Recent progresses of organic photonic synaptic transistors

The use of electronic devices to emulate the unique properties of biological synapses is regarded as the key for the development of the artificial intelligence era to replace the conventional von Neumann's computing systems. Nowadays, many electronic devices have been proposed to simulate synaptic functions. However, organic photonic synaptic transistors (OPSTs) arise as an ideal candidate due to their comparative advantages, including the facile preparation process, the easy integration, and the tunable optoelectronic properties than the other devices configurations. As a result, they have attracted tremendous attention. Along these lines, in this review, the structure, working principle and synaptic function of the OPSTs are introduced in detail, while several common channel materials and their working mechanism are listed. Finally, the latest progress in the related application fields is introduced, and the perspectives for the future development of photonic synaptic transistors.