Advanced Methods of Semiconductor Research Seminar – 15th of April 2025
We cordially invite you to Advanced Methods of Semiconductor Research Seminar on Tuesday 15th of April 2025 at 13:15 in room 321, building A-1, where there will be delivered a lecture:
Towards Greener Detection: Self-Powered Photodetectors Based on a Ferro-Pyro-Phototronic Effect
by Adrian Kaim
from Department of Experimental Physics, Wrocław Tech
Lecture abstract:
The rapidly growing number of photodetectors integrated into everyday devices may contribute significantly to global energy consumption. To address this, researchers are exploring alternative designs that operate effectively without the need for external biasing voltage. One promising approach involves synergistically combining multiple phenomena, — such as photovoltaic, pyroelectric, ferroelectric or plasmonic effects — within a single device. Cost effective and non-toxic oxide materials, like pyroelectric ZnO or ferroelectric BCZT (0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3) can be used to introduce those effects into the structure.
In this lecture the working principle of a pyro-phototronic and a ferro-pyro-phototronic detector will be discussed. The impact of introducing a ferroelectric layer into the pyro-phototronic structure — specifically, the influence of its polarization on key parameters such as responsivity and detectivity — will be presented. To further enhance performance, the device is modified by incorporating plasmonic silver nanoparticles. Interestingly, the placement of these particles within the device can dramatically alter its behavior, either emphasizing or suppressing ferroelectric hysteresis. The underlying mechanism responsible for this effect will also be explored.
