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POLYFLUORENE-ACCEPTOR CONJUGATED POLYMER FORLED APPLICATIONS

POLYFLUORENE-ACCEPTOR CONJUGATED POLYMER FORLED APPLICATIONS

Author: AKANKSHA PATHAK*, ,

*[M.tech] Birla Institute of Technology and Science Pilani, Pilani (Rajasthan) India.

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Abstract
Now a days, polymers are used in many electronic devices, with the challenge of obtaining highest efficiency. Many Organic polymers are used as an organic layer in organic light emitting diode (OLEDs) and organic photovoltaic cells (OPCs), which is due to the presence of the p-conjugated oligomers. For our report we have reviewed many conjugated polymers including Polyfluorene. It has high efficiency in comparison to other conjugated polymer but since it is a hole transport dominated material, mobility of electrons is limited and hence Polyfluorene can be incorporated with different acceptors segments, like quinoxaline (Q), 2,1,3-benzothiadiazole (BT) and thieno[3,4-b]-pyrazine (TP). These three fluorene- acceptor (PFQ, PFBT, PFTP) were incorporated and investigated in the literature. There properties were then compared with the parent Polyfluorene. It was found that tuning of various electronic and optoelectronic properties could be achieved by the incorporation of various acceptor segments and their concentration. Moreover, acceptor strength significantly affects the properties due to intramolecular charge transfer. However, high rate of charge transfer results in fluorescence quenching and thus reduces the photoluminescence efficiency. For this purpose binary blend structure (such as PF with PFQ , PF with PFBT) proved more significant as they show high rate of charge transfer along with the high photoluminescence efficiency.

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