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All-organic optocouplers based on polymer light-emitting diodes and photodetectors

✍ Scribed by Stathopoulos, N. A. ;Palilis, L. C. ;Vasilopoulou, M. ;Botsialas, A. ;Falaras, P. ;Argitis, P.

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
203 KB
Volume
205
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

In this work, we demonstrate all organic flexible polymeric optocouplers by utilizing a donor‐acceptor bulk heterojunction polymer photodetector (PD) as the output unit and a polymer light‐emitting diode (PLED) as the input unit. The input unit is a single‐layer PLED on a glass or a plastic (PET) substrate utilizing a green emitting polyfluorene‐benzothiadiazole copolymer in the active layer. The output unit is a single‐layer PD on a glass substrate utilizing a P3HT:PCBM(1:1 by weight) blend, where P3HT is regioregular poly(3‐hexylthiophene) and PCBM is (6,6)‐phenyl‐C~61~‐butyric acid methyl ester. The electroluminescence spectrum of the PLED peaks at 530 nm and covers a spectral range that coincides quite well with the PD absorption spectrum (between 450 and 650 nm). The current density transfer ratio reaches 0.012% for an optocoupler that operates at 0 V and 15 V for the PD and PLED, respectively. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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