title: Effect of solvent on detectivity of solution-processed polymer photodetectors.
abstract: We demonstrate a high-performance solution-processed polymer photodetector (PPD) whose detectivity (D*) exceeds 10(11) Jones over almost the entire range of visible light. PPDs processed from a chlorobenzene solution using 1,8-diiodooctane (DIO) as an additive exhibit large crystalline domains with long-range order, in contrast to the featureless morphology of PPDs processed with pure solvent. Moreover, PPDs processed with DIO exhibit higher charge carrier mobility, and thus high photoconductive gain without compromising long carrier lifetime. Consequently, a high-loading ratio of DIO (3%) yielded a PPD whose D* in the visible range was over threefold higher than that of PPD without DIO.
authors.affiliation: School of Chemical Engineering and Material Science, Chung-Ang University, Seoul, South Korea. dchung@cau.ac.kr
authors.forename: Dae Sung
authors.initials: DS
authors.lastname: Chung
authors.forename: Hoyoul
authors.initials: H
authors.lastname: Kong