Graphene-Silicon Schottky Diodes for Photodetection
We present the optoelectronic characterization of graphene/silicon Schottky junctions, fabricated by transferring CVD-graphene on flat and nanotip-patterned n- and p-type Si substrates. We show that medium n-type doping results in the highest rectification. We demonstrate high photoresponsivity, exc...
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| Published in | IEEE transactions on nanotechnology Vol. 17; no. 6; pp. 1133 - 1137 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
New York
IEEE
01.11.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1536-125X 1941-0085 |
| DOI | 10.1109/TNANO.2018.2853798 |
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| Abstract | We present the optoelectronic characterization of graphene/silicon Schottky junctions, fabricated by transferring CVD-graphene on flat and nanotip-patterned n- and p-type Si substrates. We show that medium n-type doping results in the highest rectification. We demonstrate high photoresponsivity, exceeding 2.5 A/W under white light, which we attribute to the contribution of charges photogenerated in the surrounding region of the flat junction or to the internal gain by impact ionization caused by the enhanced field on the nanotips. |
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| AbstractList | We present the optoelectronic characterization of graphene/silicon Schottky junctions, fabricated by transferring CVD-graphene on flat and nanotip-patterned n- and p-type Si substrates. We show that medium n-type doping results in the highest rectification. We demonstrate high photoresponsivity, exceeding 2.5 A/W under white light, which we attribute to the contribution of charges photogenerated in the surrounding region of the flat junction or to the internal gain by impact ionization caused by the enhanced field on the nanotips. |
| Author | Giubileo, Filippo Urban, Francesca Luongo, Giuseppe Di Bartolomeo, Antonio Iemmo, Laura |
| Author_xml | – sequence: 1 givenname: Antonio surname: Di Bartolomeo fullname: Di Bartolomeo, Antonio email: adibartolomeo@unisa.it organization: Phys. Dept., Univ. of Salerno, Fisciano, Italy – sequence: 2 givenname: Giuseppe surname: Luongo fullname: Luongo, Giuseppe email: giluongo@unisa.it organization: Phys. Dept., Univ. of Salerno, Fisciano, Italy – sequence: 3 givenname: Laura surname: Iemmo fullname: Iemmo, Laura email: liemmo@unisa.it organization: Phys. Dept., Univ. of Salerno, Fisciano, Italy – sequence: 4 givenname: Francesca surname: Urban fullname: Urban, Francesca email: furban@unisa.it organization: Phys. Dept., Univ. of Salerno, Fisciano, Italy – sequence: 5 givenname: Filippo surname: Giubileo fullname: Giubileo, Filippo email: filippo.giubileo@spin.cnr.it organization: SPIN, Fisciano, Italy |
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| SubjectTerms | Carbon compounds Graphene Heterojunctions Ionization Nanoscale devices Optoelectronics Photodetectors Schottky barriers Schottky diodes Silicon substrates White light |
| Title | Graphene-Silicon Schottky Diodes for Photodetection |
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