Development of Ultra-Thin TiO2 Coated WO3 Inverse Opal Photoelectrode for Dye-Sensitized Solar Cells

염료감응형 태양전지로의 응용을 위한 얇은 TiO2가 코팅 된 WO3 역오팔 광전극의 개발

Arunachalam, Maheswari;Kwag, Seoui;Lee, Inho;Kim, Chung Soo;Lee, Sang-Kwon;Kang, Soon Hyung

  • Received : 2019.07.10
  • Accepted : 2019.07.29
  • Published : 2019.08.27


In this study, we prepare pure $WO_3$ inverse opal(IO) film with a thickness of approximately $3{\mu}m$ by electrodeposition, and an ultra-thin $TiO_2$ layer having a thickness of 2 nm is deposited on $WO_3$ IO film by atomic layer deposition. Both sets of photoelectrochemical properties are evaluated after developing dye-sensitized solar cells(DSSCs). In addition, morphological, crystalline and optical properties of the developed films are evaluated through field-emission scanning electron microscopy(FE-SEM), High-resolution transmission electron microscopy(HR-TEM), X-ray diffraction(XRD) and UV/visible/infrared spectrophotometry. In particular, pure $WO_3$ IO based DSSCs show low $V_{OC}$, $J_{SC}$ and fill factor of 0.25 V, $0.89mA/cm^2$ and 18.9 %, achieving an efficiency of 0.04 %, whereas the $TiO_2/WO_3$ IO based DSSCs exhibit $V_{OC}$, $J_{SC}$ and fill factor of 0.57 V, $1.18mA/cm^2$ and 50.1 %, revealing an overall conversion efficiency of 0.34 %, probably attributable to the high dye adsorption and suppressed charge recombination reaction.


dye-sensitized solar cell;$WO_3$;atomic layer deposition;$TiO_2$;inverse opal


  1. B. O'Regan and M. Gratzel, Nature, 353, 737 (1991).
  2. A. Yella, H. -W. Lee, H. N. Tsao, C. Yi, S. M. Zakeeruddin and M. Gratzel, Science, 334, 629 (2011).
  3. M. McCune, W. Zhang and Y. Deng, Nano Lett., 12, 3656 (2012).
  4. R. Ghosh, M. K. Brennaman, T. Uher, M.-R. Ok, E. T. Samulski, L. E. McNeil, T. J. Meyer and R. Lopez, ACS Appl. Mater. Interfaces, 3, 10 (2010).
  5. S. Burnside, J. -E. Moser, K. Brooks, M. Gratzel and D. Cahen, J. Phys. Chem. B, 103, 9328 (1999).
  6. H. Zheng, Y. Tachibana and K. Kalantar-zadeh, Langmuir, 26, 19148 (2010).
  7. S. H. Kang, S. -H. Choi, M. -S. Kang, J. -Y. Kim, H. -S. Kim, T. Hyeon and Y. -E. Sung, Adv. Mater., 20, 54 (2008).
  8. Y. O. Kim, S. -H. Yu, K. -S. Ahn, S. K. Lee and S. H. Kang, J. Electroanal. Chem., 752, 25 (2015).
  9. H. S. Lee, R. Kubrin, R. Zierold, A. Y. Petrov, K. Nielsch, G. A. Schneider and M. Eich, Opt. Mater. Express, 3, 1007 (2013).
  10. G. Yun, M. Arunachalam and S. H. Kang, J. Phys. Chem. C, 120, 5906 (2016).
  11. F. M. Rajab, J. Miner. Mater. Charact. Eng., 2, 169 (2014).
  12. J. Gong, K. Sumathy, Q. Qiao and Z. Zhou, Renew. Sustainable Energy Rev., 68, 234 (2017).
  13. M. D. Brown, T. Suteewong, R. S. S. Kumar, V. D'Innocenzo, A. Petrozza, M. M. Lee, U. Wiesner and H. J. Snaith, Nano Lett., 11, 438 (2011).
  14. X. Hu and H. Wang, Front. Optoelectronics, 11, 285 (2018).


Supported by : National Research Foundation of Korea (NRF)