Colloidal Quantum Dots-Graphene based Broadband Photodetector

Shuchi Gupta^a, Stijn Goossens^a, Gabriele Navickaite^a, Carles Monasterio^a, Juan José Piqueras^a, Raúl Pérez^a, Gregory Burwell^d, Ivan Nikitskiy^a, Tania Lasanta^a, Teresa Galán^a, Eric Puma^a, Alba Centeno^b, Amaia Pesquera^b, Amaia Zurutuza^b, Frank Koppens^a^,^c, Gerasimos Konstantatos^a^,^c

^aICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Avinguda Carl Friedrich Gauss, 3, Castelldefels, Spain

^bGraphenea SA, Tolosa Hiribidea 76, Donostia - San Sebastian, Spain

^cInstitució Catalana de Recerca i Estudis Avançats (ICREA), Spain, Passeig Lluis Companys 23, Barcelona, Spain

^dCentre for NanoHealth, Swansea University, United Kingdom

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Fall Meeting 2018 (NFM18)

S4 Nanophotonics by Nanocrystals

Torremolinos, Spain, 2018 October 22nd - 26th

Organizers: Daniel Vanmaekelbergh and Zeger Hens

Oral, Shuchi Gupta, presentation 134
DOI: https://doi.org/10.29363/nanoge.nfm.2018.134
Publication date: 6th July 2018

Semiconductor colloidal quantum dots (QDs) offer a realm of opportunities especially, in terms of tuning the band gap, manipulating the trap states in a very precise manner, controlling their electronic doping character and their ease of manufacturing and processing in devices. Moreover, when combined with 2D materials, the resultant structures can be used for a diverse range of applications offering photodetectors with exceptionally high responsivity and sensitivity.¹ During my presentation, I will talk about quantum dot-graphene hybrid photodetector devices for food inspection, spectrometers, imaging purposes, monitoring vital health parameters and night vision leveraging the unique opportunity of detecting photons from the UV up to the short-wave infrared in a single material platform. In this photodetector, we make use of the large absorption cross section of QDs and high carrier mobility of graphene to demonstrate our complementary metal-oxide–semiconductors (CMOS) compatible infrared image sensors.² Unlike commercial detectors, the hybrid detector can be used simultaneously in UV, visible and infrared light conditions at room temperature with measured detectivity upto 10¹² Jones. Such detectors exhibit response times of 0.1–1 ms that make them suitable for video frame rate as Stijn Goossenswell as spectrometry applications.

[1] G. Konstantatos, et al., Nature Nanotechnol., 7 (June 2012)

[2] Goossens et al., Nat. Phot. 11 (June 2017)

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