Impact of open-core threading dislocations on the performance of AlGaN metal-semiconductor-metal photodetectors


The alloy AlxGa1-xN used as absorber material in photodetectors (PDs) offers a high sensitivity in the ultraviolet (UV) spectral range with cut-off wavelength between 200 nm (AlN) and 365 nm (GaN), adjustable by the Al content. UV PDs are of interest for applications in various fields like science, medicine, and industry. Our partner Ferdinand-Braun-Institut now discovered that open-core threading dislocations can enhance sensitivity in AlGaN metal-semiconductor-metal photodetectors and allow for lower operation voltage.

Find further information in the »Research News of Ferdinand-Braun-Institut.

“UV Power” research project is working on LED-replacements for conventional UV light sources


The project, which is being coordinated by Osram Opto Semiconductors, aims to develop new technology for high-power mass-market UV LEDs.

Further information in the »OSRAM Press Release.

Packaging of UV LED chips to meet application demands


UV LEDs are highly attractive for various applications. They can be used, for example, for water purification, medical diagnostics, curing of adhesives and plant growth lighting. Besides improving the optical power and efficiency of the chip itself, packaging of UV LED chips is just as important. This is especially true with respect to thermal conductivity, hermeticity, low production costs, and industrial-suited processes. In this context the use of a cavity package for UV LED chips has been established at FBH in addition to the standard planar submount.

Find further information in the »Research News of Ferdinand-Braun-Institut.

New ultra violet light emitting system provides 300mW UV-C (265nm) radiation


The LED system OLM-034C expands the OSA Opto Light product portfolio in the UVC and UVB region. Up to 30 LED at 265 or 280 nm, up to 36 LED at 300 nm are arranged in a high reliable, air cooled, turnkey ready LED system. The included power supply can be operated independent or PC-switched. The irradiance is about 50 mW/cm² @ 265 nm and the unit is e.g. a powerful laboratory tool for biological, medical and chemical experiments. Due to the still very high costs for UVB and UVC LED the number of LED on one radiation source and be varied between 9 and 30 pcs, in case of 300 nm between 9 and 36 pcs to match the costs.

Winners of Ideas Competition for UV Light-emitting Diodes


The winners of the public ideas competition for UV light-emitting diodes in the household and garden have been named. The competition was launched by the Chair of Innovation Management at Freie Universität. Under the title "LEDs innovate your home," the organizers were looking for ideas for using UV-LEDs in private households.

Find further information in the »Press Release of FU Berlin .

Degradation of AlGaN-based metal-semiconductor-metal UV photodetectors


AlxGa1-xN-based metal-semiconductor-metal photodetectors (MSM PDs) are very attractive for the detection of ultraviolet (UV) radiation in a variety of medical, scientific, industrial, and military applications. Although high external quantum efficiencies can be achieved when the PD is illuminated from the substrate side [1-2], to our knowledge no data on the long-term operation of AlGaN-based MSM PD is published, yet.
Our partner Ferdinand-Braun-Institut investigated the degradation behavior of bottom-illuminated Al0.5Ga0.5N/AlN MSM PDs grown by metal-organic vapor phase epitaxy (MOVPE) on double-side polished c-sapphire substrates.

Find further information in the »Research News of Ferdinand-Braun-Institut.

Extremely versatile – FBH offers tailored diode lasers, from the chip to the system


At "Laser World of Photonics" trade show and accompanying "CLEO Europe" conference, the FBH presents its capability in diode lasers and UV LEDs, each device optimized to fit the respective application. At the booth, FBH showcases, among others, a demonstrator module equipped with UVC LEDs for water disinfection purposes. The LEDs utilized have been developed within the “Advanced UV for Life” consortium that is managed by the FBH and also exhibits at the stand.

Find further information »here.

Flexible and efficient assembling of UV LEDs


A new hybrid micro-assembly center expands the technological basis of of our partner CiS Forschungsinstitut für Mikrosensorik GmbH for the development of advanced solutions for the fully automated assembly of application-specific UV-LED modules in various series quantities and designs, whether as single LED light source or flood lamp. The modular system concept allows the performance of the most important assembly and packaging steps in one device. Special functions for laser soldering, dispensing and jetting of solder pastes, pick & place of fragile components, highly precise and fast alignment of UV-LEDs, as well as innovate joining processes such as thermo-sonic bonding can be realized with this platform.

Find further information in the »Press releases of CiS Forschungsinstitut für Mikrosensorik GmbH .

Miniaturized UV-LED lighting with multiple wavelengths


CiS Research Institute has expanded its opto-electronic skills to be able to develop multispectral UV light sources for fluorescence or absorbance measurements. Manufacturers of measuring devices utilized in bioanalytics and medical technology are now able to build significantly smaller systems and to open up new fields of application. The users of this new technology also benefit from low system costs.

Find further information in the »Press releases of CiS Forschungsinstitut für Mikrosensorik GmbH .

LEDs Innovate Your Home - UV LED Idea Challenge


UV LEDs have the power to make the daily household life significantly more comfortable. But where and how are UV LEDs usable? This is the question Advanced UV for Life needs to be answered. The aim of the idea contest is to find UV LED based innovative solutions for household appliances and house maintenance for every room in the house, the garden, the garage, the basement etc.

The consortium call on creative minds to submit their ideas and to contribute to the development of new tools, applications and technologies that are enabled by UV LEDs.

»Visit the contest...

Optimization of AlGaN UV photodetectors for high quantum efficiency at low voltage


Our partner Ferdinand-Braun-Institut has developed optimized AlGaN UV photodetectors with high EQE values at very low bias voltages under bottom illumination conditions by combining sufficiently thin absorber layers and geometrically asymmetric electrode schemes.

Find further information in the »Research News of Ferdinand-Braun-Institut.

Capacitance-voltage measurements – revealing a promising approach to device optimization of UV LEDs


AlGaN-based UV LEDs are promising devices for a variety of applications such as water purification, gas sensing, and UV curing. Investigations of our partners Ferdinand-Braun-Institut and Technische Universität Berlin open up new possibilities for degradation studies in UV LEDs for subsequent optimization.

Find further information in the »Research News of Ferdinand-Braun-Institut.

New partners for the development of innovative UV LED based production technologies


Advanced UV for Life has acquired two new industrial partners for the development of novel production technologies. Thus, manufacturing of continious material in UV LED based roll-to-roll-processes will be adressed.

The new partner »InnoMat GmbH as an innovative company works in the field of polymers and composites. Within the consortium InnoMat aims at UV LED based manufacturing technologies of core materials for lightweight construction.

»Laufenberg GmbH with its long standing experience in the field of manufacturing silicon coated release papers will be focused on the development of UV-curing release films. Furthermore, the company is intested in UV LED based flexographic printing for medical applications and packaging industry.

In-situ metrology solutions for UV LED growth


In the course of LayTec's cooperation within the consortium"Advanced UV for Life" (supported by BMBF), scientists of Technical University of Berlin and FBH (Berlin, Germany) have developed a high temperature MOCVD process for growinglow-defect-density AlN/sapphire templates for UVLEDs. The new Gen3 generation of in-situ metrology offers pyrometry up to 1500 °C, precise reflectance forAlN/AlGaN analysis, high precision material database and many more advanced features. 

Technology development of AlN bulk crystal growth suitable for industrial adoption


Leibniz Institute for Crystal Growth

Aluminum nitride (AlN) is considered as the preferential substrate material for AlGaN-based UV-optoelectronic devices (LEDs, lasers, sensors), especially for efficient deep-UV devices (210-280 nm). The team 'Aluminum Nitride' of our partner Leibniz Institute for Crystal Growth is concerned with technology development of AlN bulk crystal growth suitable for industrial adoption. AlN single crystals are employed as substrates for deep-UV optoelectronics.

Further information on the updated »research page of Leibniz Institute for Crystal Growth.