NBP/NPD A new air stable Solid organic semiconductor UV Photocathode

Abstract

A new air stable organic semiconductor Polymer NBP/NPD was investigated as solid UV photocathode for use in gaseous UV photon detedctors. QE was measured as a function of photon wavelength in spectral region 190-250nm and shows cut off near 240nm. Although, its quantum efficiency (QE) is very low as compared to CsI but being air stabile solid and preparation of photocathodes with large surface area it can be suitable potential photocathode in plasma diagnositic, barium flouride scintilation based calorimetry and very high photon flux experiments.