About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Energy Materials for Sustainable Development
|
Presentation Title |
Effect of A-Site Substitution on the Photovoltaic Properties of Bismuth Ferrite |
Author(s) |
Marcel Habrik, Simon Petrick, Holger Röhm, Alexander Colsmann |
On-Site Speaker (Planned) |
Marcel Habrik |
Abstract Scope |
The semiconducting properties of bismuth ferrite (BiFeO3) and its derivatives are promising for photovoltaic applications. The versatile perovskite structure (ABX3) of BiFeO3 allows the tuning of its electrical and optical properties via A-site and B-site substitution. Here, we investigate partial A-site substitution by calcium in order to enhance the charge carrier transport in BiFeO3. In contrast to earlier studies, where BiFeO3 was deposited in vacuum, in this work, an aqueous metal nitrate route is employed to obtain Bi(1-x)Ca(x)FeO3 thin films. Solution processing is a simple and fast method to evaluate the effect of elemental substitution on the optical and electrical properties. The light-harvesting layers are incorporated into a photovoltaic multilayer heterostructure of functional oxides and electrodes. Best photovoltaic performance is achieved after electrical poling of the solar cell. |