材料科学
光电子学
光电探测器
光电流
聚合物
极化(电化学)
光学
复合材料
物理
物理化学
化学
作者
Pratik Sen,Ruonan Yang,Jeromy James Rech,Yuanxiang Feng,Carr Hoi Yi Ho,Jinsong Huang,Franky So,R. Joseph Kline,Wei You,Michael W. Kudenov,Brendan T. O’Connor
标识
DOI:10.1002/adom.201801346
摘要
Abstract In this report, a high‐performance all‐polymer organic photodetector that is sensitive to linearly polarized light throughout the visible spectrum is demonstrated. The active layer is a bulk heterojunction composed of an electron donor polymer PBnDT‐FTAZ and acceptor polymer P(NDI2OD‐T2) that have complementary spectral absorption resulting in efficient detection from 350 to 800 nm. The blend film exhibits good ductility with the ability to accommodate large strains of over 60% without fracture. This allows the film to undergo large uniaxial strain resulting in in‐plane alignment of both polymers making the film optically anisotropic and intrinsically polarization sensitive. The films are characterized by UV–vis spectroscopy and grazing incidence wide‐angle X‐ray scattering showing that both polymers have similar in‐plane backbone alignment and maintain packing order after being strained. The films are integrated into devices and characterized under linear polarized light. The strain‐oriented detectors have maximum photocurrent anisotropies of 1.4 under transverse polarized light while maintaining peak responsivities of 0.21 A W −1 and a 3 dB cutoff frequency of ≈1 kHz. The demonstrated performance is comparable to the current state of the art all‐polymer photodetectors with the added capability of polarization sensitivity enabling new application opportunities.
科研通智能强力驱动
Strongly Powered by AbleSci AI