Abstract
Abstract Pulsed photoconductivity measurements have been performed on crystals of phenazine using a dye laser tuned in the range 500-630 nm. Within this wavelength range the magnitude of generated charges is proportional to the second power of the light intensity indicating a two-photon generation pathway. Wavelength, temperature and electric field dependences of the photogeneration efficiency have been studied. The spectral dependence is almost flat between 510 and 600 nm. Activation energies of the photogeneration process are found to be ca. 0.11 eV and wavelength independent. It is concluded that the photogeneration pathway involves a two photon absorption to a singlet state, a radiationless decay and an interaction between the mobile lowest singlet state and a charge carrier trap. The process leads to the production of a free electron and a trapped hole.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
