Photodetection
Our optical sensing activities aspire to lead to the next generation of photodetectors, thermal sensors and image sensors operating in the MWIR/LWIR at an affordable cost enabling applications in safety and security, environmental monitoring, and food/process quality inspection at a consumer level.
To expand the wavelength range of colloidal quantum dot photodetectors we leverage intersubband transitions that we can access by having developed robust heavily doped CQD thin films. We then further engineer the CQDs at a single nanocrystalline level as well as the suprananocrystalline level to enable efficient harnessing of intraband-excited carriers for high performance photodetectors.
Related Publications
Mid- and long-wave infrared optoelectronics via intraband transitions in PbS colloidal quantum dots I. Ramiro, O. Özdemir, S. Christodoulou, S. Gupta, M. Dalmases, I. Torre, G. Konstantatos Nano Lett. 20, 1003-1008 (2020)
Ultrasensitive all-2D MoS2 phototransistors enabled by an out-of-plane MoS2 PN homojunction N. Huo, G. Konstantatos Nature Commun. 8, 572 (2017)
Broadband image sensor array based on graphene–CMOS integration S. Goossens, G. Navickaite, C. Monasterio, S. Gupta, J. J. Piqueras, R. Pérez, G. Burwell, I. Nikitskiy, T. Lasanta, T. Galán, E. Puma, A. Centeno, A. Pesquera, A. Zurutuza, G. Konstantatos, F. Koppens Nature Photon. 11, 366-371 (2017)
MoS2–HgTe quantum dot hybrid photodetectors beyond 2 µm N. Huo, S. Gupta, G. Konstantatos Adv. Mater. 29, 1606576 (2017)
Integrating an electrically active colloidal quantum dot photodiode with a graphene phototransistor I. Nikitskiy, S. Goossens, D. Kufer, T. Lasanta, G. Navickaite, F. H. L. Koppens, G. Konstantatos Nature Commun. 7, 11954 (2016)