CVD diamond film detectors for α particles with a new electrode structure of reduced graphene oxide/Au

Zilong Zhang, Jian Huang, Yifan Xi, Xinyu Zhou, Ke Tang, Yiben Xia, Yicheng Lu, Linjun Wang

Research output: Contribution to journalArticle

Abstract

(111)-oriented poly-crystalline diamond films (PCDs) have been deposited on Si substrates by MPCVD technology. The new electrode structure of reduced graphene oxide (RGO)/Au was successfully fabricated onto PCDs. Using the circular transmission line model (CTLM), the contact resistance of 6.6 Ω cm−2 was obtained for RGO/Au electrode on PCD surface, which was notably lower than that of 97.4 Ω cm−2 for Ti/Pt/Au electrode. Furthermore, two detectors with these two type electrodes were made respectively. The dark current, photocurrent and energy resolution of these two detectors under 5.5 MeV α particles irradiation from a 241Am source were observed. The results demonstrated that the fabrication of RGO/Au electrode onto PCD can realize a fine ohmic contact. The photocurrent of 58.7 nA for the detector with RGO/Au electrode had higher values than that of 8.8 nA for the detector with Ti/Pt/Au electrode at the bias voltage of 100 V respectively. Due to the realization of good contact on PCD surface with RGO/Au electrode, the energy resolution of 11.9% for the detector with RGO/Au electrode better than that of 24% for the detector with Ti/Pt/Au electrode can be obtained. Fabrication of the RGO/Au electrode on PCD may provide a feasible way to improve its detection performance under α particles irradiation.

Original languageEnglish (US)
Pages (from-to)260-266
Number of pages7
JournalMaterials Science in Semiconductor Processing
Volume91
DOIs
StatePublished - Mar 1 2019
Externally publishedYes

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Diamond films
diamond films
Oxides
Graphene
Chemical vapor deposition
graphene
vapor deposition
Detectors
Electrodes
electrodes
oxides
detectors
Photocurrents
photocurrents
Irradiation
Fabrication
fabrication
irradiation
Ohmic contacts

Cite this

Zhang, Zilong ; Huang, Jian ; Xi, Yifan ; Zhou, Xinyu ; Tang, Ke ; Xia, Yiben ; Lu, Yicheng ; Wang, Linjun. / CVD diamond film detectors for α particles with a new electrode structure of reduced graphene oxide/Au. In: Materials Science in Semiconductor Processing. 2019 ; Vol. 91. pp. 260-266.
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abstract = "(111)-oriented poly-crystalline diamond films (PCDs) have been deposited on Si substrates by MPCVD technology. The new electrode structure of reduced graphene oxide (RGO)/Au was successfully fabricated onto PCDs. Using the circular transmission line model (CTLM), the contact resistance of 6.6 Ω cm−2 was obtained for RGO/Au electrode on PCD surface, which was notably lower than that of 97.4 Ω cm−2 for Ti/Pt/Au electrode. Furthermore, two detectors with these two type electrodes were made respectively. The dark current, photocurrent and energy resolution of these two detectors under 5.5 MeV α particles irradiation from a 241Am source were observed. The results demonstrated that the fabrication of RGO/Au electrode onto PCD can realize a fine ohmic contact. The photocurrent of 58.7 nA for the detector with RGO/Au electrode had higher values than that of 8.8 nA for the detector with Ti/Pt/Au electrode at the bias voltage of 100 V respectively. Due to the realization of good contact on PCD surface with RGO/Au electrode, the energy resolution of 11.9{\%} for the detector with RGO/Au electrode better than that of 24{\%} for the detector with Ti/Pt/Au electrode can be obtained. Fabrication of the RGO/Au electrode on PCD may provide a feasible way to improve its detection performance under α particles irradiation.",
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CVD diamond film detectors for α particles with a new electrode structure of reduced graphene oxide/Au. / Zhang, Zilong; Huang, Jian; Xi, Yifan; Zhou, Xinyu; Tang, Ke; Xia, Yiben; Lu, Yicheng; Wang, Linjun.

In: Materials Science in Semiconductor Processing, Vol. 91, 01.03.2019, p. 260-266.

Research output: Contribution to journalArticle

TY - JOUR

T1 - CVD diamond film detectors for α particles with a new electrode structure of reduced graphene oxide/Au

AU - Zhang, Zilong

AU - Huang, Jian

AU - Xi, Yifan

AU - Zhou, Xinyu

AU - Tang, Ke

AU - Xia, Yiben

AU - Lu, Yicheng

AU - Wang, Linjun

PY - 2019/3/1

Y1 - 2019/3/1

N2 - (111)-oriented poly-crystalline diamond films (PCDs) have been deposited on Si substrates by MPCVD technology. The new electrode structure of reduced graphene oxide (RGO)/Au was successfully fabricated onto PCDs. Using the circular transmission line model (CTLM), the contact resistance of 6.6 Ω cm−2 was obtained for RGO/Au electrode on PCD surface, which was notably lower than that of 97.4 Ω cm−2 for Ti/Pt/Au electrode. Furthermore, two detectors with these two type electrodes were made respectively. The dark current, photocurrent and energy resolution of these two detectors under 5.5 MeV α particles irradiation from a 241Am source were observed. The results demonstrated that the fabrication of RGO/Au electrode onto PCD can realize a fine ohmic contact. The photocurrent of 58.7 nA for the detector with RGO/Au electrode had higher values than that of 8.8 nA for the detector with Ti/Pt/Au electrode at the bias voltage of 100 V respectively. Due to the realization of good contact on PCD surface with RGO/Au electrode, the energy resolution of 11.9% for the detector with RGO/Au electrode better than that of 24% for the detector with Ti/Pt/Au electrode can be obtained. Fabrication of the RGO/Au electrode on PCD may provide a feasible way to improve its detection performance under α particles irradiation.

AB - (111)-oriented poly-crystalline diamond films (PCDs) have been deposited on Si substrates by MPCVD technology. The new electrode structure of reduced graphene oxide (RGO)/Au was successfully fabricated onto PCDs. Using the circular transmission line model (CTLM), the contact resistance of 6.6 Ω cm−2 was obtained for RGO/Au electrode on PCD surface, which was notably lower than that of 97.4 Ω cm−2 for Ti/Pt/Au electrode. Furthermore, two detectors with these two type electrodes were made respectively. The dark current, photocurrent and energy resolution of these two detectors under 5.5 MeV α particles irradiation from a 241Am source were observed. The results demonstrated that the fabrication of RGO/Au electrode onto PCD can realize a fine ohmic contact. The photocurrent of 58.7 nA for the detector with RGO/Au electrode had higher values than that of 8.8 nA for the detector with Ti/Pt/Au electrode at the bias voltage of 100 V respectively. Due to the realization of good contact on PCD surface with RGO/Au electrode, the energy resolution of 11.9% for the detector with RGO/Au electrode better than that of 24% for the detector with Ti/Pt/Au electrode can be obtained. Fabrication of the RGO/Au electrode on PCD may provide a feasible way to improve its detection performance under α particles irradiation.

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