Flexible Organic Phototransistors With Limit of Detection Down to 28 pW/cm2

Le résumé fourni par la source

Over the past few years, most applications in the field of light sensing have required devices able to detect light intensities as low as pW/cm2. At the same time, the rise of organic-based sensors is meeting no stops because of the desired properties that organic materials provide, like flexibility, lightweight, low cost, and low temperature processability. Low-intensity light signal detectors are growing in a huge number of fields. In prostate cancer treatment, modern proton therapy requires the detection of very low light intensities generated by scintillators that convert the proton flux into a light signal; moreover, in robotics, the most recent products need to detect light both in the sunlight and at nighttime, when the illumination intensity is lower. Here, we report on a flexible organic phototransistor (OPT) with impressive low-light detection, with a limit of detection (LoD) down to 28 pW/cm2. The OPT works reliably in different environments, acting at low polarization bias down to −1 V. These results show the perspective of a new class of light detectors based on a low-cost manufacturing process for flexible applications.

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