Výsledky vyhledávání

Akademický článek

Performance enhancement of graphene/Ge near-infrared photodetector by modulating the doping level of graphene

Autor: Min Gyu Kwon, Cihyun Kim, Kyoung Eun Chang, Tae Jin Yoo, So-Young Kim, Hyeon Jun Hwang, Sanghan Lee, Byoung Hun Lee

Publikováno v: APL Photonics, Vol 7, Iss 2, Pp 026101-026101-7 (2022)

In this paper, we improved the performance of a near-infrared graphene/germanium heterojunction photodetector at atmospheric pressure and at room temperature. We applied graphene with p-type chemical doping (doping chemical: polyacrylic acid) to lowe

Externí odkaz: https://doaj.org/article/68a9562f2bb249b484ad19fba17abf3a

Zobrazit plný text záznamu

Akademický článek

Tunable AC/DC converter using graphene-germanium barristor based half-wave rectifier

Autor: Sunwoo Heo, Min Gyu Kwon, Ho-In Lee, Cihyun Kim, Seung Mo Kim, Kyoung Eun Chang, Yongsu Lee, Byoung Hun Lee

Publikováno v: AIP Advances, Vol 9, Iss 9, Pp 095009-095009-5 (2019)

Tunable DC voltage control circuit based on a half-wave rectifier was developed using a graphene–germanium barristor. The output DC voltage level could be modulated at 30–100% of the peak voltage by controlling the Schottky barrier height between

Externí odkaz: https://doaj.org/article/64af046b165841e5bfa007adda0bf31c

Zobrazit plný text záznamu

Akademický článek

High Gain and Broadband Absorption Graphene Photodetector Decorated with Bi2Te3 Nanowires

Autor: Tae Jin Yoo, Wan Sik Kim, Kyoung Eun Chang, Cihyun Kim, Min Gyu Kwon, Ji Young Jo, Byoung Hun Lee

Publikováno v: Nanomaterials, Vol 11, Iss 3, p 755 (2021)

A graphene photodetector decorated with Bi2Te3 nanowires (NWs) with a high gain of up to 3 × 104 and wide bandwidth window (400–2200 nm) has been demonstrated. The photoconductive gain was improved by two orders of magnitude compared to the gain o

Externí odkaz: https://doaj.org/article/82310ba3892841478fa8ca873284bad8

Zobrazit plný text záznamu

High-performance near-infrared photodetectors based on gate-controlled graphene–germanium Schottky junction with split active junction

Autor: Cihyun Kim, Tae Jin Yoo, Min Gyu Kwon, Kyoung Eun Chang, Hyeon Jun Hwang, Byoung Hun Lee

Publikováno v: Nanophotonics. 11:1041-1049

The structure of a gate-controlled graphene/germanium hybrid photodetector was optimized by splitting the active region to achieve highly sensitive infrared detection capability. The strengthened internal electric field in the split active junctions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45837284f2e6dcca7c6e0e0e42a9d8c5
https://doi.org/10.1515/nanoph-2021-0738

Zobrazit plný text záznamu

Highly responsive near-infrared photodetector with low dark current using graphene/germanium Schottky junction with Al2O3 interfacial layer

Autor: Hyeon Jun Hwang, Tae Jin Yoo, Byoung Hun Lee, Kyoung Eun Chang, Cihyun Kim, Min Gyu Kwon

Publikováno v: Nanophotonics, Vol 10, Iss 5, Pp 1573-1579 (2021)

The performance of a graphene/Ge Schottky junction near-infrared photodetector is significantly enhanced by inserting a thin Al2O3 interfacial layer between graphene and Ge. Dark current is reduced by two orders of magnitudes, and the specific detect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77133be2f549fb6226cb668858f013b3
https://doaj.org/article/2816a5a6d7d6456ca1b0c2f196e554ed

Zobrazit plný text záznamu