F₄TCNQ-Induced Exciton Quenching Studied by Using in-situ Photoluminescence Measurements

The role of F₄TCNQ as an exciton quenching material in thin organic light-emitting films is investigated by means of in situ photoluminescence measurements. C₆₀ was used as another quenching material in the experiment for comparison, with Alq₃ as a common organic light-emitting material. The effect of the growth sequence of the materials on quenching was also examined. It is found that the radius of F?rster energy transfer between F₄TCNQ and Alq₃ is close to 0 nm and Dexter energy transfer dominates in the quenching process.