Evidence of donor–acceptor pair recombination from a new emission band in semiconducting diamond

Abstract
Steady state and time resolvedphotoluminescence studies of type IIb boron‐doped synthetic diamond reveal a new broad red emission band that exhibits many of the features of classic donor–acceptor pair recombination. This recombination is thought to be between an as‐yet unidentified neutral donor, possibly nitrogen related, approximately 3.6 eV below the conduction band edge and neutral boron acceptors at 0.37 eV above the valence band edge.