skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors

Abstract

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.

Authors:
 [1];  [2];  [3];  [1];  [4];  [5]; ORCiD logo [6];  [7];  [2]; ORCiD logo [8];  [3]
+ Show Author Affiliations
  1. Beijing Inst. of Graphic Communication, Beijing (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Beijing Inst. of Technology, Beijing (China)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); South China Univ. of Technology. Guangzhou (China)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Xi'an Jiaotong Univ., Xi'an (China)
  7. Beijing Inst. of Graphic Communication, Beijing (China)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1572036
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Materials
Additional Journal Information:
Journal Volume: 12; Journal Issue: 15; Journal ID: ISSN 1996-1944
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; charge injection; trap; interface stability; polymer light-emitting diodes

Citation Formats

Wang, Dongdong, Fina, Michael, Kim, Suhan, Zhang, Chunmei, Zhang, Ting, Deng, Yonghong, Chen, Kai, Liang, Lijuan, Mao, Samuel S., Minor, Andrew M., and Liu, Gao. Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors. United States: N. p., 2019. Web. doi:10.3390/ma12152427.
Copy to clipboard
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. United States. doi:10.3390/ma12152427.
Copy to clipboard
Wang, Dongdong, Fina, Michael, Kim, Suhan, Zhang, Chunmei, Zhang, Ting, Deng, Yonghong, Chen, Kai, Liang, Lijuan, Mao, Samuel S., Minor, Andrew M., and Liu, Gao. Tue . "Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors". United States. doi:10.3390/ma12152427. https://www.osti.gov/servlets/purl/1572036.
Copy to clipboard
@article{osti_1572036,
title = {Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors},
author = {Wang, Dongdong and Fina, Michael and Kim, Suhan and Zhang, Chunmei and Zhang, Ting and Deng, Yonghong and Chen, Kai and Liang, Lijuan and Mao, Samuel S. and Minor, Andrew M. and Liu, Gao},
abstractNote = {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.},
doi = {10.3390/ma12152427},
journal = {Materials},
number = 15,
volume = 12,
place = {United States},
year = {2019},
month = {7}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI:  10.3390/ma12152427
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Characteristics of Polymer Light Emitting Diodes with the LiF Anode Interfacial Layer
journal, April 2006

  • Sohn, Sunyoung; Park, Keunhee; Lee, Daewoo
  • Japanese Journal of Applied Physics, Vol. 45, Issue 4B
  • DOI: 10.1143/JJAP.45.3733

Hole-enhanced electron injection from ZnO in inverted polymer light-emitting diodes
journal, September 2012

Nonradiative recombination centers and electrical aging of organic light-emitting diodes: Direct connection between accumulation of trapped charge and luminance loss
journal, January 2003

  • Kondakov, D. Y.; Sandifer, J. R.; Tang, C. W.
  • Journal of Applied Physics, Vol. 93, Issue 2
  • DOI: 10.1063/1.1531231

Relation between the built-in voltage in organic light-emitting diodes and the zero-field voltage as measured by electroabsorption
journal, March 2010

  • de Vries, R. J.; van Mensfoort, S. L. M.; Janssen, R. A. J.
  • Physical Review B, Vol. 81, Issue 12
  • DOI: 10.1103/PhysRevB.81.125203

Shadow FIBing- Using Geometry to Prepare TEM Samples
journal, August 2005

Degradation Mechanisms in Small-Molecule and Polymer Organic Light-Emitting Diodes
journal, June 2010

Polymeric anodes for improved polymer light-emitting diode performance
journal, April 1997

  • Carter, S. A.; Angelopoulos, M.; Karg, S.
  • Applied Physics Letters, Vol. 70, Issue 16
  • DOI: 10.1063/1.118953

Current injection from a metal to a disordered hopping system. III. Comparison between experiment and Monte Carlo simulation
journal, September 1999

The Built-In Potential in Blue Polyfluorene-Based Light-Emitting Diodes
journal, June 2008

  • Bodrozic, Vladimir; Brown, Thomas M.; Mian, Shabbir
  • Advanced Materials, Vol. 20, Issue 12
  • DOI: 10.1002/adma.200702346

Imaging the Interfaces of Conjugated Polymer Optoelectronic Devices
journal, February 2008

Electro-optical properties of a polymer light-emitting diode with an injection-limited hole contact
journal, February 2003

  • van Woudenbergh, T.; Blom, P. W. M.; Huiberts, J. N.
  • Applied Physics Letters, Vol. 82, Issue 6
  • DOI: 10.1063/1.1543255

Ohmic hole injection in poly(9,9-dioctylfluorene) polymer light-emitting diodes
journal, July 2003

  • Poplavskyy, D.; Nelson, J.; Bradley, D. D. C.
  • Applied Physics Letters, Vol. 83, Issue 4
  • DOI: 10.1063/1.1596722

Light-emitting diodes based on conjugated polymers
journal, October 1990

  • Burroughes, J. H.; Bradley, D. D. C.; Brown, A. R.
  • Nature, Vol. 347, Issue 6293
  • DOI: 10.1038/347539a0

FIB Sample Preparation of Polymer Thin Films on Hard Substrates Using the Shadow-FIB Method
journal, November 2009

Lifetime and degradation effects in polymer light-emitting diodes
journal, February 1999

  • Parker, I. D.; Cao, Y.; Yang, C. Y.
  • Journal of Applied Physics, Vol. 85, Issue 4
  • DOI: 10.1063/1.369564

Electron-Enhanced Hole Injection in Blue Polyfluorene-Based Polymer Light-Emitting Diodes
journal, July 2004

  • van Woudenbergh, T.; Wildeman, J.; Blom, P. W. M.
  • Advanced Functional Materials, Vol. 14, Issue 7
  • DOI: 10.1002/adfm.200305178

In-Situ Compositional and Structural Analysis of Plastic Solar Cells
journal, October 2002

Minimization of focused ion beam damage in nanostructured polymer thin films
journal, February 2011

Tandem injection of charge carriers across a metal-dielectric interface
journal, October 2000

  • Arkhipov, V. I.; Bässler, H.
  • Applied Physics Letters, Vol. 77, Issue 17
  • DOI: 10.1063/1.1320456

Polymeric conducting anode for small organic transporting molecules in dark injection experiments
journal, September 2006

  • Tse, S. C.; Tsang, S. W.; So, S. K.
  • Journal of Applied Physics, Vol. 100, Issue 6
  • DOI: 10.1063/1.2348640

Electric field screening in polymer light-emitting diodes
journal, October 2003

  • Lane, P. A.; deMello, J. C.; Fletcher, R. B.
  • Applied Physics Letters, Vol. 83, Issue 17
  • DOI: 10.1063/1.1623014

Influence of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) in polymer LEDs
journal, September 2006

Modification of PEDOT:PSS as hole injection layer in polymer LEDs
journal, May 2004

  • de Kok, M. M.; Buechel, M.; Vulto, S. I. E.
  • physica status solidi (a), Vol. 201, Issue 6
  • DOI: 10.1002/pssa.200404338

Carrier tunneling and device characteristics in polymer light‐emitting diodes
journal, February 1994

  • Parker, I. D.
  • Journal of Applied Physics, Vol. 75, Issue 3
  • DOI: 10.1063/1.356350

Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode
journal, January 1997

  • Hung, L. S.; Tang, C. W.; Mason, M. G.
  • Applied Physics Letters, Vol. 70, Issue 2
  • DOI: 10.1063/1.118344

Charge injection and recombination at the metal–organic interface
journal, January 1999

The influence of LiF thickness on the built-in potential of blue polymer light-emitting diodes with LiF/Al cathodes
journal, October 2001

Internal Field Screening in Polymer Light-Emitting Diodes
journal, June 2004

  • Brewer, P. J.; Lane, P. A.; deMello, A. J.
  • Advanced Functional Materials, Vol. 14, Issue 6
  • DOI: 10.1002/adfm.200305126

Barriers to electron extraction in polymer light-emitting diodes
journal, August 2001

  • Murata, K.; Cinà, S.; Greenham, N. C.
  • Applied Physics Letters, Vol. 79, Issue 8
  • DOI: 10.1063/1.1396627

The role of poly(3,4-ethylenedioxythiophene):poly(styrenesulphonate) as a hole injection layer in a blue-emitting polymer light-emitting diode
journal, November 2008

  • Bange, Sebastian; Kuksov, Andriy; Neher, Dieter
  • Journal of Applied Physics, Vol. 104, Issue 10
  • DOI: 10.1063/1.3021140

Device model for single carrier organic diodes
journal, December 1997

  • Davids, P. S.; Campbell, I. H.; Smith, D. L.
  • Journal of Applied Physics, Vol. 82, Issue 12
  • DOI: 10.1063/1.366522

Role of electron injection in polyfluorene-based light emitting diodes containing PEDOT:PSS
journal, May 2005

    [ × clear filter / sort ]

    Similar records in OSTI.GOV collections: