High-speed photoconductivity and infrared to visible up-conversion in GaP light-emitting diodes

Abstract
In GaP:N (Zn,Te) light-emitting diodes extrinsic photoconductivity and infrared to visible up-conversion have been investigated by short laser pulses at 10-μm wavelength. A time constant of the order of 1 ns was observed indicating that free infrared excited hole to bound donor recombination yields the fast response.