The authors report on solution-processed organic thin-film phototransistors based on donor/acceptor dyad. The drain current increases significantly and the switch-on voltage is shifted toward positive bias as the incident light intensity is raised. Photoconductivity and the photovoltaic effect are assumed to be the underlying mechanism. Maximum responsivities of 0.3 and 0.03A∕W were obtained under irradiation at 370nm at an incident light intensity of 1.4μW∕cm2 and irradiation using a tungsten halogen lamp at an incident light intensity of 0.32mW∕cm2, respectively.
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Saragi et al. (2007) studied this question.
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