Photovoltaic Detector: HgCdTe (MCT)

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Photovoltaic detectors (photodiodes) are semiconductor structures that have one (PV) or multiple (PVM) homojunction or heterojunctions. Absorbed photons generate charge carriers that accumulate at the contacts, leading to an external photocurrent.

Photodiodes are known to have complex current-voltage properties. Such devices can work either with reverse voltage or at flicker-free zero bias. A reverse bias voltage is often used to boost responsivity and differential resistance, increase the dynamic range, decrease the shot noise and enhance high-frequency performance.

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The PCI-3TE-12-1×1-TO8-wZnSeAR-36 from VIGO System is a three-stage thermoelectrically cooled IR photoconductor based on the advanced HgCdTe heterostructure to ensure optimal performance and stability.

The photoconductor has been improved to deliver optimum performance at 12 µm. The detector element is monolithically incorporated with hyper hemispherical GaAs microlens to enhance the performance of the device.

Photoconductive detectors are expected to work in optimal bias voltage and current readout mode. Thanks to 1/f noise, low-frequency performance is decreased, while the 3° wedged zinc selenide anti-reflection-coated (wZnSeAR) window prevents undesirable interference effects.

Table 1. Source: VIGO System

Image Name Cooling Immersion Optimal wavelength
λopt, µm		 Detectivity D*(λopt),
cm·Hz1/2/W		 Package Time
constant
τ, ns		 Datasheet
PVI-5-1×1-TO39-NW-36 Uncooled Yes 5.0 ≥1.0×1010 TO39 ≤150
PVI-4-1×1-TO39-NW-36 Uncooled Yes 4.0 ≥3.0x1010 TO39 ≤150
PVI-2TE-4-1×1-TO8-wAl2O3-36 Two-stage TE cooled Yes 4.0 ≥3.0x1011 TO8 ≤100
PVI-2TE-5-1×1-TO8-wAl2O3-36 Two-stage TE cooled Yes 5.0 ≥9.0x1010 TO8 ≤80
PVI-2TE-6-1×1-TO8-wZnSeAR-36 Two-stage TE cooled Yes 6.0 ≥4.0×1010 TO8 ≤50
PVI-4TE-6-1×1-TO8-wZnSeAR-36 Four-stage TE cooled Yes 6.0 ≥6.0×1010 TO8 ≤50
PVM-10.6-1×1-TO39-NW-90 Uncooled No 10.6 ≥1.0x107 TO39 ≤1.5
PVM-2TE-10.6-1×1-TO8-wZnSeAR-70 Two-stage TE cooled Yes 10.6 ≥1.0×108 TO8 ≤90
PVMI-2TE-10.6-1×1-TO8-wZnSeAR-36 Two-stage TE cooled Yes 10.6 ≥1.0x109 TO8 ≤3
PVMI-4TE-10.6-1×1-TO8-wZnSeAR-36 Four-stage TE cooled Yes 10.6 ≥2.5x109 TO8 ≤3
PEM-10.6-2×2-PEM-SMA-wZnSeAR-48 Uncooled No 10.6 ≥1.0x107 PEM with SMA connector ≤1.2

 

All HgCdTe (MCT) Photovoltaic Detectors 

Table 2. Source: VIGO System

Image Name Cooling Immersion Optimal wavelength
λopt, µm		 Detectivity D*(λopt),
cm·Hz1/2/W		 Package Time
constant
τ, ns		 Datasheet
PV-3 Uncooled No 3.0 ≥6.5x109 BNC,
TO8,
TO39		 ≤350
PV-3.4 Uncooled No 3.4 ≥5.0x109 BNC,
TO8,
TO39		 ≤260
PV-4 Uncooled No 4.0 ≥3.0x109 BNC,
TO8,
TO39		 ≤150
PV-5 Uncooled No 5.0 ≥1.0x109 BNC,
TO8,
TO39		 ≤120
PV-6 Uncooled No 6.0 ≥5.0x108 BNC,
TO8,
TO39		 ≤80
PV-2TE-3 Two-stage TE cooled No 3.0 ≥7.0x1010 TO8,
TO66		 ≤280
PV-2TE-3.4 Two-stage TE cooled No 3.4 ≥4.0x1010 TO8,
TO66		 ≤200
PV-2TE-4 Two-stage TE cooled No 4.0 ≥3.0x1010 TO8,
TO66		 ≤100
PV-2TE-5 Two-stage TE cooled No 5.0 ≥9.0x109 TO8,
TO66		 ≤80
PV-2TE-6 Two-stage TE cooled No 6.0 ≥2.0x109 TO8,
TO66		 ≤50
PV-2TE-8 Two-stage TE cooled No 8.0 ≥2.0x108 TO8,
TO66		 ≤45
PV-2TE-10.6 Two-stage TE cooled No 10.6 ≥1.0x108 TO8,
TO66		 ≤10
PV-3TE-3 Three-stage TE cooled No 3.0 ≥1.0x1011 TO8,
TO66		 ≤280
PV-3TE-3.4 Three-stage TE cooled No 3.4 ≥7.0x1010 TO8,
TO66		 ≤200
PV-3TE-4 Three-stage TE cooled No 4.0 ≥4.0x1010 TO8,
TO66		 ≤100
PV-3TE-5 Three-stage TE cooled No 5.0 ≥1.0x1010 TO8,
TO66		 ≤80
PV-3TE-6 Three-stage TE cooled No 6.0 ≥4.0x109 TO8,
TO66		 ≤50
PV-3TE-8 Three-stage TE cooled No 8.0 ≥3.0x108 TO8,
TO66		 ≤45
PV-3TE-10.6 Three-stage TE cooled No 10.6 ≥1.5x108 TO8,
TO66		 ≤10
PV-4TE-3 Four-stage TE cooled No 3.0 ≥1.5x1011 TO8,
TO66		 ≤280
PV-4TE-3.4 Four-stage TE cooled No 3.4 ≥1.0x1011 TO8,
TO66		 ≤200
PV-4TE-4 Four-stage TE cooled No 4.0 ≥6.0x1010 TO8,
TO66		 ≤100
PV-4TE-5 Four-stage TE cooled No 5.0 ≥1.5x1010 TO8,
TO66		 ≤80
PV-4TE-6 Four-stage TE cooled No 6.0 ≥5.0x109 TO8,
TO66		 ≤50
PV-4TE-8 Four-stage TE cooled No 8.0 ≥4.0x108 TO8,
TO66		 ≤45
PV-4TE-10.6 Four-stage TE cooled No 10.6 ≥2.0x108 TO8,
TO66		 ≤25
PVI-3 Uncooled Yes 3.0 ≥5.0x1010 TO39,
BNC		 ≤350
PVI-3.4 Uncooled Yes 3.4 ≥4.5x1010 TO39,
BNC		 ≤260
PVI-4 Uncooled Yes 4.0 ≥2.0x1010 TO39,
BNC		 ≤150
PVI-5 Uncooled Yes 5.0 ≥9.0x1010 TO39,
BNC		 ≤120
PVI-6 Uncooled Yes 6.0 ≥4.0x109 TO39,
BNC		 ≤80
PVI-2TE-3 Two-stage TE cooled Yes 3.0 ≥5.5x1011 TO8,
TO66		 ≤280
PVI-2TE-3.4 Two-stage TE cooled Yes 3.4 ≥3.0x1011 TO8,
TO66		 ≤200
PVI-2TE-4 Two-stage TE cooled Yes 4.0 ≥2.0x1011 TO8,
TO66		 ≤100
PVI-2TE-5 Two-stage TE cooled Yes 5.0 ≥6.0x1010 TO8,
TO66		 ≤80
PVI-2TE-6 Two-stage TE cooled Yes 6.0 ≥2.0x1010 TO8,
TO66		 ≤50
PVI-2TE-8 Two-stage TE cooled Yes 8.0 ≥2.0x109 TO8,
TO66		 ≤45
PVI-2TE-10.6 Two-stage TE cooled Yes 10.6 ≥1.0x1010 TO8,
TO66		 ≤10
PVI-3TE-3 Three-stage TE cooled Yes 3.0 ≥7.0x1011 TO8,
TO66		 ≤280
PVI-3TE-3.4 Three-stage TE cooled Yes 3.4 ≥5.0x1011 TO8,
TO66		 ≤200
PVI-3TE-4 Three-stage TE cooled Yes 4.0 ≥3.0x1011 TO8,
TO66		 ≤100
PVI-3TE-5 Three-stage TE cooled Yes 5.0 ≥8.0x1010 TO8,
TO66		 ≤80
PVI-3TE-6 Three-stage TE cooled Yes 6.0 ≥3.0x1010 TO8,
TO66		 ≤50
PVI-3TE-8 Three-stage TE cooled Yes 8.0 ≥3.0x109 TO8,
TO66		 ≤45
PVI-3TE-10.6 Three-stage TE cooled Yes 10.6 ≥1.5x109 TO8,
TO66		 ≤10
PVI-4TE-3 Four-stage TE cooled Yes 3.0 ≥8.0x1011 TO8,
TO66		 ≤280
PVI-4TE-3.4 Four-stage TE cooled Yes 3.4 ≥7.0x1011 TO8,
TO66		 ≤200
PVI-4TE-4 Four-stage TE cooled Yes 4.0 ≥4.0x1011 TO8,
TO66		 ≤100
PVI-4TE-5 Four-stage TE cooled Yes 5.0 ≥1.0x1011 TO8,
TO66		 ≤80
PVI-4TE-6 Four-stage TE cooled Yes 6.0 ≥4.0x1010 TO8,
TO66		 ≤50
PVI-4TE-8 Four-stage TE cooled Yes 8.0 ≥4.0x109 TO8,
TO66		 ≤45
PVI-4TE-10.6 Four-stage TE cooled Yes 10.6 ≥2.0x109 TO8,
TO66		 ≤25
PVM-8 Uncooled No 8.0 ≥6.5x107 TO39,
BNC		 ≤4
PVM-10.6 Uncooled No 10.6 ≥1.0x107 TO39,
BNC		 ≤1.5
PVM-2TE-8 Two-stage TE cooled No 8.0 ≥3.0x108 TO8,
TO66		 ≤4
PVM-2TE-10.6 Two-stage TE cooled No 10.6 ≥1.0x108 TO8,
TO66		 ≤3
PVMI-8 Uncooled Yes 8.0 ≥3.0x108 TO39,
BNC		 ≤4
PVMI-10.6 Uncooled Yes 10.6 ≥1.0x108 BNC,
TO39		 ≤1.5
PVMI-2TE-8 Two-stage TE cooled Yes 8.0 ≥2.0x109 TO8,
TO66		 ≤4
PVMI-2TE-10.6 Two-stage TE cooled Yes 10.6 ≥1.0x109 TO8,
TO66		 ≤3
PVMI-3TE-8 Three-stage TE cooled Yes 8.0 ≥3.0x109 TO8,
TO66		 ≤4
PVMI-3TE-10.6 Three-stage TE cooled Yes 10,6 ≥1.5x109 TO8,
TO66		 ≤3
PVMI-4TE-8 Four-stage TE cooled Yes 8.0 ≥6.0x109 TO8,
TO66		 ≤4
PVMI-4TE-10.6 Four-stage TE cooled Yes 10.6 ≥2.0x109 TO8,
TO66		 ≤3
PEM-10.6 Uncooled No 10.6 ≥1.0x107 PEM-SMA,
PEM-TO8		 ≤1.2
PEMI-10.6 Uncooled Yes 10.6 ≥1.0x108 PEM-SMA,
PEM-TO8		 ≤1.2

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