Sol-gel process ZnO thin film as the electron transport layer in inverted polymer solar cell

Abstract

In this paper, we used sol-gel derived ZnO solution of different molar ratio of ethanolamine with low temperature process deposited on ITO substrate as the electron transport layer (ETL) in inverted polymer solar cells (IPSCs). We found through a detailed analysis of less ethanolamine and low-temperature process ZnO thin film, which gives both high transparency and comparative literature has a simple process and control the film surface morphology, and low-temperature process of flexible, this increases the short-circuit density from 7.01 to 8.20mA/cm2 at an annealing temperature of 150°C for 10min. The flexible IPSCs exhibit a PCE of 2.48 to 3.17% for poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PC61BM) blend film as the active layer under simulated AM1.5G illumination of 100mW/cm2.