Extracting electrode space charge limited current: Charge injection into conjugated polyelectrolytes with a semiconductor electrode
Abstract
Conjugated polyelectrolytes and related mixed ionic-electronic conductors (MIECs) are being explored for energy applications including solid-state lighting and photovoltaics. Fundamental models of charge injection into MIECs have been primarily developed for MIECs contacted with highly conductive or metal electrodes (MEs), despite many potential applications involving semiconductors. We theoretically and experimentally demonstrate that an appropriate semiconductor electrode (SE), n-type for electron or p-type of hole injection, can limit injection into MIECs. When the SE is the injecting electrode and is under accumulation, there is little difference from a ME. When the SE acts as the extracting electrode, however, injection into the MIEC can be limited because a fraction of any applied bias must support charge depletion in the semiconductor rather than charge injection into the MIEC. In a ME/MIEC/SE system, this can lead to significant asymmetry in current-voltage and injected charge-voltage behavior.
- Publication Date:
- Research Org.:
- Univ. of Oregon, Eugene, OR (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1471494
- Alternate Identifier(s):
- OSTI ID: 1254196
- Grant/Contract Number:
- SC0012363
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 108; Journal Issue: 21; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Walker, Ethan M., and Lonergan, Mark C. Extracting electrode space charge limited current: Charge injection into conjugated polyelectrolytes with a semiconductor electrode. United States: N. p., 2016.
Web. doi:10.1063/1.4951676.
Walker, Ethan M., & Lonergan, Mark C. Extracting electrode space charge limited current: Charge injection into conjugated polyelectrolytes with a semiconductor electrode. United States. https://doi.org/10.1063/1.4951676
Walker, Ethan M., and Lonergan, Mark C. Mon .
"Extracting electrode space charge limited current: Charge injection into conjugated polyelectrolytes with a semiconductor electrode". United States. https://doi.org/10.1063/1.4951676. https://www.osti.gov/servlets/purl/1471494.
@article{osti_1471494,
title = {Extracting electrode space charge limited current: Charge injection into conjugated polyelectrolytes with a semiconductor electrode},
author = {Walker, Ethan M. and Lonergan, Mark C.},
abstractNote = {Conjugated polyelectrolytes and related mixed ionic-electronic conductors (MIECs) are being explored for energy applications including solid-state lighting and photovoltaics. Fundamental models of charge injection into MIECs have been primarily developed for MIECs contacted with highly conductive or metal electrodes (MEs), despite many potential applications involving semiconductors. We theoretically and experimentally demonstrate that an appropriate semiconductor electrode (SE), n-type for electron or p-type of hole injection, can limit injection into MIECs. When the SE is the injecting electrode and is under accumulation, there is little difference from a ME. When the SE acts as the extracting electrode, however, injection into the MIEC can be limited because a fraction of any applied bias must support charge depletion in the semiconductor rather than charge injection into the MIEC. In a ME/MIEC/SE system, this can lead to significant asymmetry in current-voltage and injected charge-voltage behavior.},
doi = {10.1063/1.4951676},
journal = {Applied Physics Letters},
number = 21,
volume = 108,
place = {United States},
year = {Mon May 23 00:00:00 EDT 2016},
month = {Mon May 23 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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