Large-area low-noise flexible organic photodiodes for detecting faint visible light

Silicon photodiodes are the foundation of light-detection technology; yet their rigid structure and limited area scaling at low cost hamper their use in several emerging applications. A detailed methodology for the characterization of organic photodiodes based on polymeric bulk heterojunctions reveals the influence that charge-collecting electrodes have on the electronic noise at low frequency. The performance of optimized organic photodiodes is found to rival that of low-noise silicon photodiodes in all metrics within the visible spectral range, except response time, which is still video-rate compatible. Solution-processed organic photodiodes offer several design opportunities exemplified in a biometric monitoring application that uses ring-shaped, large-area, flexible, organic photodiodes with silicon-level performance.

Source: ScienceNOW - November 5, 2020 Category: Science Authors: Fuentes-Hernandez, C., Chou, W.-F., Khan, T. M., Diniz, L., Lukens, J., Larrain, F. A., Rodriguez-Toro, V. A., Kippelen, B. Tags: Physics, Applied, Physics reports Source Type: news