Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors

The trap-assisted charge injection in polyfluorene-poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) model systems with an Al or Al/LiF cathode is investigated. We find that inserting 1.3 nm LiF increases electron and hole injections simultaneously and the increase of holes is gre...

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Autores principales: Wang, Dongdong, Fina, Michael, Kim, Suhan, Zhang, Chunmei, Zhang, Ting, Deng, Yonghong, Chen, Kai, Liang, Lijuan, Mao, Samuel S., Minor, Andrew M., Liu, Gao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6695836/
https://www.ncbi.nlm.nih.gov/pubmed/31366052
http://dx.doi.org/10.3390/ma12152427
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author Wang, Dongdong
Fina, Michael
Kim, Suhan
Zhang, Chunmei
Zhang, Ting
Deng, Yonghong
Chen, Kai
Liang, Lijuan
Mao, Samuel S.
Minor, Andrew M.
Liu, Gao
author_facet Wang, Dongdong
Fina, Michael
Kim, Suhan
Zhang, Chunmei
Zhang, Ting
Deng, Yonghong
Chen, Kai
Liang, Lijuan
Mao, Samuel S.
Minor, Andrew M.
Liu, Gao
author_sort Wang, Dongdong
collection PubMed
description The trap-assisted charge injection in polyfluorene-poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) model systems with an Al or Al/LiF cathode is investigated. We find that inserting 1.3 nm LiF increases electron and hole injections simultaneously and the increase of holes is greater than electrons. The evolution of internal interfaces within polymer light-emitting diodes is observed by transmission electron microscopy, which reveals that the introduction of LiF improves the interface stability at both the cathode (cathode/polymer) and the anode (indium tin oxide (ITO)/PEDOT:PSS). Above-mentioned experimental results have been compared to the numerical simulations with a revised Davids model and potential physical mechanisms for the trap-assisted charge injection are discussed.
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spelling pubmed-66958362019-09-05 Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors Wang, Dongdong Fina, Michael Kim, Suhan Zhang, Chunmei Zhang, Ting Deng, Yonghong Chen, Kai Liang, Lijuan Mao, Samuel S. Minor, Andrew M. Liu, Gao Materials (Basel) Article The trap-assisted charge injection in polyfluorene-poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) model systems with an Al or Al/LiF cathode is investigated. We find that inserting 1.3 nm LiF increases electron and hole injections simultaneously and the increase of holes is greater than electrons. The evolution of internal interfaces within polymer light-emitting diodes is observed by transmission electron microscopy, which reveals that the introduction of LiF improves the interface stability at both the cathode (cathode/polymer) and the anode (indium tin oxide (ITO)/PEDOT:PSS). Above-mentioned experimental results have been compared to the numerical simulations with a revised Davids model and potential physical mechanisms for the trap-assisted charge injection are discussed. MDPI 2019-07-30 /pmc/articles/PMC6695836/ /pubmed/31366052 http://dx.doi.org/10.3390/ma12152427 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Dongdong
Fina, Michael
Kim, Suhan
Zhang, Chunmei
Zhang, Ting
Deng, Yonghong
Chen, Kai
Liang, Lijuan
Mao, Samuel S.
Minor, Andrew M.
Liu, Gao
Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title_full Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title_fullStr Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title_full_unstemmed Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title_short Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors
title_sort trap-assisted charge injection into large bandgap polymer semiconductors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6695836/
https://www.ncbi.nlm.nih.gov/pubmed/31366052
http://dx.doi.org/10.3390/ma12152427
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