Deep-ultraviolet light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films

Shinya Ohmagari; Tsuyoshi Yoshitake

doi:10.1143/APEX.5.065202

Deep-ultraviolet light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films

Shinya Ohmagari, Tsuyoshi Yoshitake

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Deep-ultraviolet (DUV) light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite (UNCD/a-C:H) films prepared by pulsed laser deposition was investigated. The photocurrent spectra revealed that the UNCD/a-C:H films possess strong responses in the wavelength range between 210 and 280 nm, which might originate from UNCD grains. The heterojunction photodiodes comprised of p-type UNCD/a-C:H and n-type Si exhibited an obvious photovoltaic action for 254nm DUV light illumination. The external quantum efficiency and responsivity of the photodiodes were estimated to be 71% and 130mA/W, respectively. It was proved that UNCD/a-C:H is a new promising material applicable to DUV photodetectors.

Original language	English
Article number	065202
Journal	Applied Physics Express
Volume	5
Issue number	6
DOIs	https://doi.org/10.1143/APEX.5.065202
Publication status	Published - Jun 2012

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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abstract = "Deep-ultraviolet (DUV) light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite (UNCD/a-C:H) films prepared by pulsed laser deposition was investigated. The photocurrent spectra revealed that the UNCD/a-C:H films possess strong responses in the wavelength range between 210 and 280 nm, which might originate from UNCD grains. The heterojunction photodiodes comprised of p-type UNCD/a-C:H and n-type Si exhibited an obvious photovoltaic action for 254nm DUV light illumination. The external quantum efficiency and responsivity of the photodiodes were estimated to be 71% and 130mA/W, respectively. It was proved that UNCD/a-C:H is a new promising material applicable to DUV photodetectors.",

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Deep-ultraviolet light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films

Abstract

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