Extraordinary linear dynamic range in laser-defined functionalized graphene photodetectors
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/105212
Tipus de documentArticle
Data publicació2017-05-26
EditorScience
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Graphene-based photodetectors have demonstrated mechanical flexibility, large operating bandwidth, and
broadband spectral response. However, their linear dynamic range (LDR) is limited by graphene’s intrinsic
hot-carrier dynamics, which causes deviation from a linear photoresponse at low incident powers. At the same
time, multiplication of hot carriers causes the photoactive region to be smeared over distances of a few micrometers,
limiting the use of graphene in high-resolution applications. We present a novel method for engineering
photoactive junctions in FeCl3-intercalated graphene using laser irradiation. Photocurrent measured at
these planar junctions shows an extraordinary linear response with an LDR value at least 4500 times larger than
that of other graphene devices (44 dB) while maintaining high stability against environmental contamination
without the need for encapsulation. The observed photoresponse is purely photovoltaic, demonstrating
complete quenching of hot-carrier effects. These results pave the way toward the design of ultrathin photodetectors
with unprecedented LDR for high-definition imaging and sensing.
CitacióSanctis, A. D. [et al.]. Extraordinary linear dynamic range in laser-defined functionalized graphene photodetectors. "Scientific Advances", 26 Maig 2017, vol. 3, núm. 5.
ISSN2375-2548
Versió de l'editorhttp://advances.sciencemag.org/content/3/5/e1602617/tab-pdf
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
J17-086.pdf | 1,404Mb | Visualitza/Obre |