Persistent photocurrents in CVD diamond

C. E. Nebel; A. Waltenspiel; M. Stutzmann; M. Paul; L. Schäfer

doi:10.1016/S0925-9635(99)00204-6

Persistent photocurrents in CVD diamond

C. E. Nebel, A. Waltenspiel, M. Stutzmann, M. Paul, L. Schäfer

TUM Emeriti of Excellence

Research output: Contribution to journal › Conference article › peer-review

48 Scopus citations

Abstract

Persistent photocurrents (PPCs) in undoped polycrystalline CVD diamond are generated by UV illumination with 5.5 eV photons. PPCs are several orders of magnitude larger than dark currents and can be annealed at T>550 K. The PPC annealing dynamic is stretched exponentially with an activation energy of 1.4 eV. Thermally stimulated currents (TSCs) are dominated by maxima around 550 K which are related to a trap level 1.4 eV deep in the energy gap of CVD diamond. UV illumination generates a photocurrent response with an onset at hv≥0.6 eV measured by spectrally resolved photocurrents. A model is discussed which accounts for the detected phenomena where electrons are captured in grain boundaries and holes in defects in the grains of CVD diamond.

Original language	English
Pages (from-to)	404-407
Number of pages	4
Journal	Diamond and Related Materials
Volume	9
Issue number	3
DOIs	https://doi.org/10.1016/S0925-9635(99)00204-6
State	Published - 2000
Event	10th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon Carbide - Prague, Czech Republic Duration: 12 Sep 1999 → 17 Sep 1999

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title = "Persistent photocurrents in CVD diamond",

abstract = "Persistent photocurrents (PPCs) in undoped polycrystalline CVD diamond are generated by UV illumination with 5.5 eV photons. PPCs are several orders of magnitude larger than dark currents and can be annealed at T>550 K. The PPC annealing dynamic is stretched exponentially with an activation energy of 1.4 eV. Thermally stimulated currents (TSCs) are dominated by maxima around 550 K which are related to a trap level 1.4 eV deep in the energy gap of CVD diamond. UV illumination generates a photocurrent response with an onset at hv≥0.6 eV measured by spectrally resolved photocurrents. A model is discussed which accounts for the detected phenomena where electrons are captured in grain boundaries and holes in defects in the grains of CVD diamond.",

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TY - JOUR

T1 - Persistent photocurrents in CVD diamond

AU - Nebel, C. E.

AU - Waltenspiel, A.

AU - Stutzmann, M.

AU - Paul, M.

AU - Schäfer, L.

PY - 2000

Y1 - 2000

N2 - Persistent photocurrents (PPCs) in undoped polycrystalline CVD diamond are generated by UV illumination with 5.5 eV photons. PPCs are several orders of magnitude larger than dark currents and can be annealed at T>550 K. The PPC annealing dynamic is stretched exponentially with an activation energy of 1.4 eV. Thermally stimulated currents (TSCs) are dominated by maxima around 550 K which are related to a trap level 1.4 eV deep in the energy gap of CVD diamond. UV illumination generates a photocurrent response with an onset at hv≥0.6 eV measured by spectrally resolved photocurrents. A model is discussed which accounts for the detected phenomena where electrons are captured in grain boundaries and holes in defects in the grains of CVD diamond.

AB - Persistent photocurrents (PPCs) in undoped polycrystalline CVD diamond are generated by UV illumination with 5.5 eV photons. PPCs are several orders of magnitude larger than dark currents and can be annealed at T>550 K. The PPC annealing dynamic is stretched exponentially with an activation energy of 1.4 eV. Thermally stimulated currents (TSCs) are dominated by maxima around 550 K which are related to a trap level 1.4 eV deep in the energy gap of CVD diamond. UV illumination generates a photocurrent response with an onset at hv≥0.6 eV measured by spectrally resolved photocurrents. A model is discussed which accounts for the detected phenomena where electrons are captured in grain boundaries and holes in defects in the grains of CVD diamond.

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DO - 10.1016/S0925-9635(99)00204-6

M3 - Conference article

AN - SCOPUS:0033729065

SN - 0925-9635

VL - 9

SP - 404

EP - 407

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 3

T2 - 10th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon Carbide

Y2 - 12 September 1999 through 17 September 1999

ER -

Persistent photocurrents in CVD diamond

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