Graded Doping for Enhanced Colloidal Quantum Dot Photovoltaics

Zhijun Ning, David Zhitomirsky, Valerio Adinolfi, Brandon Sutherland, Jixian Xu, Oleksandr Voznyy, Pouya Maraghechi, Xinzheng Lan, Sjoerd Hoogland, Yuan Ren, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

163 Scopus citations


A novel approach to improving all-inorganic colloidal quantum dot (CQD) homojunction solar cells by engineering the doping spatial profile to produce a doping gradient within the n-type absorber is presented. The doping gradient greatly improves carrier collection and enhances the voltages attainable by the device, leading to a 1 power point power conversion efficiency (PCE) improvement over previous inorganic CQD solar cells. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)1719-1723
Number of pages5
JournalAdvanced Materials
Issue number12
StatePublished - Feb 5 2013
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-11-009-21
Acknowledgements: 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. D.Z. acknowledges support from the NSERC CGS D scholarship. We thank Angstrom Engineering, Inc. and Innovative Technology, Inc. for useful discussions regarding material deposition methods and control of the glovebox environment, respectively. The authors thank: Larissa Levina for the assistance of quantum dots synthesis, Xihua Wang, Susanna Thon for helpful discussion; Andre Labelle and Daniel Paz-Soldan for measurement asisstance; and E. Palmiano, R. Wolowiec, and D. Kopilovic for their help during the course of study.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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