Recent advances in polymer phototransistors

A phototransistor, a kind of optoelectronic device that realizes the functionality of light detection and signal magnification in a single device, is an important component of optoelectronic integration. Polymer phototransistors, compared to traditional inorganic phototransistors, demonstrate attractive advantages of light-weight, low-cost, easy solution processing and flexibility, and are the best candidates for Plastic Optoelectronics. Over the past few years, significant advances have been made in polymer phototransistors with the development of new polymer semiconductor materials and the optimization of device fabrication techniques. In this review, we will give an overview of the recent advances in polymer phototransistors, from a brief introduction of the device geometry, working mechanism, performance parameters to the development of the device performance and the exploration of their flexible optoelectronic devices. Finally, a perspective and conclusion is also briefly addressed.