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Issue 13, 2012
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Efficient electron injection layer based on thermo-cleavable materials for inverted bottom-emission polymer light emitting diodes

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Abstract

The electron injection material PF-EP was found to be thermo-cleavable. Its solubility in chlorobenzene can be adjusted by thermal treatment at different temperatures. By analyzing the results of TGA, FT-IR, and 13C solid-state NMR, we interpret that the solubility transition is caused by partial acidification, crosslinking through a hydrogen-bonded network and coordination of O, P and Li. Based on this thermo-cleavable approach, efficient fully solution-processed IBPLEDs were successfully fabricated. The maximum current efficiency of the device with 2.5% Li2CO3 doped PF-EP as the EIL reaches nearly 1.7 times of that of a conventional device. We attribute the high performance to the good electron injection and hole blocking abilities of PF-EP and Li2CO3.

Graphical abstract: Efficient electron injection layer based on thermo-cleavable materials for inverted bottom-emission polymer light emitting diodes

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Article information


Submitted
22 Nov 2011
Accepted
24 Jan 2012
First published
22 Feb 2012

J. Mater. Chem., 2012,22, 6413-6418
Article type
Paper

Efficient electron injection layer based on thermo-cleavable materials for inverted bottom-emission polymer light emitting diodes

T. Ye, M. Zhu, J. Chen, Q. Fu, F. Zhao, C. Shi, Y. Hu, D. Ma and C. Yang, J. Mater. Chem., 2012, 22, 6413
DOI: 10.1039/C2JM16061G

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