Strong Photocurrent from Two-Dimensional Excitons from Stacked Perovskite Semiconductor Sheets


Room-temperature photocurrent measurements in two-dimensional (2D) inorganic–organic perovskite devices reveal that excitons strongly contribute by 100-fold. A further 10-fold gain is found when TiO2 nanoparticles are directly integrated into the perovskite layers, although the 2D exciton semiconducting layers are not significantly disrupted. These results show that strong excitonic materials may be useful as photovoltaic materials and suggest mechanisms to better understand the photovoltaic properties of the related three-dimensional perovskites.

Contact details: 

Dr. G. Vijaya Prakash

Department of Physics