Electrical Characterization of deep levels in Indium Phosphide

Abstract

Deep levels in Iridium doped IHype In P grown by Metal Organic Chemical Vapour Deposition (MOCVD) H:dmiqllc has been studied lIsing Deep Level I'ransicnl Spectroscopy (DI.TS). The basic working principal or DI.TS is changing the occupancy of deep levels by changing the reverse bias or the 11 junction. When p-n junction is reve rsed biased. depiction region \vicilh increases and junction capacitance decrease. Applying the reverse or the forward bias pulse to the sample. the deep levels afC filled wilh the ca rri ers Hnd bc(';omc empt y iCsufJil.:icnllhcfmal energy is available. The change in capacitance of the junction due 10 emission of the carriers gives risc 10 capacitance transient. No deep leve l is observed in mino ri ty carri er spectra of" tHype InP. The majo ri ty carrier emission spcc tra arc fo und to be Il11H.:h more richer i-e six electron em itting levels in tHype Iridium doped Indium Phosphide. Six electron emi11ing deep levels in iridium doped Indium Phosphide at 500~lsee pulse width arc obtained. PO is overlap of two peaks. aile with activation energy 0.22eV with error :l0.02 and other wit h activation energy 0.0geV with error .1:0.04 . IJI is also overl ap 01" two peaks. one with activation energy O.28eV with error :f.0.03 and o ther with activation energy O.1geV with error ±O.02. P2 is overl ap or two peaks one \",it h activation energy O. 14eV with error j:0.09 and other with ac tivation energy 0.22eV with error ! 0.0 I. The activation energy o f ]1 3 is 0.38eV with error 10.02. ]14 is 0.53 \\ ith error [0.02. 1)5 is O.5lcV with error j.0.004and P6 is 0.52eV with error .LD.OOI. Capture cross sec tion of highest two levels arc also found. The data for P4 shows a sum o r two ex ponentials giving two va lues 01" capture cross section al 2. 19x 10 .22cm 2 and 02 lAl x lO -22cI112.T he data lor P5 shows the sum or three e; .. ponent ials giving three capture cross sections al = 1.97x I 0 -22(;1112 . 02-: 6.64 x 1 0 -22CI11 2 and 03 8.56x 1 0 - 22cm2.