Conducting Polymer Color Sensor

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Abstract
A color sensor device using conducting polymer poly(3-hexylthiophene) (PAT6), has been fabricated and characterized. The device consists of two photocells made of the same conducting polymer with different polymer thicknesses, and which exploits the difference in the photocurrent spectrum of the photocells. The color of the irradiated light can be detected by measuring the ratio of the short-circuit photocurrent of two photocells with different PAT6 thicknesses. The color sensor proposed here is suitable for large-area sensor systems such as the integrated image sensor device because of its simple structure.