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2025 – Flame monitoring in industrial burners with semiconductor-based UV sensors focusing on hydrogen-flame

5. junio 2025 von sglux

Dr. Tilman Weiss, sglux GmbH, Berlin, Germany
Yuyu Kimura, IR System Co., Ltd., Tokyo, Japan

This article was first published in the Japanese Journal of Industrial Heating 2025, vol. 62, no. 3, Edition May
Flame monitoring in industrial burners with semiconductor-based UV sensors focusing on hydrogen-flame

Zusammenfassung
Using semiconductor based sensors for flame detection, such as presented with this article can be regarded as a fascinating approach not just with regards on costs and safety. Additionally, looking at environmental and sustainability aspects using semiconductor sensors instead of discharge tubes is a useful tool towards durability and longevity. The possibility of working with two different sensor chips for two different kind of irradiadion (UV and IR) in one small size sensor housing opens up a multitude of new and interesting application possibilities.

Publicado en: Veröffentlichungen und Berichte Etiquetado como: flame, flame_detection

2020 – Temperature Coefficient of SiC UV Photodiodes

23. mayo 2025 von sglux

Stefan Langer, sglux GmbH, Berlin, Germany

SiC Temperature Coefficient

Zusammenfassung
This report assigns the temperature coefficient (TC) of sglux SiC-photodiodes in relation to the incident wavelength. It demonstrates that the temperature coefficient is slightly negative for incident wavelengths below 270nm. At appox. 270nm is it almost zero and then strongly rises towards positive values with increasing wavelengths. The report further explains the physical background of this phenomena.

Publicado en: Forschung, Veröffentlichungen und Berichte

2005 – Electrical transport in passivated Pt/TiO2/Ti Schottky diodes

23. mayo 2025 von sglux

Th. Dittrich¹, V. Zinchuk², V. Skryshevsky², I. Urban³, O. Hilt⁴
¹Hahn-Meitner-Institut, Berlin, Germany
²Department of Radiophysics, Taras Shevchenko University, Kyiv, Ukraine
³Bundesanstalt für Materialforschung, Berlin, Germany
⁴sglux GmbH, Berlin, Germany

JOURNAL OF APPLIED PHYSICS 98, 104501 (2005)

Abstract
Pt/TiO2/Ti Schottky diodes were investigated by current-voltage analysis, photoresponse, and transient photocurrent(PC) in a wide temperature range. The compact TiO2 as well as the SiO2 passivation layers were prepared by the sol-gel technique. The Schottky-barrier height (1.2–1.3eV) was equal to the difference of the work functions of Pt and Ti. The temperature dependence of the ideality factor was interpreted in terms of a Gaussian distribution of barrier heights [J. H. Werner and H. H. Güttler, J. Appl. Phys.69, 1522 (1991)]. Space-charge-limited currents under the presence of defects with an exponential distribution were observed. Under zero-potential condition, the PC transients were practically independent of temperature and the electron drift mobility amounted to 2× 10E-4 cm² (Vs)
A screening dipole layer at the Pt/TiO2 junction was formed under low forward and reverse potentials. Defects were generated under electron injection.

Publicado en: Forschung, Veröffentlichungen und Berichte

2019 – Hochtemperatur SiC-Photodioden bis 350°C erhältlich

23. mayo 2025 von sglux

Dr. Niklas Papathanasiou, sglux GmbH, Berlin, Germany

Tech Report 350°C

Zusammenfassung
Neue Hochtemperatur SiC-Photodioden erhältlich. Die Photodioden können permanent bis zu einer Temperatur von 350°C betrieben werden.
[_/su_spoiler]

Publicado en: Forschung, Veröffentlichungen und Berichte

2020 – Where SiC can replace discontinued GaP?

23. mayo 2025 von sglux

Dr. Tilman Weiss, sglux GmbH, Berlin, Germany

Technical Report «Where SiC can replace discontinued GaP?»

Zusammenfassung
For measurement applications with a peak radiation between 210 nm and 346 nm (e.g. UV sterilization lamp or combustion flame control) a SiC UV photodiode can replace a GaP photodiode without restrictions – it will even output a higher photocurrent. A SiC device irradiated with a peak radiation from 346 to 380 nm will output a lower photocurrent compared with GaP (at same active area). However, if the radiation intensity is high, e.g. curing applications at 365 nm the SiC’s current output will remain at a usable level.

Publicado en: Forschung, Veröffentlichungen und Berichte

2014 – Spectral irradiance measurement and actinic radiometer calibration for UV water disinfection

23. mayo 2025 von sglux

P. Sperfeld¹, B. Barton¹, S. Pape¹, A. Towara¹, J. Eggers², G. Hopfenmueller³,
¹Physikalisch-Technische Bundesanstalt Braunschweig und Berlin (PTB), Germany, ²DVGW-Technologiezentrum Wasser, Karlsruhe, Germany, ³sglux GmbH, Berlin, Germany

Metrologia, 51 (2014), S. 282-288.

Abstract
In a joint project, sglux and PTB investigated and developed methods and equipment to measure the spectral and weighted irradiance of high-efficiency UV-C emitters used in water disinfection plants. A calibration facility was set up to calibrate the microbicidal irradiance responsivity of actinic radiometers with respect to the weighted spectral irradiance of specially selected low-pressure mercury and medium-pressure mercury UV lamps. To verify the calibration method and to perform on-site tests, spectral measurements were carried out directly at water disinfection plants in operation. The weighted microbicidal irradiance of the plants was calculated and compared to the measurements of various actinic radiometers.

Publicado en: Forschung, Veröffentlichungen und Berichte

2009 – Electronic and photoelectrical properties of semiconducting titanium dioxide layers

23. mayo 2025 von sglux

C. Nitschke
Beuth Hochschule für Technik, Master Thesis, 2009

Master thesis 2009

Abstract
In the present thesis electronic and photoelectrical properties of semiconducting titanium dioxide layers were measured using different measuring methods. The titanium dioxide layers had been produced using the sol-gel-process with different precursor solutions. The findings and insights gained shall be used to manipulate the structure and functionality of UV-photodiodes with titanium-dioxide-layers. Traps had been proven both by the analysis of the spectral resolution of the photocurrent and thermally stimulated luminescence. These traps are affected by the titanium dioxide-layer manufacturing process. Using the impedance spectroscopy, the UV-photodiodes inner structure, the width of the space charge layer and the electrical conduction of the titanium dioxide-layer grains and grain boundaries could be measured. Between the impedance of the UV-photodiodes and the speed of reaction a correlation could be noticed. Additionally voltage dependent current and capacity measurements had been carried out as well as thermally stimulated currents had been measured.

Publicado en: Forschung, Veröffentlichungen und Berichte

2008-2009 – Electronic and photoelectrical properties of semiconducting titanium dioxide layers

23. mayo 2025 von sglux

Partner: Technische Hochschule Wildau, sglux GmbH
Zeitraum: 2008-2009
Förderkennzeichen: BMBF 13N9586

Abstract
Electronic and photoelectrical properties of semiconducting titanium dioxide layers had been investigated and improved.

Veröffentlichung
C. Nitschke
«Electronic and photoelectrical properties of semiconducting titanium dioxide layers»
Beuth Hochschule für Technik, Master Thesis, 2009

Publicado en: abgeschlossene Arbeiten, Forschung

2008-2010 – Development of a SiC photodiode wafer production process

23. mayo 2025 von sglux

Partner: Leibniz Ferdinand Braun Institut für Höchstfrequenztechnik (FBH), Leibniz Institut für Kristallzüchtung (IKZ), sglux GmbH
Zeitraum: 2008- 2010
Förderkennzeichen: BMWi ZIM 2194601DB9

Abstract
Highly efficient polytype 4H silicon carbide (4H-SiC) p–n diodes for ultraviolet (UV) light detection have been fabricated, characterized, and exposed to high-intensity mercury lamp irradiation (up to 17 mW/cm²). The behavior of the photocurrent response under UV light irradiation using a low-pressure mercury UV-C lamp (4 mW/cm²) and a medium-pressure mercury discharge lamp (17 mW/cm²) has been studied. Long-term UV photoaging tests had been performed for up to 22 months. Results demonstrate the robustness of SiC photodiodes against UV radiation. The devices under test showed an initial burn-in effect, i.e., the photocurrent response dropped by less than 5% within the first 40 h of artificial UV aging. Such burn-in effect under UV stress was also observed for previously available polytype 6H silicon carbide (6H–SiC) p–n photodetectors. After burn-in, no measurable degradation has been detected, which makes the devices excellent candidates for high irradiance UV detector applications.

Veröffentlichung
D. Prasai¹, W. John¹, L. Weixelbaum¹, O. Krueger¹, G. Wagner², P. Sperfeld³, S. Nowy³, D. Friedrich³, S. Winter³ and T. Weiss⁴,
¹Ferdinand-Braun-Institut, Leibniz-Institut fuer Hoechstfrequenztechnik, Berlin, Germany, ²Leibniz-Institut fuer Kristallzuechtung, Berlin, Germany, ³Physikalisch-Technische Bundesanstalt Braunschweig und Berlin (PTB), 4.1 Photometry and Applied Radiometry, Braunschweig, Germany, ⁴sglux GmbH, Berlin, Germany

«Highly reliable Silicon Carbide photodiodes for visible-blind ultraviolet detector applications»
J. Mater. Res., first view (2012).

Publicado en: abgeschlossene Arbeiten, Forschung

2018 – Ein neues Werkzeug zur Gefährdungsbeurteilung von UV-Strahlung

23. mayo 2025 von sglux

Stefan Langer¹, Dr. Niklas Papathanasiou¹, Johanna Luise Krüger², Gabriel Hopfenmüller¹, Dr. Tilman Weiss¹
¹sglux GmbH, Berlin, Germany, ²Technische Universität Bergakademie Freiberg, Germany

50. Jahrestagung des Fachverbandes Strahlenschutz 2018, Dresden
Artikel anzeigen (noch nicht veröffentlicht)
Poster anzeigen

Zusammenfassung
Die industrielle Nutzung ultravioletter Strahlung erfordert neben der Beurteilung der Prozesswirksamkeit auch deren Bewertung hinsichtlich der Gefährdung des Bedien- und Wartungspersonals. Zu diesem Zweck sind Regelwerke entstanden, die die Durchführung der Strahlungsmessung und deren Bewertung hinsichtlich gesundheitlicher Gefahren beschreiben. Für diese Gefährdungsbeurteilung sind verschiedene Messgeräte am Markt erhältlich. Sie bestimmen die entsprechend der Norm gewichtete momentane Bestrahlungsstärke. Die Ermittlung der zulässigen maximalen täglichen Aufenthaltsdauer muss allerdings in nachfolgenden Rechenschritten erfolgen.
Ein neuartiger, mit diesem Konferenzbeitrag vorgestellter Ansatz basiert auf einem Sensor mit einer an die jeweilige Norm angepassten Empfindlichkeitscharakteristik, welcher mit einem Smartphone verbunden ist. Dort wird neben der Bestrahlungsstärke auch die zulässige Aufenthaltsdauer numerisch, graphisch und akustisch angezeigt. Weil für verschiedene Normen bzw. Strahlungsquellen spezifische Sensoren verwendet werden müssen, stellt das System sicher, dass der momentan angeschlossene Sensor zur Beurteilung der Strahlung nach der gewählten Norm geeignet ist. Dadurch werden der Aufwand und die Fehleranfälligkeit bei einer Gefahrenbewertung deutlich verringert und die Verwendung im Alltagsbetrieb gefördert.

Publicado en: Forschung, Veröffentlichungen und Berichte

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