Carsten Dam-Hansen and Technical Univ. of Denmark colleagues Anders Thorseth, Dennis Corell, and Peter Poulsen tested a large number of LED lamps to evaluate quality and lifetime, as reported in their paper "Light quality and efficiency of consumer grade solid state lighting products."
“It is the project group’s hope that we internationally can work together on test and characterization so the data can be shared all over the world to benefit the individual nation importing or producing the products,” Thorseth said.
Cheaper solar power
High-efficiency solar cells are needed to decrease the cost of solar energy, Eglash said. Solar cells that use thin absorber layers cost less and require less of the Earth’s materials. But inefficiencies of conventional light trapping techniques limit the ability to reduce the thickness of thin-film solar cells.
In one of two papers recognized in this area, "The photovoltaic potential of femtosecond-laser textured amorphous silicon,” authors Meng-Ju Sher, Benjamin Franta, Kenneth Hammond, Lysander Christakis, and Eric Mazur of Harvard University told how they used femtosecond laser texturing to reduce reflection and enhance light absorption, enabling high efficiency from thin absorbers.
Clément Colin of th
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