Photocurrent extraction efficiency in colloidal quantum dot photovoltaics

Handle URI:
http://hdl.handle.net/10754/599183
Title:
Photocurrent extraction efficiency in colloidal quantum dot photovoltaics
Authors:
Kemp, K. W.; Wong, C. T. O.; Hoogland, S. H.; Sargent, E. H.
Abstract:
The efficiency of photocurrent extraction was studied directly inside operating Colloidal Quantum Dot (CQD) photovoltaic devices. A model was derived from first principles for a thin film p-n junction with a linearly spatially dependent electric field. Using this model, we were able to clarify the origins of recent improvement in CQD solar cell performance. From current-voltage diode characteristics under 1 sun conditions, we extracted transport lengths ranging from 39 nm to 86 nm for these materials. Characterization of the intensity dependence of photocurrent extraction revealed that the dominant loss mechanism limiting the transport length is trap-mediated recombination. © 2013 AIP Publishing LLC.
Citation:
Kemp KW, Wong CTO, Hoogland SH, Sargent EH (2013) Photocurrent extraction efficiency in colloidal quantum dot photovoltaics. Applied Physics Letters 103: 211101. Available: http://dx.doi.org/10.1063/1.4831982.
Publisher:
AIP Publishing
Journal:
Applied Physics Letters
KAUST Grant Number:
KUS-11-009-21
Issue Date:
2013
DOI:
10.1063/1.4831982
Type:
Article
ISSN:
0003-6951
Sponsors:
We thank Angstrom Engineering and Innovative Technology for useful discussions regarding material deposition methods and control of glovebox environment, respectively. This publication is based on part of work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada.
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKemp, K. W.en
dc.contributor.authorWong, C. T. O.en
dc.contributor.authorHoogland, S. H.en
dc.contributor.authorSargent, E. H.en
dc.date.accessioned2016-02-25T13:54:27Zen
dc.date.available2016-02-25T13:54:27Zen
dc.date.issued2013en
dc.identifier.citationKemp KW, Wong CTO, Hoogland SH, Sargent EH (2013) Photocurrent extraction efficiency in colloidal quantum dot photovoltaics. Applied Physics Letters 103: 211101. Available: http://dx.doi.org/10.1063/1.4831982.en
dc.identifier.issn0003-6951en
dc.identifier.doi10.1063/1.4831982en
dc.identifier.urihttp://hdl.handle.net/10754/599183en
dc.description.abstractThe efficiency of photocurrent extraction was studied directly inside operating Colloidal Quantum Dot (CQD) photovoltaic devices. A model was derived from first principles for a thin film p-n junction with a linearly spatially dependent electric field. Using this model, we were able to clarify the origins of recent improvement in CQD solar cell performance. From current-voltage diode characteristics under 1 sun conditions, we extracted transport lengths ranging from 39 nm to 86 nm for these materials. Characterization of the intensity dependence of photocurrent extraction revealed that the dominant loss mechanism limiting the transport length is trap-mediated recombination. © 2013 AIP Publishing LLC.en
dc.description.sponsorshipWe thank Angstrom Engineering and Innovative Technology for useful discussions regarding material deposition methods and control of glovebox environment, respectively. This publication is based on part of work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada.en
dc.publisherAIP Publishingen
dc.titlePhotocurrent extraction efficiency in colloidal quantum dot photovoltaicsen
dc.typeArticleen
dc.identifier.journalApplied Physics Lettersen
dc.contributor.institutionUniversity of Toronto, Toronto, Canadaen
kaust.grant.numberKUS-11-009-21en
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