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Fluorene-Type Polymer Photodetectors Doped with Iridium and Platinum Complexes as Opto-Electrical Conversion Devices

Published online by Cambridge University Press:  13 August 2012

Hirotake Kajii ,
Hiroki Ohmori ,
Yusuke Sato ,
Akihiro Katsura  and
Yutaka Ohmori
Hirotake Kajii
Affiliation:
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
Hiroki Ohmori
Affiliation:
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
Yusuke Sato
Affiliation:
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
Akihiro Katsura
Affiliation:
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
Yutaka Ohmori
Affiliation:
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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Abstract

To improve the conversion efficiency of polymer photodetectors (PDs) fabricated by solution process, the properties of fluorene-type polymer photodetectors doped with iridium (Ir) and platinum (Pt) complexes were investigated. The devices based on poly(dioctylfluorene) and poly(dioctylfluorene-co-benzothiadiazole) (F8BT) had violet and blue sensitivity, respectively. Triplet materials can enhance the incident-photon-to-current conversion efficiency of the devices utilizing the fluorene-type polymers when their triplet levels are lower than the lowest excited singlet states of the host and higher than the lowest excited triplet states of the host. The transmission of a moving picture was successfully demonstrated using the bilayer F8BT device with green Ir complex as an opto-electrical conversion device. We demonstrate that the polymer PDs fabricated by solution process can be applied to short-range optical communication fields, such as opto-electrical conversion devices for optical links.

Keywords

optical propertiesoptoelectronicphotovoltaic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1435: Symposium J – Organic and Hybrid-Organic Electronics , 2012 , mrss12-1435-j14-20
Copyright
Copyright © Materials Research Society 2012

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References

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