Characteristics of Organic Phototransistors with p-Channel Near Infrared Light–Sensing Conjugated Polymers
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Next-generation sensors have been recognized as a game changer in the coming fourth industrial revolution era when it comes to the recent fast advances in electronics and semiconductors. A particular attention can be paid to infrared sensors because the infrared range cannot be seen with human eyes. As autonomous cars are being ready for wide-spreading, the light detection and ranging (LiDAR) technology has been spotlighted and requires near infrared (NIR) sensors with flexible shapes. However, conventional NIR sensors based on inorganic materials have a limitation toward flexibility owing to the inherent nature of inorganic materials. In this regard, our group has focused on NIR light-sensing organic phototransistors (NIR-OPTRs) with polymeric semiconductors for the last ten years. In this presentation, we demonstrate NIR-OPTRs with p-channel conjugated polymers which can detect the NIR light suitable for the LiDAR application.