[18a-B409-1~9] 12.3 Functional Materials and Novel Devices

[18a-B409-3] Light-Addressable Potentiometric Sensor Using Organic Semiconductor Bulk Heterojunction

〇Hiroyuki Matsui¹, Yuanyuan Guo², Georgios Bairaktaris³ (1.ROEL, Yamagata Univ., 2.FRIS, Tohoku Univ., 3.ATI, Univ. of Surrey)

Keywords:light-addressable potentiometric sensor, organic semiconductor, bulk heterojunction

Light-addressable potentiometric sensors (LAPS) can image the surface potential of electrolyte and, if combined with various sensitive membranes, the distribution of chemical species. Conventional LAPS devices have been made of silicon wafers, which are rigid, thick, and not biocompatible. Organic LAPS was first reported in 2021 with a C₆₀ active layer. However, the issues of air stability and bipolar characteristics remain. Here we show a novel organic LAPS with organic semiconductor bulk heterojunction for flexible, biocompatible, and air-stable chemical imaging.