Environmentally friendly and degradable organic neuromorphic vision sensors

Abstract

Transient electronic devices can help eliminate the growing environmental problem of “electronic pollution.” However, their applications are severely limited by poor optoelectronic performance. Here, a new degradable polymeric dielectric material is synthesized by a one-step method for organic neuromorphic vision sensors (ONeuVSs). A high mobility of 2.74 cm² V⁻¹ s⁻¹ and current on/off ratio greater than 10⁹ were obtained. Moreover, we achieved excellent optical figures of merit with a maximum photosensitivity of 8.7 × 10⁸ and maximum detectivity of 9.42 × 10¹⁶ Jones, which are the best values among transient electronic devices. The ONeuVS array could perform static image recognition with an accuracy of 92.7% and high-pass filtering behavior. More interestingly, both high-performance optical synapses and switching functional devices could be realized by modulating the organic semiconductors with or without alkyl chains. This study provides insights for developing a low-cost and environmentally friendly approach for constructing degradable ONeuVSs with sensing, memory, and processing in one device.