Issue 13, 2012
From the journal:

Journal of Materials Chemistry

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

Tengling Ye,a   Minrong Zhu,b   Jiangshan Chen,*a   Qiang Fu,a   Fangchao Zhao,a   Changsheng Shi,a   Yue Hu,a   Dongge Ma*a  and  Chuluo Yang*b  

* Corresponding authors

a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
E-mail: jschen@ciac.jl.cn, mdg1014@ciac.jl.cn
Fax: +86-431-85262873
Tel: +86-431-85262357

b Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People's Republic of China
E-mail: clyang@whu.edu.cn

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

DOI
https://doi.org/10.1039/C2JM16061G
Article type
Paper
Submitted
22 Nov 2011
Accepted
24 Jan 2012
First published
22 Feb 2012

J. Mater. Chem., 2012,22, 6413-6418

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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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