Optical and Electrical Properties of P-Type N-Doped ZnO Film

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Abstract:

Since ZnO is a wide band gap (3.37 eV) semiconductor with a large exitonic binding energy (60 meV), it has been considered as a candidate for various applications, such as ultraviolet (UV) light emitting diodes and laser diodes. For the applications of ZnO-based optoelectronic devices, it is necessary to produce n and p type ZnO films with the high quality. Since ZnO is naturally n-type semiconductor material due to intrinsic defects, such as oxygen vacancies, zinc interstitials, etc., it is easy to produce n-type ZnO with high quality. However, it is difficult to produce low-resistive and stable p-type ZnO due to its asymmetric doping limitations and the self-compensation effects of the intrinsic defects. According to the theoretical studies, p-type ZnO can be realized using group-V dopants substituting for O, such as N, P and As. Among them, N has been suggested to be an effective acceptor dopant candidate to achieve p-type ZnO, because that nitrogen has a much smaller ionic size than P and As and the energy level of substitutional NO is lower than that of substitutional PO and AsO. Transparent p-type ZnO: N thin films have been fabricated using the pulsed laser deposition method at deposition temperatures 800 °C under the O2 and N2 mixing pressure 6Pa. N-doped ZnO films were deposited on sapphire substrate using metallic zinc (99.999%) as target. The structural, optical and electrical properties of the films were examined by XRD, UV-visit spectra and Hall effect measurement. We found that thin film contain the hexagonal ZnO structure. The Hall effect measurement revealed that the carrier concentration is 5.84×1018 1/ cm3, and Hall mobility is 0.26 cm2/Vs, electrical resistivity is 4.12ohm-cm. Film thickness is 180nm. Besides, Visible light transmittance is more than 80%, and calculative band-gap is 3.1 eV, which is lower than ZnO.

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Key Engineering Materials (Volumes 609-610)

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113-117

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April 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] H. Lu, Y. Tu, X. Lin, B. Fang, D. Luo, A. Laaksonen, Materials Letters[J] 64 (2010) 2072–(2075).

Google Scholar

[2] Y.J. Chen, Y.Y. Shih, C.H. Ho, J.H. Du, Y.P. Fu, Ceramics International[J] 36 (2010) 69–73.

Google Scholar

[3] G.H. Lee, Ceramics International[J] 36 (2010) 1871–1875.

Google Scholar

[4] Z. Yan, Y. Ma, P. Deng, Z. Yu, C. Liu, Z. Song, Applied Surface Science[J] 256 (2010) 2289–2292.

Google Scholar

[5] S.B. Zhang, S.H. Wei, A. Zunger, Physical Review B[J] 63 (2001) 075205–075212.

Google Scholar

[6] X.H. Wanga,B. Yao C.X. Cong Z.P. Wei D.Z. Shen Z.Z. Zhang, B.H. Li, Y.M. Lu, D.X. Zhao, J.Y. Zhang, X.W. Fan, Thin Solid Films[J] 518(2010)3428–3431.

DOI: 10.1016/j.tsf.2009.12.007

Google Scholar

[7] N.H. Erdogan, K. Kara,H. Ozdamar, H. Kavak,R. Esen, H. Karaagac, Journal of Alloys and Compounds[J]509(2011)8922–8926.

DOI: 10.1016/j.jallcom.2011.06.048

Google Scholar

[8] Y.J. Zeng Z.Z. Ye,Y.F. Lu,J.G. Lu,W.Z. Xu,L.P. Zhu, B.H. Zhao,Y. Che, Chemical Physics Letters [J] 441(2007) 115–118.

DOI: 10.1016/j.cplett.2007.04.089

Google Scholar

[9] J. Jiang L.P. Zhu J.R. Wang X.Q. Gu,X.H. Pan Y.J. Zeng, Z.Z. Ye, MaterialsLetters[J] 62 (2008) 536–538.

Google Scholar

[10] V. Vaithianathana Y.H. Lee B.T. Lee,S. Hishita,S. Kim, JournalofCrystal Growth[J] 287(2006) 85–88.

Google Scholar

[11] H.K. Choi J.H. Park S.H. Jeong B.T. Lee, Semiconductor Science and Technology[J] 24(2009) 105003–105007.

Google Scholar

[12] X. Pan,Z. Ye,J. Li,X. Gu,Y. Zeng,H. He,L. Zhu,Y. Che, Applied Surface Science[J] 253(2007) 5067–5069.

DOI: 10.1016/j.apsusc.2006.11.014

Google Scholar

[13] M.A. Myers J.H. Lee,Z. Bi,H. Wang, Journal of Physics: Condensed Matter[J] 24(2012) 145802–145809.

Google Scholar

[14] D. Wang,J. Zhou,G. Liu, Journal of Alloy sand Compounds[J] 481 (2009) 802–805.

Google Scholar

[15] W. Bin, Z. Yue, M. Jiahua, S. Wenbin, Applied Physics A[J] 94 (2009) 715–718.

Google Scholar

[16] N. Fujimura, T. Nishihara, S. Goto, J. Xu, T. Ito, Journal of Crystal Growth [J] 130 (1993) 269–279.

Google Scholar

[17] C.L. Kuo, C.L. Wang, H.H. Ko, W.S. Hwang, K. Chang, W.L. Li, H.H. Huang, Y.H. Chang, M.C. Wang, Ceramics Inter- national[J] 36 (2010) 693–698.

Google Scholar

[18] R. Swapna, M.C. Santhosh Kumar, Ceramics International [J] 38 (2012) 3875–3883.

Google Scholar

[19] R. Swapna, M.C. Santhosh Kumar, Ceramics International [J] 39 (2013) 1799–1806.

Google Scholar

[20] H. Nian, S.H. Hahn, K.K. Koo, E.W. Shin, E.J. Kim, Materials Letters [J] 63 (2009) 2246–2248.

Google Scholar