“The best time to plant a tree was 20 years ago. The second best time is now.” Origin uncertain, usually attributed as a Chinese Proverb.
Monday, 12 December 2016
New multi-junction solar cell record
A conversion efficiency of 30.2 percent for a
III-V / Si multi-junction solar cell has been measured at the Fraunhofer
Institute for Solar Energy Systems.
The 4 cm² device was made of GaInP, GaAs and Si stacks.