The origin of the abnormal photovoltaic effect in bismuth ferrite thin films, which causes voltages larger than the band gap, is poorly understood. Bhatnagar et al.show that this effect can be attributed to a bulk photovoltaic effect and that it can be enhanced by controlling domain wall conductivity.
- Akash Bhatnagar
- Ayan Roy Chaudhuri
- Marin Alexe
