scholarly journals Significant Carrier Extraction Enhancement at the Interface of an InN/p-GaN Heterojunction under Reverse Bias Voltage

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1039 ◽  
Author(s):  
Vladimir Svrcek ◽  
Marek Kolenda ◽  
Arunas Kadys ◽  
Ignas Reklaitis ◽  
Darius Dobrovolskas ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Electron Concentration ◽  
Reverse Bias ◽  
Depletion Region ◽  
Reverse Bias Voltage ◽  
High Quality ◽  
Electrical Field ◽  
Carrier Multiplication ◽  
Carrier Extraction ◽  
Blue Spectral Region

In this paper, a superior-quality InN/p-GaN interface grown using pulsed metalorganic vapor-phase epitaxy (MOVPE) is demonstrated. The InN/p-GaN heterojunction interface based on high-quality InN (electron concentration 5.19 × 1018 cm−3 and mobility 980 cm2/(V s)) showed good rectifying behavior. The heterojunction depletion region width was estimated to be 22.8 nm and showed the ability for charge carrier extraction without external electrical field (unbiased). Under reverse bias, the external quantum efficiency (EQE) in the blue spectral region (300–550 nm) can be enhanced significantly and exceeds unity. Avalanche and carrier multiplication phenomena were used to interpret the exclusive photoelectric features of the InN/p-GaN heterojunction behavior.

scholarly journals Квантовый выход кремниевого лавинного фотодиода в диапазоне длин волн 120-170 nm

2020 ◽  
Vol 90 (8) ◽  
pp. 1386
Author(s):  
П.Н. Аруев ◽  
В.П. Белик ◽  
В.В. Забродский ◽  
Е.М. Круглов ◽  
А.В. Николаев ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Wavelength Range ◽  
Bias Voltage ◽  
Reverse Bias ◽  
Avalanche Photodiode ◽  
Reverse Bias Voltage ◽  
External Quantum Yield

The external quantum yield of silicon avalanche photodiode in the wavelength range of 120-170 nm was performed. It was shown that the engineered avalanche photodiode has the external quantum yield of 24-150 electron/proton under reverse bias voltage of 230-345 V, respectively. The testing of worked out avalanche photodiode by means of pulse flash of 280 and 340 nm wavelength demonstrates the speed, corresponding to the bandwidth not less than 25 MHz.

scholarly journals Surface dipole assisted charge carrier extraction in inverted architecture perovskite solar cells

2021 ◽  
Vol 119 (23) ◽  
pp. 233903
Author(s):  
Man Ho Wong ◽  
Qingzhi An ◽  
Joshua Kress ◽  
Jean-Marc Mörsdorf ◽  
Joachim Ballmann ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Perovskite Solar Cells ◽  
Surface Dipole ◽  
Carrier Extraction

Optical detected magnetic resonance of nitrogen-vacancy centers in vertical diamond Schottky diode

2021 ◽  
Author(s):  
Muhammad Hafiz bin Abu Bakar ◽  
Aboulaye Traore ◽  
Junjie Guo ◽  
Toshiharu MAKINO ◽  
Masahiko Ogura ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Bias Voltage ◽  
Schottky Diode ◽  
Stark Effect ◽  
Reverse Bias ◽  
Nitrogen Vacancy ◽  
Reverse Bias Voltage ◽  
Zero Phonon Line ◽  
Optically Detected ◽  
Nv Centers

Abstract Diamond solid-state devices are very attractive to electrically control the charge state of Nitrogen-Vacancy (NV) centers. In this work, Vertical p-type Diamond Schottky Diode (VDSDs) is introduced as a platform to electrically control the interconversion between the neutral charge NV (NV0) and negatively charged NV (NV-) centers. The photoluminescence (PL) of NV centers generated by ion-implantation in VDSDs shows the increase of NV- Zero Phonon Line (ZPL) and phonon sideband (PBS) intensities with the reverse voltage, whereas the NV0 ZPL intensity decreases. Thus, NV centers embedded into VDSDs are converted into NV- under reverse bias voltage. Moreover, the optically detected magnetic resonance (ODMR) of NV- exhibits an increase in the ODMR contrast with the reverse bias voltage and splitting of the resonance dips. Since no magnetic is applied, such a dip splitting in ODMR spectrum is ascribed the Stark effect induced by the interaction of NV- with the electric field existing within the depletion region of VDSDs.

Highly Efficient Aqueous‐Processed Hybrid Solar Cells: Control Depletion Region and Improve Carrier Extraction

2019 ◽  
Vol 9 (24) ◽  
pp. 1803849 ◽  
Author(s):  
Nan‐Nan Chen ◽  
Gan Jin ◽  
Li‐Jing Wang ◽  
He‐Nan Sun ◽  
Qing‐Sen Zeng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Depletion Region ◽  
Hybrid Solar Cells ◽  
Highly Efficient ◽  
Carrier Extraction

scholarly journals Moisture-Induced Crystallographic Reorientations and Effects on Charge Carrier Extraction in Metal Halide Perovskite Solar Cells

2020 ◽  
Vol 5 (11) ◽  
pp. 3526-3534
Author(s):  
Juanita Hidalgo ◽  
Carlo A. R. Perini ◽  
Andrés-Felipe Castro-Mendez ◽  
Dennis Jones ◽  
Hans Köbler ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Perovskite Solar Cells ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Carrier Extraction

Photoresponse Linearity of a-Si:H Imaging Pixels

1993 ◽  
Vol 297 ◽  
Author(s):  
J. Yorkston ◽  
L.E. Antonuk ◽  
W. Huang ◽  
R.A. Street
Keyword(s):  
Amorphous Silicon ◽  
Bias Voltage ◽  
Linear Response ◽  
Reverse Bias ◽  
Reverse Bias Voltage ◽  
Imaging Arrays ◽  
Low Contrast ◽  
X Ray

Amorphous silicon imaging arrays with ∼3×105 pixels have recently been developed and x-ray images of low contrast anatomical phantoms have been demonstrated. This paper reports on the linearity of response of these a-Si:H imaging pixels as a function of reverse bias voltage. The fraction of the imaging pixel's full signal range that maintains a linear response has been found to increase with increasing voltage.

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