Application of ZnO with Different Morphologies to DSSCs

Tuesday, 7 October 2014: 09:20
Expo Center, 2nd Floor, Gama Room (Moon Palace Resort)
F. I. Lizama-Tzec, G. Rodriguez-Gattorno (Cinvestav-Mérida), U. Pal (Instituto de Física, Benemérita Universidad Autónoma de Puebla), and G. Oskam (Cinvestav-Mérida)
ZnO is an attractive material for the fabrication of dye-sensitized solar cells (DSSCs) related to its good electron transport properties. It can be synthesized with different morphologies relatively easily by methods such as electrodeposition, sol-gel, either using forced hydrolysis or a microwave-assisted method [1].

There is a growing interest in linking the crystallographic planes of the material to performance of the solar cell. In this work, ZnO with different morphologies was obtained by the microwave-assisted technique at pH values of 5.5. 8, 10 and 12, and the materials were applied in the fabrication of DSSCs using the screen printing technique after preparing a paste. The surface area of the powders was characterized by BET, and the deposited ZnO layers were characterized by XRD, TEM and SEM. The cells were characterized by I-V curves and the amount of adsorbed dye was determined by UV-Vis spectrophotometry. It was found that the best cells were obtained with the morphology that resulted in the synthesis at pH 10, where the (100) plane is predominant.


1.         N. Morales-Flores, R. Galeazzi, E. Rosendo, T. Díaz, S. Velumani and U. Pal. Morphology control and optical properties of ZnO nanostructures grown by ultrasonic synthesis. Advances in Nano Research, Vol. 1, No. 1 (2013) 59-70.

Figure 1:  SEM images of the different morphologies of the ZnO nanomaterials