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A hybrid organic semiconductor/silicon photodiode for efficient ultraviolet photodetection

Levell, Jack William and Giardini, Mario Ettore and Samuel, I.D.W. (2010) A hybrid organic semiconductor/silicon photodiode for efficient ultraviolet photodetection. Optics Express, 18 (4). pp. 3219-3225. ISSN 1094-4087

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Abstract

A method employing conjugated polymer thin film blends is shown to provide a simple and convenient way of greatly enhancing the ultraviolet response of silicon photodetectors. Hybrid organic semiconductor/silicon photodetectors are demonstrated using fluorene copolymers and give a quantum efficiency of 60% at 200 nm. The quantum efficiency is greater than 34% over the entire 200-620 nm range. These devices show promise for use in high sensitivity, low cost UV-visible photodetection and imaging applications.