## Measurement setup

• General
• t = -20șC*

• IV
• from 0 to -1000V to BACK, PAD and INNERMOST GR at GND

• CV
• same setup as IV plus:
• dV = 0.5 V
• nu = 1000 Hz

## Nota Bene

• In CV measurements the GR is really at GND while the PAD is at R x I_leak, where R = 40 kOhm

## Analysis guide

1. No depletion up to 1000V for flunce larger than 1e15
2. Two different slopes in CV plots for fluence greater than 1e15; other levels
3. Corrections_for_Vdep_based_on_logC_logV.txt: Corrections for the depletion voltage due to temperature and frequence

## Data

• IV
• The first column is bias, the second is total current, the third is PAD current
• CV
• The first column is the real voltage difference between BACK and PAD; 4th column is the bias set on the Keithley; 2nd column is capacitance; 3rd Conductivity; last column is total current

## Results

### IV

• All IV curves in one plot:

• IV curves for fluence = 1e15:

• IV curves for fluence = 5e15:

• IV curves for fluence = 1e16:

### CV

• C^-2 VS V for fl=1e15:

• C^-2 VS V for fl=5e15:

• C^-2 VS V for fl=1e16:

d=300 um = 0.3 cm

 phi = 0 neq/cm2

W# Neff (cm^-3)
W6 5.7e11
W9 5.5e11

Vdep = 38 V

 phi = 10e15 neq/cm2

W# Neff (cm^-3)
W6 3.3e12
W9 3.3e12

Neff(phi) = Neff(0)-b*phi

b=(Neff(phi)-Neff(0))/phi = 3e-3 cm^-1

Vdep = 230 V

* alpha = (6.9 +/- 1.5) 1e-17 A/cm*

 phi = 5x10e15 neq/cm2

W# Neff (cm^-3)
W14 1.5e13
W8 1.5e13

Neff(phi) = Neff(0)-b*phi

b=(Neff(phi)-Neff(0))/phi = 3e-3 cm^-1

Vdep = 1034 V

 phi = 1x10e16 neq/cm2

W# Neff (cm^-3)
W1 4.4e13
W13 4.4e13

Neff(phi) = Neff(0)-b*phi

b=(Neff(phi)-Neff(0))/phi = 4e-3 cm^-1

Vdep = 3034 V

-- MarcoBomben - 11-Oct-2011

Topic attachments
I Attachment History Action Size Date Who Comment
png irrad2011.png r1 manage 34.9 K 2011-10-14 - 12:01 MarcoBomben All IV curves in one plot
png irrad2011-fl5e15.png r1 manage 23.6 K 2011-10-14 - 12:08 MarcoBomben IV curves for fluence = 5e15
png irrad2011-fl5e15-best.png r1 manage 17.7 K 2011-10-15 - 12:21 MarcoBomben C^-2 VS V for fl=5e15
png irrad2011-fl1e16.png r1 manage 18.7 K 2011-10-14 - 12:09 MarcoBomben IV curves for fluence = 1e16
png irrad2011-fl1e16-best.png r1 manage 19.4 K 2011-10-15 - 12:33 MarcoBomben C^-2 VS V for fl=1e16
png irrad2011-fl1e15.png r1 manage 21.0 K 2011-10-14 - 12:07 MarcoBomben IV curves for fluence = 1e15
png irrad2011-fl1e15-best.png r3 r2 r1 manage 18.0 K 2011-10-15 - 11:50 MarcoBomben C^-2 VS V for fl=1e15
txt Corrections_for_Vdep_based_on_logC_logV.txt r1 manage 0.9 K 2012-10-11 - 13:10 MarcoBomben Corrections for the depletion voltage due to temperature and frequence

This topic: Main > TWikiUsers > MarcoBomben > Irrad2011
Topic revision: r9 - 2012-10-11 - MarcoBomben

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