gap grading

gap grading

A particle-size distribution for material such as an aggregate in which particles of certain intermediate sizes are substantially absent.
References in periodicals archive ?
Schock, "A new approach to high-efficiency solar cells by band gap grading in Cu(In, Ga)[Se.sub.2] chalcopyrite semiconductors," Solar Energy Materials and Solar Cells, vol.
Malmstrom et al., "Back surface band gap gradings in Cu(In,Ga)[Se.sub.2] solar cells," Thin Solid Films, vol.