Postproduction Annealing Effect on Solar Cells Based on Polymer and Zinc Oxide Nanorod Composites

摘要

In this work, we study the effect of postproduction annealing on the polymer-ZnO-nanorod solar cells. The morphological, crystalline, optical and electrical properties of devices are investigated. The experimental results show that the postproduction annealing treatment worsens the performance of solar cells. The device without postproduction annealing has a power conversion efficiency (PCE) of 1.06% under Air Mass 1.5, 100-mW/cm{sup}2 illumination. After postproduction annealing at 150°C for 3 minutes, PCE decreased from 1.06 to 0.31%. The reduction of PCE results from the poor infiltration of the photoactive layer and the broken electron transport path in ZnO nanorod. Therefore, postproduction annealing treatment is not effective in the BHJ polymer-ZnO-nanorod solar cells.