High-performance and Fast-Response Organic photodetector Based on benzobisoxazole polymer engineering.
발표자
()
초록
내용
Static and dynamic properties are important parameters for evaluating the p-n bulk heterojunction (BHJ) organic photodetectors (OPDs) performance. Recently, we first reported a novel PCP based-on benzobisoxazole (BBO) moiety for high-performance OPDs. In this study, the superior OPD performance was achieved in the non-fullerene acceptor (NFA) OPDs by molecular-modified BBO-based PCP using an octylthiophene as a π-spacer. The PCP with octylthiophene (POTB) increased intermolecular alignment between PCP and NFA in face-on-face mode which can induce the effective vertical charge transport in the device. As a result, the promising OPD performance with a responsivity (R) value of 0.43 A/W and specific detectivity (D*) value of 1.71×1013 Jones was achieved at -1.0 V under 5.00 mW/cm2 of green light irradiation. Notably, -3 dB cut-off frequency of the device was 20 times higher and the falling signal response time was 10 times faster than those of other devices.