Organic position sensitive photodetectors

Dr. Juan Cabanillas, Prof. Feng Luo, Dr. Miguel Angel Niño & Dr.Paolo Perna

Funding : Chinese Scholarship Council Call 2011

Duration: 2012 - 2016

60 months

This research line aims at developing organic photodetectors based on multilayer small molecules which deliver a linear change in hotocurrent depending on the position of the impinging light on the pixel. The idea to produce spatial tuning of photocurrent in one single pixel exploits optical interference in multilayer structures as well as antibatic photocurrent response [1]. We have recently developed devices able to monitor lateral displacements with a spatial sensitivity close to 500 mm [2].

[1] J. Cabanillas-González and M. Campoy-Quiles, PCT/ES2011/070841.
[2] J. Cabanillas-González et al., Appl. Phys. Lett. 99, 103305 (2011).

Figure. (Left) Optical modelling of the in-depth distribution of light across a multilayer photodetector. (Right) Dependence of photocurrent as a function of position.