The long-term thermal stability of organic photovoltaic device has been emerged as a crucial characteristic to satisfy the demand of industry requiring lifespan of 20 year. In this paper, etched indium-tin-oxide (ITO) nanoelectrodes are employed to enhance the thermal stability and power conversion efficiency in poly(3hexylthiophene):methanofullerene bulk-heterojunction solar cells. A simple etching process for the ITO electrode was carried out using a hydrochloric acid solvent in order to significantly increase the roughness of the ITO surface. This nanostructured ITO not only induced efficient light harvesting, but also acted as a barrier that suppressed the PCBM phase separation, resulting in the lifespan increased from 33 h to 77 h during thermal annealing.
Bibliographical noteFunding Information:
This research was supported by a National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and future Planning, Korea (MSIP, NRF-2012R1A2A1A01003537) and Global Frontier grant funded by Center for Advanced Soft Electronics under the Global Frontier Research Program of the Ministry of Science, ICT and future Planning, Korea (MSIP, NRF-2012M3A6A5055744).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering