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Comparative Study on Polymer Light-Emitting Devices Based on Blends of Polyfluorene and 4,7-di-2-thienyl-2,1,3-benzothiadiazole With Devices Based on Copolymer of the Same Composition

Comparative Study on Polymer Light-Emitting Devices Based on Blends of Polyfluorene and 4,7-di-2-thienyl-2,1,3-benzothiadiazole With Devices Based on Copolymer of the Same Composition

Suqin Fan, Mingliang Sun, Zhao Chen, Jie Luo, Qiong Hou, Junbiao Peng, Hong Yang, Dengqing Zhang, Fuyou Li, Yong Cao

J Phys Chem B. 2007 Jun 7;111(22):6113-7.

PMID: 17500553

Abstract:

The small molecule 4,7-di-2-thienyl-2,1,3-benzothiadiazole (DBT) dye has been synthesized and blended into blue-emitting polyfluorene as a host. The photophysics of the blend films and electroluminescence device performance was compared with that from polyfluorene-co-4,7-di-2-thienyl-2,1,3-benzothiadiazole (PFO-DBT) copolymer of the same molar composition, with DBT incorporated covalently into the polyfluorene backbone. The role of intra- and interpolymer chain interaction and energy transfer in the polymer light-emitting devices are discussed. On the basis of the direct comparison of blend and copolymer from the same molecular composition, we can draw the conclusion that, in conjugated polymers, intrachain energy transfer along the polymer backbone is more efficient than that via interchain interaction and plays a more important role in polymer light-emitting devices.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS77357	PFO-DBT			Price

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