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17 October 2023 A large-size position sensitive detector based on photoreceptor protein and conductive polymer
Yoshiko Okada-Shudo, Arashi Shirota
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Proceedings Volume PC12741, Advanced Materials, Biomaterials, and Manufacturing Technologies for Security and Defence; PC127410A (2023) https://doi.org/10.1117/12.2684194
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands
Abstract
The photoreceptor protein bacteriorhodopsin (bR) has a solar function and is therefore used in sensors that do not require a bias power supply. A position-sensitive detector (PSD) is a monolithic photosensor utilising photodiode surface resistance that can measure a position of a light spot incident on a surface. Compared to discrete element detectors such as CCD/CMOS arrays, PSD provides continuous position measuring and high position resolution. This study presents 1D and 2D PSD based on bR and conductive polymer instead of semiconductors. A bR-polymer-PSD consists of a drop-casted bR film on a thin polymer film and a counter-thick polymer electrode. The nonlinearity of the one-dimensional PSD (light-receiving length 6.0 cm) is 2.3-2.5%, well below the 15% tolerance of semiconductor PSDs, and an all-organic one-dimensional PSD is realised at the cost of about 1/1500 of a semiconductor PSD. Furthermore, a two-dimensional PSD (photosensitive area 3.0 × 3.0 cm2) showed the feasibility of an all-organic two-dimensional PSD at about 1/500. However, the maximum position detection error was insufficient at 20 to 30 %.
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Yoshiko Okada-Shudo and Arashi Shirota "A large-size position sensitive detector based on photoreceptor protein and conductive polymer", Proc. SPIE PC12741, Advanced Materials, Biomaterials, and Manufacturing Technologies for Security and Defence, PC127410A (17 October 2023); https://doi.org/10.1117/12.2684194
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KEYWORDS
Polymers
Electrical conductivity
Proteins
Semiconductors
Polymer thin films
Power supplies
Resistance
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