High sensitivity radiation sensing by photoinduced doping in PPV derivatives

We report the properties of MEH-PPV/onium salt blends which we find to be doped by a photoinduced electron-transfer reaction on photoabsorption in the MEH-PPV. The quantum efficiency of this process is determined as a function of the incident photon energy, and compared with the corresponding photocurrent quantum efficiency. This system can be used to measure a cumulative dose of visible or high-energy radiation.