The influence of microstructure on the electrochromic properties of LixWO3 films: Part II. Limiting mechanisms in coloring and bleaching processes

Abstract

Various factors affecting the coloring and bleaching processes of LixWO3 films have been studied. The rate of the coloring process is limited by the decreasing electromotive force in the LixWO3 film and by the components of the series circuit resistance, including the electrolyte resistance and the diffusion impedance within the film. The bleaching process in a thick film is limited by either the space charge or by the diffusion impedance, depending on the experimental conditions. A more complete and quantitative model of the coloring/bleaching process has been developed and shows good agreement with experimental results. Our analysis also indicates that the lithium concentration value of x near the LixWO3/electrolyte interface can greatly exceed its reversible limit during the coloring process, even though the average x value within the film remains much lower than the reversible limit. This phenomenon may introduce some irreversible structural changes in the film, which in turn may constitute one of the film’s degradation mechanisms.

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References

  1. 1

    S.K. Deb, Philos. Mag. 27, 801 (1973).

    CAS  Article  Google Scholar 

  2. 2

    S. K. Deb, Solar Energy Mater. 25, 327 (1992).

    CAS  Article  Google Scholar 

  3. 3

    R.S. Crandall and B.W. Faughnan, Appl. Phys. Lett. 28, 95 (1976).

    CAS  Article  Google Scholar 

  4. 4

    B. W. Faughnan, R. S. Crandall, and M. A. Lampert, Appl. Phys. Lett. 27, 275 (1975).

    CAS  Article  Google Scholar 

  5. 5

    B. W. Faughnan and R. S. Crandall, in Display Devices, edited by J.I. Pankove (Springer-Verlag, New York, 1980).

  6. 6

    B. Reichman and A.J. Bard, J. Electrochem. Soc. 127, 647 (1980).

    CAS  Article  Google Scholar 

  7. 7

    H.M. Gupta and G.F. Ferreira, J. Appl. Phys. 50, 5036 (1979).

    CAS  Article  Google Scholar 

  8. 8

    L. Zhang and K.S. Goto, Thin Solid Films 101, 67 (1988).

    Article  Google Scholar 

  9. 9

    A. R. Haranahalli and P. H. Holloway, J. Elect. Mater. 10, 141 (1981).

    CAS  Article  Google Scholar 

  10. 10

    A. W. Czanderna and C. M. Lampert, Evaluation Criteria and Test Methods for Electrochromic Windows, SERI/TP-255-3537 (1990).

  11. 11

    M. Green and J. A. Weiner, Thin Solid Films 38, 89 (1976).

    CAS  Article  Google Scholar 

  12. 12

    S. K. Mohapatra, J. Electrochem. Soc. 125, 284 (1978).

    CAS  Article  Google Scholar 

  13. 13

    J. Nagai and T. Kamimori, Jpn. J. Appl. Phys. 22, 681 (1983).

    CAS  Article  Google Scholar 

  14. 14

    O. Bohnke, M. Rezrazi, B. Vuillemin, C. Bohnke, P. A. Gillet, and C. Rousselot, Solar Energy Mater, and Solar Cells 25, 361 (1992).

    CAS  Article  Google Scholar 

  15. 15

    J-G. Zhang, C. E. Tracy, D. K. Benson, and S. K. Deb, J. Mater. Res. 8, 2649 (1993).

    CAS  Article  Google Scholar 

  16. 16

    I. D. Raistrick and R. A. Huggins, Solid State Ionics 7, 213 (1982).

    CAS  Article  Google Scholar 

  17. 17

    H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids (Clarendon Press, Oxford, 1959).

  18. 18

    D. K. Benson, C. E. Tracy, J. S. E. M. Svensson, and B. E. Liebert, in Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VI, SPIE 823, 72 (1987).

  19. 19

    C. Ho, I.D. Raistrick, and R.A. Huggins, J. Electrochem. Soc. 127, 343 (1980).

    CAS  Article  Google Scholar 

  20. 20

    P. Kuhfitting, Introduction to the Laplace Transform (Plenum Press, New York, 1978).

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Correspondence to Ji-Guang Zhang.

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Zhang, JG., Benson, D.K., Tracy, E.C. et al. The influence of microstructure on the electrochromic properties of LixWO3 films: Part II. Limiting mechanisms in coloring and bleaching processes. Journal of Materials Research 8, 2657–2667 (1993). https://doi.org/10.1557/JMR.1993.2657

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