We report the observation of photoluminescence quenching in thin films of poly(3‐hexylthiophene) and Langmuir–Blodgett films of poly(3‐hexylthiophene)/arachidic acid by the injection of positive charges in the polymer. Charge injection was made in a polymer field effect transistor, used in what we name the luministor mode. The quenching is discussed in terms of polarons/bipolarons acting as recombination centra for the excitons, suppressing the photoluminescence. The inverse phenomenon, luminescence enhancement by depletion of charges, has also been achieved.
Dyreklev, P., Inganäs, O., Paloheimo, J., & Stubb, H. (1992). Photoluminescence quenching in a polymer thin-film field-effect luministor. Journal of Applied Physics, 71(6), 2816-2820. https://doi.org/10.1063/1.351010