
Photonis’ Hi-QE photocathode technology provides a unique combination of extremely low dark counts, fast response time, and high quantum efficiency.
- High sensitivity efficiency
- High collection efficiency
- Low noise
- Long life
- Wide variety of formats
Technical information
Photonis offers the Hi-QE photocathode option in four versions: UV, blue, green and red.
QY at 200nm, % | QY at 270nm, % Y | QY at 400nm, % | ||||
---|---|---|---|---|---|---|
Minimum | Typical | Minimum | Typical | Minimum | Typical | |
Hi-QE UV | 22 | 25 | 28 | 32 | 22 | 25 |
Hi-QE UV | 12 | 16 | 27 | 30 | 27 | 30 |
Averaged QY [380-480nm], % | QY at 500nm,% | |||
---|---|---|---|---|
Minimum | Typical | Minimum | Typical | |
Hi-QE Green | 26 | 30 | 18 | 22 |
Averaged QY [520-800nm], %s | ||
---|---|---|
Hi-QE Red | 15 | 17 |
Description
Hi-QE photocathodes are available in a variety of spectral detection ranges to fulfill specific application requirements.
Hi-QE photocathodes lower dark counts as much as 10X, while boosting QE 50% over traditional S20 or S25 photocathode technologies.
Photonis' Hi-QE photocathodes are available in four options, designed to heighten the spectral response across specific wavelengths when compared to broader spectral response photocathodes of S20 and S25. The Hi-QE UV offers superior detection to 330nm, while the Hi-QE blue provides improved response through 400mn. The Hi-QE green option provides unparalleled response from 400-550 nm, while the new Hi-QE Red photocathode is optimized for the 400-900nm spectral range, providing 50% greater quantum efficiency. At 650nm, Hi-QE Red provides 22% QE - versus 16% in the standard S25 photocathode. Notably, at 900nm the Hi-QE red photocathode offers a 50% improvement over the traditional S25 photocathode.

Hi-QE Photocathodes are available in these photon detectors:
Cricket™² Advanced Image Intensifier Adapter | Photonis
Hybrid Photo Diodes
Image Intensifiers
MCP-PMT Detectors
Planacon Square MCP-PMT Detector
