Hot-compress: A new postdeposition treatment for ZnO-based flexible dye-sensitized solar cells

摘要

This article introduces a new postdeposition treatment named hot-compress for flexible zinc oxide-base dye-sensitized solar cells. This postdeposition treatment includes the application of compression pressure at an elevated temperature. The optimum compression pressure of 130 Ma at an optimum compression temperature of 70 degrees C heating gives better photovoltaic performance compared to the conventional cells. The aptness of this method was confirmed by investigating scanning electron microscopy image, X-ray diffraction, current-voltage and electrochemical impedance spectroscopy analysis of the prepared cells. Proper heating during compression lowers the charge transport resistance, longer the electron lifetime of the device. As a result, the overall power conversion efficiency of the device was improved about 45% compared to the conventional room temperature compressed cell. (C) 2016 Elsevier Ltd. All rights reserved.