The donor-supply electrode enhances performance in colloidal quantum dot solar cells

Handle URI:
http://hdl.handle.net/10754/562871
Title:
The donor-supply electrode enhances performance in colloidal quantum dot solar cells
Authors:
Maraghechi, Pouya; Labelle, André J.; Kirmani, Ahmad R.; Lan, Xinzheng; Adachi, Michael; Thon, Susanna; Hoogland, Sjoerd H.; Lee, Anna; Ning, Zhijun; Fischer, Armin H.; Amassian, Aram ( 0000-0002-5734-1194 ) ; Sargent, E. H.
Abstract:
Colloidal quantum dot (CQD) solar cells combine solution-processability with quantum-size-effect tunability for low-cost harvesting of the sun's broad visible and infrared spectrum. The highest-performing colloidal quantum dot solar cells have, to date, relied on a depleted-heterojunction architecture in which an n-type transparent metal oxide such as TiO2 induces a depletion region in the p-type CQD solid. These devices have, until now, been limited by a modest depletion region depth produced in the CQD solid owing to limitations in the doping available in TiO2. Herein we report a new device geometry - one based on a donor-supply electrode (DSE) - that leads to record-performing CQD photovoltaic devices. Only by employing this new charge-extracting approach do we deepen the depletion region in the CQD solid and thereby extract notably more photocarriers, the key element in achieving record photocurrent and device performance. With the use of optoelectronic modeling corroborated by experiment, we develop the guidelines for building a superior CQD solar cell based on the DSE concept. We confirm that using a shallow-work-function terminal electrode is essential to producing improved charge extraction and enhanced performance. © 2013 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC); Organic Electronics and Photovoltaics Group
Publisher:
American Chemical Society (ACS)
Journal:
ACS Nano
Issue Date:
23-Jul-2013
DOI:
10.1021/nn401918d
PubMed ID:
23738495
Type:
Article
ISSN:
19360851
Sponsors:
This publication is based in part on 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. The authors would like to acknowledge O. Voznyy for XPS measurements and analysis. A. J. Labelle would like to acknowledge an OGS scholarship. M. M. Adachi was supported by a MITACS fellowship. X. Lan would like to acknowledge a scholarship from the China Scholarship Council (CSC). The authors would like to acknowledge the assistance of E. Palmiano, R. Wolowiec, and D. Kopilovic.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMaraghechi, Pouyaen
dc.contributor.authorLabelle, André J.en
dc.contributor.authorKirmani, Ahmad R.en
dc.contributor.authorLan, Xinzhengen
dc.contributor.authorAdachi, Michaelen
dc.contributor.authorThon, Susannaen
dc.contributor.authorHoogland, Sjoerd H.en
dc.contributor.authorLee, Annaen
dc.contributor.authorNing, Zhijunen
dc.contributor.authorFischer, Armin H.en
dc.contributor.authorAmassian, Aramen
dc.contributor.authorSargent, E. H.en
dc.date.accessioned2015-08-03T11:13:34Zen
dc.date.available2015-08-03T11:13:34Zen
dc.date.issued2013-07-23en
dc.identifier.issn19360851en
dc.identifier.pmid23738495en
dc.identifier.doi10.1021/nn401918den
dc.identifier.urihttp://hdl.handle.net/10754/562871en
dc.description.abstractColloidal quantum dot (CQD) solar cells combine solution-processability with quantum-size-effect tunability for low-cost harvesting of the sun's broad visible and infrared spectrum. The highest-performing colloidal quantum dot solar cells have, to date, relied on a depleted-heterojunction architecture in which an n-type transparent metal oxide such as TiO2 induces a depletion region in the p-type CQD solid. These devices have, until now, been limited by a modest depletion region depth produced in the CQD solid owing to limitations in the doping available in TiO2. Herein we report a new device geometry - one based on a donor-supply electrode (DSE) - that leads to record-performing CQD photovoltaic devices. Only by employing this new charge-extracting approach do we deepen the depletion region in the CQD solid and thereby extract notably more photocarriers, the key element in achieving record photocurrent and device performance. With the use of optoelectronic modeling corroborated by experiment, we develop the guidelines for building a superior CQD solar cell based on the DSE concept. We confirm that using a shallow-work-function terminal electrode is essential to producing improved charge extraction and enhanced performance. © 2013 American Chemical Society.en
dc.description.sponsorshipThis publication is based in part on 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. The authors would like to acknowledge O. Voznyy for XPS measurements and analysis. A. J. Labelle would like to acknowledge an OGS scholarship. M. M. Adachi was supported by a MITACS fellowship. X. Lan would like to acknowledge a scholarship from the China Scholarship Council (CSC). The authors would like to acknowledge the assistance of E. Palmiano, R. Wolowiec, and D. Kopilovic.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectatomic layer depositionen
dc.subjectcharge-transfer dopingen
dc.subjectcolloidal quantum doten
dc.subjectdonor-supply electrodeen
dc.subjectphotovoltaicsen
dc.subjectsolar cellsen
dc.titleThe donor-supply electrode enhances performance in colloidal quantum dot solar cellsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentOrganic Electronics and Photovoltaics Groupen
dc.identifier.journalACS Nanoen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto, Toronto, ON M5S 3G4, Canadaen
dc.contributor.institutionSchool of Materials Science and Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui Province 230009, Chinaen
kaust.authorAmassian, Aramen
kaust.authorKirmani, Ahmad R.en

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