Influence of photoelectric parameters for AZO transparent conductive films on electromagnetic scattering characteristics

LIU Zhan-he; WANG Xiao-lu; JI Jin-zu; WANG Jing; HUANG Pei-lin; ZHOU Peng

doi:10.13374/j.issn2095-9389.2018.10.014

Volume 40 Issue 10

Oct. 2018

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2018 > 40(10): 1259-1266

LIU Zhan-he, WANG Xiao-lu, JI Jin-zu, WANG Jing, HUANG Pei-lin, ZHOU Peng. Influence of photoelectric parameters for AZO transparent conductive films on electromagnetic scattering characteristics[J]. Chinese Journal of Engineering, 2018, 40(10): 1259-1266. doi: 10.13374/j.issn2095-9389.2018.10.014

Citation:

LIU Zhan-he, WANG Xiao-lu, JI Jin-zu, WANG Jing, HUANG Pei-lin, ZHOU Peng. Influence of photoelectric parameters for AZO transparent conductive films on electromagnetic scattering characteristics[J]. Chinese Journal of Engineering, 2018, 40(10): 1259-1266. doi: 10.13374/j.issn2095-9389.2018.10.014

Citation:

LIU Zhan-he, WANG Xiao-lu, JI Jin-zu, WANG Jing, HUANG Pei-lin, ZHOU Peng. Influence of photoelectric parameters for AZO transparent conductive films on electromagnetic scattering characteristics[J]. Chinese Journal of Engineering, 2018, 40(10): 1259-1266. doi: 10.13374/j.issn2095-9389.2018.10.014

PDF( 1246 KB)

Influence of photoelectric parameters for AZO transparent conductive films on electromagnetic scattering characteristics

doi: 10.13374/j.issn2095-9389.2018.10.014

1) School of Aeronautic Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;
2) School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
3) School of Electronics and Communication Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China

Received Date: 2017-11-03

Abstract

Abstract

Al-doped zinc oxide (AZO) transparent conductive films with different sheet resistances were deposited on the surface of float glass by a room temperature coating technique. The procedure for radar cross section (RCS) measurements for AZO transparent conductive films was established, and the definition of the relative reflectivity based on the RCS mean value was proposed. The electromagnetic scattering characteristics for the AZO transparent conductive films were analyzed by way of the sheet resistance and visible light transmittance. The AZO films with different sheet resistances were tested in the microwave darkroom and RCS curves for the films were obtained with incident frequencies of 10 GHz and 15 GHz and in the HH and VV polarizations modes. The characteristics of the RCS curve distribution in angular domains of 20° and 60° in the nose direction and the characteristics of RCS mean values were analyzed to study the stealth performance for aircraft cockpit glasses. The influence of the sheet resistance on RCS relative reflectivity and visible light transmittance was studied based on RCS test results from the AZO transparent conductive films. When the sheet resistance was small, the distribution of the RCS curves was similar to that of their corresponding metal. When the sheet resistance increased, the RCS mean values in the angular domains of 20° and 60° in the nose direction decreased and the stealth performance was reduced. In addition, the RCS relative reflectivity decreased and the visible light transmittance increased. The rate of the decrease in the relative reflectivity was related to the sheet resistance. It was determined that an appropriate sheet resistance can meet the needs of stealth and lighting simultaneously. The results achieved from darkroom test also proved that upon meeting the requirement of visible light transmittance for aircraft cockpit glasses, the AZO transparent conductive film could provide shaped stealth performance when the value of sheet resistance was between 18 Ω to 45 Ω. When the sheet resistance was 18 Ω, the best performance of AZO appears with a relative reflectivity, Re_m² of 84% and Re_dB of 0.73 dB.
- Al-doped zinc oxide (AZO),
- film,
- electromagnetic scattering,
- stealth,
- radar cross section (RCS)

FullText(HTML)

References(13)

References

[1]	Li Y, Wu Z, Huang P L, et al. A new method for analyzing integrated stealth ability of penetration aircraft. Chin J Aeron, 2010, 23(2):187
[2]	Perino A, Orta R, Barla G. Wave propagation in discontinuous media by the scattering matrix method. Rock Mech Rock Eng, 2012, 45(5):901
[5]	Liu Z H, Huang P L, Gao X, et al. Multi-frequency RCS reduction characteristics of shape stealth with MLFMA with improved MMN. Chin J Aeron, 2010, 23(3):327
[7]	Liu Z H, Huang P L, Wu Z, et al. Improvement and performance of parallel multilevel fast multipole algorithm. J Syst Eng Electron, 2011, 22(1):164
[8]	Yue K Z, Liu W L, Li G X, et al. Numerical simulation of RCS for carrier electronic warfare airplanes. Chin J Aeron, 2015, 28(2):545
[15]	Zhou J, Wu Z, Liu Z H. Optical and electrical properties of TiO₂/Au/TiO₂ multilayer coatings in large area deposition at room temperature. Rare Met, 2008, 27(5):457
[16]	Shi Q, Zhou K S, Dai M J, et al. Room temperature preparation of high performance AZO films by MF sputtering. Ceram Int, 2013, 39(2):1135
[17]	Liu C Y, Xu Z W, Zhang Y F, et al. Effect of annealing temperature on properties of ZnO:Al thin films prepared by pulsed DC reactive magnetron sputtering. Mater Lett, 2015, 139:279
[18]	Sun Y H, Wang H L, Chen J, et al. Structural and optoelectronic properties of AZO thin films prepared by RF magnetron sputtering at room temperature. Trans Nonferrous Met Soc China, 2016, 26(6):1655
[19]	Shen H L, Zhang H, Lu L F, et al. Preparation and properties of AZO thin films on different substrates. Prog Nat Sci Mater Int, 2010, 20:44
[20]	Kaur G, Mitra A, Yadav K L. Pulsed laser deposited Al-doped ZnO thin films for optical applications. Prog Nat Sci Mater Int,2015,25(1):12
[21]	El hamali S O, Cranton W M, Kalfagiannis N, et al. Enhanced electrical and optical properties of room temperature deposited aluminium doped zinc oxide (AZO) thin films by excimer laser annealing. Opt Lasers Eng, 2016, 80:45
[22]	Patel K H, Rawal S K. Influence of power and temperature on properties of sputtered AZO films. Thin Solid Films, 2016, 620:182