Semiconductors & ICs

Thermally Resilient, Broadband Optical Absorber From UV to IR Derived From Carbon Nanostructures

This technology can be used in aerospace, semiconductors, antireflection coatings, optoelectronics, and communications. Optical absorber coatings have been developed from carbon-based paints, metal blacks, or glassy carbon. However, such materials are not truly black and have poor absorption characteristics at longer wavelengths. The blackness of such coatings is important to increase the accuracy of calibration targets used in radiometric imaging spectrometers since blackbody cavities are prohibitively large in size. Such coatings are also useful potentially for thermal detectors, where a broadband absorber is desired. Au-black has been a commonly used broadband optical absorber, but it is very fragile and can easily be damaged by heat and mechanical vibration. An optically efficient, thermally rugged absorber could also be beneficial for thermal solar cell applications for energy harnessing, particularly in the 350–2,500 nm spectral window.

Posted in: Materials, Semiconductors & ICs, Briefs

Read More >>

Magnetic Testing Technique Helps Ensure Reliability of PV Cells

Making use of the force generated by magnetic repulsion, Georgia Tech researchers have developed a new technique for measuring the adhesion strength between thin films of materials used in microelectronic devices, photovoltaic cells, and microelectromechanical systems (MEMS).

Posted in: Solar Power, Renewable Energy, Test & Measurement, Semiconductors & ICs, MEMs, News

Read More >>

A Bio-Solar Breakthrough

An international team of researchers has developed a process that improves the efficiency of generating electric power using molecular structures extracted from plants. The system taps into photosynthetic processes to produce efficient and inexpensive energy.

Posted in: Materials, Coatings & Adhesives, Solar Power, Energy Efficiency, Renewable Energy, Semiconductors & ICs, News

Read More >>

Metal-Assisted Chemical Etching

University of Illinois researchers have developed a method to chemically etch patterned arrays in the semiconductor gallium arsenide - used in solar cells, lasers, light-emitting diodes (LEDs), field effect transistors (FETs), capacitors, and sensors.

Posted in: Metals, Solar Power, Renewable Energy, LEDs, Semiconductors & ICs, News

Read More >>

Composite Metamaterial for Solar Tech

A Northwestern University research team has developed a new material that absorbs a wide range of wavelengths and could lead to more efficient and less expensive solar technology. The researchers used two unconventional materials – metal and silicon oxide – to create thin but complex, trapezoid-shaped metal gratings on the nanoscale that can trap a wider range of visible light.

Posted in: Materials, Metals, Solar Power, Energy Efficiency, Renewable Energy, Energy, Semiconductors & ICs, News, GDM

Read More >>

MOSFET Switching Circuit Protects Shape Memory Alloy Actuators

A small-footprint, full surface-mount-component printed circuit board employs MOSFET (metal-oxide-semi-conductor field-effect transistor) power switches to switch high currents from any input power supply from 3 to 30 V.

Posted in: Semiconductors & ICs, Briefs

Read More >>

Optimized FPGA Implementation of Multi-Rate FIR Filters Through Thread Decomposition

This technique is used in design automation and in digital circuit design.Multi-rate finite impulse response (MRFIR) filters are among the essential signal-processing components in space-borne instruments where finite impulse response filters are often used to minimize nonlinear group delay and finite-precision effects. Cascaded (multi-stage) designs of MRFIR filters are further used for large rate change ratio in order to lower the required throughput, while simultaneously achieving comparable or better performance than single-stage designs. Traditional representation and implementation of MRFIR employ polyphase decomposition of the original filter structure, whose main purpose is to compute only the needed output at the lowest possible sampling rate.

Posted in: Semiconductors & ICs, Briefs

Read More >>