Nanoscale geometric electric field enhancement in organic photovoltaics
Pegg, Lara-Jane and Hatton, Ross A.. (2012) Nanoscale geometric electric field enhancement in organic photovoltaics. ACS Nano, Vol.6 (No.6). pp. 4722-4730. ISSN 1936-0851Full text not available from this repository.
Official URL: http://dx.doi.org/10.1021/nn3007042
Generic design rules for electrode–organic semiconductor contacts that transcend specific materials are urgently required to guide the development of new electrodes and provide a framework for engineering this important class of interface. Herein a novel nanostructured window electrode is utilized in conjunction with three-dimensional electrostatic modeling to elucidate the importance of geometric electric field enhancement effects at the electrode interfaces in organic photovoltaics. The results of this study show that nanoscale protrusions at the electrode surfaces in organic photovoltaics dramatically improve the efficiency of photogenerated charge carrier extraction to the external circuit and that the origin of this improvement is the local amplification of the electrostatic field in the vicinity of said protrusions. This wholly geometric approach to engineering electrodes at the nanoscale is materials generic and can be employed to enhance the efficiency of charge carrier injection or extraction in a wide range of organic electronic devices.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Science > Chemistry
Faculty of Science > Physics
|Journal or Publication Title:||ACS Nano|
|Publisher:||American Chemical Society|
|Number of Pages:||9|
|Page Range:||pp. 4722-4730|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Engineering and Physical Science Research Council and Royal Academy of Engineering|
1. Brabec, C. J., Gowrisanker, S., Halls, J. J. M., Laird, D., Jia, S., Williams, S. P. Polymer-Fullerene Bulk-Heterojunction Solar Cells. Adv. Mater. 2010, 22, 3839-3856.
Actions (login required)