In this article, we have proposed a nanostructured photovoltaic device based on the ZnO nanostructures/poly(3-hexylthiophene)(P3HT):TiO 2 nanorod hybrid by solution processes at low temperature. An array of ZnO nanorods with a larger size of ∼50 nm in diameter and ∼180 nm in length are grown to provide direct pathways for efficient charge collection. TiO 2 nanorods with a size of ∼5 nm in diameter and ∼20-30 nm in length are incorporated into polymers to facilitate charge separation and transport by providing an increased interfacial area and a more effective transport pathway. The device performance with the inclusion of TiO 2 nanorods exhibits a seven times increase in the short circuit current with respect to that without TiO 2 nanorods. The device performance can be further enhanced after completely removing the residual surfactant on the TiO 2 nanorods using the ligand exchange method, giving a short circuit current density of 2.67 mA cm -2 and a power conversion efficiency of 0.59% under Air Mass 1.5 (100 mW cm -2 ) illumination.
All Science Journal Classification (ASJC) codes
- Materials Chemistry