Electroluminescence observation and x-ray topographic study of a nitrogen-doped GaP-LED

Abstract
The lattice defects in nitrogen‐doped GaP light‐emitting diodes (LED’s) are investigated by taking an electroluminescence (EL) pattern and an x‐ray topograph of a small LED chip. The one‐to‐one correspondence between the dark lines in the EL pattern and the screw dislocations is obtained.