Diffuse Reflectance Enhancement through Wrinkling of Nanoscale Thin Films

나노스케일 박막의 표면주름 형성을 통한 산란반사도 향상

Kim, Yun Young

  • Received : 2015.06.22
  • Accepted : 2015.10.01
  • Published : 2015.12.01


This study investigated the reflection spectra of wrinkled metal/polymer multilayers. A wavy surface was self-assembled by annealing an aluminum-coated poly(methyl metacrylate) layer on a silicon substrate. The total and diffuse reflectance characteristics of the sample with additional metal coatings(aluminum or silver) were evaluated in the visible wavelength(400~800 nm) using a spectrophotometer. The results showed that the wrinkled surface enhanced the diffuse reflectance up to 40~50% in the lower-wavelength range, demonstrating its potential for applications to optical thin-film devices.


Diffuse Reflectance;Thin-Film;Wrinkle


  1. Allen, H. G., 1969, Analysis and design of structural sandwich panels, Pergamon, New York, Ch. 8
  2. Yoon, J. S., Chang, S., Yoo, Y. -E. and Choi, D. -S.,2010, "An Experimental Study on Fabrication of Micro Patterns from Surface Wrinkling of Photoresist Layer," Proc. KSME 2010 Annual Fall Meeting, pp. 4294-4297.
  3. Kang, S. H., Na, J. -H., Moon, S. N. and Lee, W. I., 2010, "Self-organized Anisotropic Wrinkle Structures by Plasma Treatment of an Aligned Liquid Crystalline Polymer," Proc. KSME 2010 Annual Fall Meeting, pp. 4236-4239.
  4. Choi, H. -J., Kim, J. -H., Lee, H. -J., Lee, J. -H., Kim, K. -S. and Lee. H. -J., 2007, "A Study on Estimating Elastic Modulus of Nano-scale Metal Thin Films on a Polymeric Substrate," Proc. KSME Annual Fall Meeting, pp. 12-16.
  5. Cho, J. -S., Baek, S. and Lee, J. C., 2011, "Surface Texturing of Sputtered ZnO:A1/Ag Back Reflectors for Flexible Silicon Thin-film Solar Cells," Sol. Energy Mater. Sol. Cells, Vol. 95, No. 7, pp. 1852-1858.
  6. Berger, P., Hauser, H., Suwito, D., Janz, S., Peters, M., Blasi, B. and Hermle, M., 2010, "Realization and Evaluation of Diffractive Systems on the Back Side of Silicon Solar Cells," Proc. SPIE, Vol. 77255, No.772504.
  7. Volynskii, A. L., Bazhenov, S., Lebedeva, O. V., and Bakeev, N. F., 2000, "Mechanical Buckling Instability of Thin Coatings Deposited on Soft Polymer Substrates," J. Mater. Sci. Vol. 35, No. 3, pp. 547-554.
  8. Bowden, N., Brittain, S., Evans, A. G., Hutchinson, J. W. and Whitesides, G. M., 1998, "Spontaneous Formation of Ordered Structures in Thin Films of Metals Supported on an Elastomeric Polymer," Nature, Vol. 393, No. 14, pp. 146-149.
  9. Fay, S., Dubail, S., Kroll, U., Meier, J., Ziegler, Y. and Shah, A., 2000, "Light Trapping Enhancement for Thin-film silicon Solar Cells by Roughness Improvement ZNO Front TCO," Proc. 16th EU PVSEC, pp. 361-365.


Supported by : 동의대학교