, Kim H M, Jeon B G, Lee W J, Mun H S, Hong K T, Yu J, Char K, Kim K H 2012 Phys. Rev. B 86 165205

    [16]

    Luo B C, Wang J, Cao X S, Jin K X 2014 Phys. Status Solidi A 211 705

    [17]

    Luo B C, Zhang J, Wang J, Ran P X 2015 Ceram. Int. 41 2668

    [18]

    Coutts T J, Young D L, Li X N 2000 MRS Bull. 25 58

    [19]

    Mergel D, Qiao Z 2002 J. Phys. D: Appl. Phys. 35 794

    [20]

    O'Leary S K, Johnson S R, Lim P K 1997 J. Appl. Phys. 82 3334

    [21]

    Luo B C, Chen C L, Jin K X, Zhou C C 2011 Thin Solid Films 519 3632

    [22]

    Mun H, Kim U, Kim H M, Park C, Kim T H, Kim H J, Kim K H, Char K 2013 Appl. Phys. Lett. 102 252105

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Publishing process
  • Received Date:  02 June 2015
  • Accepted Date:  25 June 2015
  • Published Online:  05 October 2015

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