Spectroscopic Properties of Organic Photoconductors. III. Action Spectra for the Photoconduction of Cationic Dye Films

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Abstract
The action spectra for photoconduction in solid films of four cationic dyes have been measured. Both the response and the quantum yield curves have maxima at the main absorption peaks, which correspond to the singlet‐singlet transitions of the dye cations. The maximum efficiency of carrier production in rhodamine B is of the order of 0.1 electron excited per quantum absorbed.