Point Grey publishes QE and characteristics for sensors used in Blackfly and Grasshopper 3 cameras
Point Grey released two PDF documents for Blackfly and Grasshopper 3 cameras. You will find quantum efficiency charts (sensitivity) as well as noise and other handy informations for each sensor available in those cameras.
Mentioned camera lines use latest Sony CCDs that reach QE of around 70%. They in general are of good performance, although those bigger ones won't be cheap. One of Blackfly cameras uses E2V CMOS sensor - EV76C560. It provides lower sensitivity, but it gives quite big diagonal and speed at a low price. This sensor is available also in IDS Imaging cameras and was used/tested in astrophotography earlier.
You can also check my cameras list for sensor and other informations.