@inproceedings{b21485169dd746aba6198715ba28d799,
title = "Sharp/Tuneable UVC Selectivity and Extreme Solar Blindness in Nominally Grown Undoped Ga2O3MSM Photodetectors by Pulsed Laser Deposition",
abstract = "Ga2O3layers were grown on c-sapphire substrates by pulsed laser deposition. Optical transmission spectra were coherent with a bandgap engineering from 4.9 to 6.2 eV controlled via the growth conditions. X-ray diffraction revealed that the films were mainly β-Ga2O3(monoclinic) with strong (-201) orientation. Metal-Semiconductor-Metal photodetectors based on gold/nickel Inter- Digitated-Transducer structures were fabricated by single-step negative photolithography. 240 nm peak response sensors gave over 2 orders-of-magnitude of separation between dark and light signal with state-of-the-art solar and visible rejection ratios ((I240 : I290) of > 3 x 105 and (I240 : I400) of > 2 x 106) and dark signals of <50 pA (at a bias of -5V). Spectral responsivities showed an exceptionally narrow linewidth (16.5 nm) and peak values exhibited a slightly superlinear increase with applied bias up to a value of 6.5 A/W (i.e. a quantum efficiency of > 3000%) at 20V bias.",
author = "Rogers, {D. J.} and A. Courtois and Teherani, {F. H.} and Sandana, {V. E.} and P. Bove and X. Arrateig and L. Dam and P. Maso and M. Meftah and {El Huni}, W. and Y. Sama and H. Bouhnane and S. Gautier and A. Ougazzaden and M. Razeghi",
note = "Funding Information: The authors acknowledge the EU Horizon 2020 SME Instrument program and the French Agence National de la Recherche for financial support. We are also grateful to Nanotronics for providing the NSPEC wafer inspection tool. We would also like to thank Dr Cosmin Romanitan of IMT Bucharest (Romania) and Dr Mircea Modreanu of Tyndall University (Ireland) for the XRD measurements. Publisher Copyright: {\textcopyright} 2021 SPIE. All rights reserved.; Oxide-Based Materials and Devices XII 2021 ; Conference date: 06-03-2021 Through 11-03-2021",
year = "2021",
doi = "10.1117/12.2596194",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Rogers, {David J.} and Look, {David C.} and Teherani, {Ferechteh H.}",
booktitle = "Oxide-Based Materials and Devices XII",
}