Effects of potential and temperature on the electrodeposited porous zinc oxide films

Abstract

Porous ZnO films were prepared by electrodeposition method in zinc nitrate aqueous solution using ITO glass covered with polystyrene sphere (PS) colloidal crystal arrays as substrates. The preparation procedure includes two parts: deposition of ZnO in the interstices of the colloidal crystals and subsequent removal of the PS templates. The influences of deposition potential and temperature on the ZnO films were investigated. The ordered, uniform porous ZnO films with optical transmittance of approximately 63.6% at 600 nm could be obtained when the deposition potential and temperature were −1.1 V and 70 °C, respectively. The optical band gap energy increased along with the absolute deposition potential and temperature, ranging from 3.33 to 3.43 eV and from 3.35 to 3.42 eV, respectively.

Keywords

porous ZnO film / electrodeposition / template / band gap energy

References

[1] Ismail B., Abaab M. A., Rezig B. Structural and Electrical Properties of ZnO Films Prepared by Screen Printing Technique[J]. Thin Solid Films, 2001, 383: 92-94.

[2] Ramamoorthy K., Arivanandhan M., Sankaranarayanan K. Highly Textured ZnO Thin Films: A Novel Economical Preparation and Approachment for Optical Devices, UV Lasers and Green LEDS[J]. Mater. Chem. Phys., 2004, 85(2): 257-262.

[3] Wacogne B., Roe M. P., Pattinson T. J., . Effective Piezoelectric Activity of Zinc Oxide Films Grown by Radio-frequency Planar Magnetron Sputtering[J]. Appl. Phys. Lett., 1995, 67: 1 674-1 676.

[4] Barker A., Crowther S., Rees D. Room-temperature r.f. Magnetron Sputtered ZnO for Electromechanical Devices[J]. Sens. Actuators A, 1997, 583: 229-235.

[5] Jacobs H., Mokawa W., Kohl D., . Preparation of a Pd/ZnO (0001) Model Catalyst and Its Characterization by AES, LEED and UHV Reaction Studies[J]. Surf. Sci., 1985, 160(1): 217-234.

[6] Karuppuchamy S., Yoshida T., Sugiura T. Self-assembly of ZnO/riboflavin 5′-phosphate Thin Films by One-step Electrodeposition and its Characterization[J]. Thin Solid Films, 2001, 397(1): 63-69.

[7] Keis K., Magnusson E., Lindstrom H., . A 5% Efficient Photo Electrochemical Solar Cell Based on Nanostructured ZnO Electrodes[J]. Sol. Energy Mater. Sol. Cells, 2002, 73: 51-58.

[8] Bartlett P. N., Baumberg J. J., Birkin P. R., . Highly Ordered Macroporous Gold and Platinum Films Formed by Electrochemical Deposition Through Templates Assembled from Submicron Diameter Monodisperse Polystyrene Spheres[J]. Chem. Mater., 2002, 14(5): 2 199-2 208.

[9] Park S., Xia Y. Macroporous Membranes with Highly Ordered and Three-dimensionally Interconnected Spherical Pores[J]. Adv. Mater., 1998, 10(13): 1 045-1 048.

[10] Yan H., Blanford C. F., Holland B. T., . General Synthesis of Periodic Macroporous Solids by Templated Salt Precipitation and Chemical Conversion[J]. Chem. Mater., 2000, 124: 1 134-1 141.

[11] Subramanian G., Manoharan V. N., Thorne J. D., . Ordered Macroporous Materials by Colloidal Assembly: A Possible Route to Photonic Bandgap Materials[J]. Adv. Mater., 1999, 11: 1 261-1 265.

[12] Liu Z. F., Jin Z. G., Qiu J. J., . Preparation and Characteristics of Ordered Porous ZnO Films by Electrodeposition Method Using PS Array Templates[J]. Semicond. Sci. Technol., 2006, 21: 60-67.

[13] Liu Z. F., Ya J., Xin Y., . Assembly of Polystyrene Colloidal Crystal Templates by a Dip-drawing Method[J]. J. Cryst. Growth, 2006, 297: 223-227.

[14] Yoshida T., Komatsu D., Shimokawa N., . Mechanism of Cathodic Electrodeposition of Zinc Oxide Thin Films from Aqueous Zinc Nitrate Baths[J]. Thin Solid Films, 2004, 451: 166-169.

[15] Yamamoto T., Shiosaki T., Kawabata A. Characterization of ZnO Piezoelectric Films Prepared by rf Planar-magnetron Sputtering[J]. J. Appl. Phys., 1980, 51: 3 113-3 120.

[16] Marotti R. E., Guerra D. N., Bello C., . Bandgap Energy Tuning of Electrochemically Grown ZnO Thin Films by Thickness and Electrodeposition Potential[J]. Sol. Energy Mater. Sol. Cells, 2004, 82: 85-103.