High Performance Flexible Organic Phototransistors with Ultrashort Channel Length

• DOI: 10.1021/acsphotonics.8b00729
• Publication Date: 2018-08-09T16:57:55Z
• Authors: Jianfeng Zhong; Xiaomin Wu; Shuqiong Lan; Yuan Fang; Huipeng Chen; Tailiang Guo
• Keywords: Photodiode; Photoelectric effect

Organic phototransistors with high responsivity and sensitivity to light irradiance have great potential applications in environmental monitoring, space exploration, security, image sensors healthcare systems. In this manuscript, a novel polymer bulk heterojunction field effect phototransistor ultrashort channel length (tens of nanometers) ultrahigh visible was proposed. Due the nanoscale structure, high-performance 750 A/W, photosensitivity 1.0 × 106, detectivity as 4.54 1015 Jones demonstrated under 720 nm illumination 0.1 mW/cm2 intensity, which even better that those lateral organic phototransistors. Moreover, were investigated for first time on flexible substrate, exhibited outstanding mechanical flexibility due their unique designs. Further investigation correlation between morphology blends device photoresponse performance indicated photoelectric properties devices could be effectively enhanced by controlling semiconducting layers. More importantly, work provided clear experimental evidence surface area crystals would significantly impact dissociation photoinduced excitons transfer recombination photogenerated carriers, is crucial This critical guidelines development phototransistors, opened up doors opportunity wide range electronics.