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Graphene/semi-insulating single crystal CdTe Schottky-type heterojunction X- and γ-Ray Radiation Detectors.

Abstract：

:We developed a new concept of X- and γ-ray radiation semiconductor detectors based on a large area graphene/semi-insulating single crystal CdTe Schottky-type heterojunction. These two terminal electronic devices can be easily fabricated by forming a Van der Waals contact between large area chemical vapor deposited graphene and CdTe substrates in air and at room temperature. This approach significantly reduces the fabrication cost and improves the reproducibility and stability of electrical properties. A detailed analysis of their AC and DC electrical properties was carried out in order to determine the width of the space charge region and dominant charge transport mechanisms at reverse bias. The unoptimized graphene/CdTe heterojunction detectors exhibited a promising spectral resolution of 241Am (59 keV) and 137Cs (662 keV) isotope radiation at room temperature.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Brus VV,Maslyanchuk OL,Solovan MM,Maryanchuk PD,Fodchuk I,Gnatyuk VA,Vakhnyak ND,Melnychuk SV,Aoki T

doi

10.1038/s41598-018-37637-w

subject

Has Abstract

pub_date

2019-01-31 00:00:00

pages

1065

issue

1

issn

2045-2322

pii

10.1038/s41598-018-37637-w

journal_volume

9

pub_type

杂志文章

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