Increasing organic vertical carrier mobility for the application of high speed bilayered organic photodetector

Wu Wei Tsai, Yu Chiang Chao, En Chen Chen, Hsiao Wen Zan, Hsin Fei Meng, Chain Shu Hsu

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The direct influence of the vertical carrier mobility on the frequency response of bilayered organic photodiodes (PDs) is investigated for the first time. With fullerene as the acceptor material, changing vertical hole mobility from 2.3 × 10-5 to 2.8 × 10-4 cm2/V s increases PD bandwidth from 10 to 80 MHz under a 4 V operation. The influence of deposition rate on vertical hole mobility of pentacene film is also discussed. Our results facilitate the application of bilayered organic PDs on the detection of very-high-frequency optical signals.

Original languageEnglish
Article number213308
JournalApplied Physics Letters
Issue number21
Publication statusPublished - 2009 Dec 14


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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