news digest ♦ Solar
Kotidis adds, “These devices are now enabling new applications, which were not available to the past generations of QCLs, due to size, ruggedness and performance limitations. I look forward to the adoption of these new devices by our customers and the rapid growth of their applications.”
The Mini-QCL Module is available in spectral ranges greater than 250 cm-1 per module, and multiple modules can be combined by OEMs. The module can be used in a wide variety of real-time gas analysis applications requiring a mid-infrared laser source, including greenhouse gas monitoring, automotive combustion analysis, oil and gas exploration, and air quality monitoring.
The module is also designed to be integrated into a variety of spectroscopic instruments, including products used in the fields of Photoacoustic Spectroscopy (PAS), Cavity Ring-Down Spectroscopy (CRDS), Infrared Microscopy, and Atomic Force Microscopy (AFM).
The New LaserTune Infrared Source has been significantly reduced in size, while leading the industry in contiguous tuning range. The 2 x 4 mm collimated beam can now be programmed to operate in several modes with a manual step, programmable step, and programmable sweep.
The LaserTune offers fast scan capability at 25 cm-1 per msec, and the source can be programmed to emit pulses from 20 to 500 nsec, while maintaining a duty-cycle up to ~30 percent. Computer control of the LaserTune is via Wireless or Ethernet/HDMI with analogue and digital control for monitoring and controlling the laser wavelength.
Block will be demonstrating the products at SPIE’s Photonics West Conference (Booth #5333) and the BiOS Conference (Booth #8507) in San Francisco.
Solar
Chinese partnership to fuel NJIT›s solar research
The New Jersey’s science and technology university will concentrate on CdTe and CIGS technology
Earlier this month, NJIT formalised an agreement with Chinese partners that will advance the university’s research on thin-film solar cells, an alternative energy technology with the potential to make buildings and other
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www.compoundsemiconductor.net March 2014 infrastructure substantially more energy-efficient.
With more than $650,000 from the Shanghai-based China National Building Materials Company (CNBM), one of the largest gypsum, cement, and fibre glass producers in the world, NJIT will renovate its solar cell research laboratory and build prototype equipment that will enable manufacturers to produce thin-film cells more cost effectively.
The university’s CNBM New Energy Materials Research Centre, directed by physics Ken Chin, is focused on thin-film cells based on CIGS and CdTe, which are both potentially lower-cost alternatives to silicon, the industry standard, because they use raw materials more sparingly, take less net energy to produce, and occupy less space on buildings. Compounds such as CdTe and silicon function as the active semiconductor in a solar cell, absorbing sunlight and converting it to electricity.
The CNBM Centre has already developed important insights into the physics of the photoelectric behavior of these materials, which suggests that new manufacturing conditions could produce much higher cell efficiencies.
“Cadmium telluride is a promising photovoltaic material, but to date, with the exception of a single company, it has been difficult to produce and deploy on a manufacturing scale,” says Alan Delahoy, research professor and the Centre’s general manager. “In terms of the market, the hurdle is making it competitive with crystalline silicon modules. But we see no reason why we can’t meet key efficiency targets by solving some basic scientific questions - and that’s what we aim to do.”
With its new funding, the solar team is building a machine, for example, that will permit manufacturers to deposit thin layers of a transparent conductive material such as zinc oxide on a photovoltaic plate without oxidising the surface of the source metal in the process.
“Conventional technology performs reactive sputtering to form metal oxides for thin-film solar cells, transistors, and sensors, but this process is notoriously difficult to control,” Delahoy says, adding, “Process control is a big challenge in thin-film production. We are trying to come up with better manufacturing methods.”
The research team is also building sensitive equipment that will allow manufacturers to better detect defects in semiconductors.
CNBM is eager to speed development of inexpensive power production that can be seamlessly incorporated into a range of building materials.
“If just the rooftops of the world’s commercial buildings were equipped with current generation solar panels,
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