Charge-extraction strategies for colloidal quantum dot photovoltaics

Handle URI:
http://hdl.handle.net/10754/563399
Title:
Charge-extraction strategies for colloidal quantum dot photovoltaics
Authors:
Lan, Xinzheng; Masala, Silvia; Sargent, E. H.
Abstract:
The solar-power conversion efficiencies of colloidal quantum dot solar cells have advanced from sub-1% reported in 2005 to a record value of 8.5% in 2013. Much focus has deservedly been placed on densifying, passivating and crosslinking the colloidal quantum dot solid. Here we review progress in improving charge extraction, achieved by engineering the composition and structure of the electrode materials that contact the colloidal quantum dot film. New classes of structured electrodes have been developed and integrated to form bulk heterojunction devices that enhance photocharge extraction. Control over band offsets, doping and interfacial trap state densities have been essential for achieving improved electrical communication with colloidal quantum dot solids. Quantum junction devices that not only tune the optical absorption spectrum, but also provide inherently matched bands across the interface between p-and n-materials, have proven that charge separation can occur efficiently across an all-quantum-tuned rectifying junction. © 2014 Macmillan Publishers Limited.
KAUST Department:
Solar and Photovoltaic Engineering Research Center (SPERC); Materials Science and Engineering Program
Publisher:
Springer Nature
Journal:
Nature Materials
Issue Date:
20-Feb-2014
DOI:
10.1038/nmat3816
Type:
Article
ISSN:
14761122
Sponsors:
The authors acknowledge J. Xu for his contributions to the figures. 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), the Ontario Research Fund Research Excellence Program, the Natural Sciences and Engineering Research Council (NSERC) of Canada, and Angstrom Engineering and Innovative Technology. X. L. would like to acknowledge a scholarship from the China Scholarship Council (CSC).
Appears in Collections:
Articles; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLan, Xinzhengen
dc.contributor.authorMasala, Silviaen
dc.contributor.authorSargent, E. H.en
dc.date.accessioned2015-08-03T11:47:36Zen
dc.date.available2015-08-03T11:47:36Zen
dc.date.issued2014-02-20en
dc.identifier.issn14761122en
dc.identifier.doi10.1038/nmat3816en
dc.identifier.urihttp://hdl.handle.net/10754/563399en
dc.description.abstractThe solar-power conversion efficiencies of colloidal quantum dot solar cells have advanced from sub-1% reported in 2005 to a record value of 8.5% in 2013. Much focus has deservedly been placed on densifying, passivating and crosslinking the colloidal quantum dot solid. Here we review progress in improving charge extraction, achieved by engineering the composition and structure of the electrode materials that contact the colloidal quantum dot film. New classes of structured electrodes have been developed and integrated to form bulk heterojunction devices that enhance photocharge extraction. Control over band offsets, doping and interfacial trap state densities have been essential for achieving improved electrical communication with colloidal quantum dot solids. Quantum junction devices that not only tune the optical absorption spectrum, but also provide inherently matched bands across the interface between p-and n-materials, have proven that charge separation can occur efficiently across an all-quantum-tuned rectifying junction. © 2014 Macmillan Publishers Limited.en
dc.description.sponsorshipThe authors acknowledge J. Xu for his contributions to the figures. 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), the Ontario Research Fund Research Excellence Program, the Natural Sciences and Engineering Research Council (NSERC) of Canada, and Angstrom Engineering and Innovative Technology. X. L. would like to acknowledge a scholarship from the China Scholarship Council (CSC).en
dc.publisherSpringer Natureen
dc.titleCharge-extraction strategies for colloidal quantum dot photovoltaicsen
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalNature Materialsen
dc.contributor.institutionUniv Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canadaen
dc.contributor.institutionHefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R Chinaen
kaust.authorMasala, Silviaen
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