Passivation Using Molecular Halides Increases Quantum Dot Solar Cell Performance

Lan, Xinzheng; Voznyy, Oleksandr; Kiani, Amirreza; García de Arquer, F. Pelayo; Abbas, Abdullah Saud; Kim, Gi-Hwan; Liu, Mengxia; Yang, Zhenyu; Walters, Grant; Xu, Jixian; Yuan, Mingjian; Ning, Zhijun; Fan, Fengjia; Kanjanaboos, Pongsakorn; Kramer, Illan J.; Zhitomirsky, David; Lee, Philip; Perelgut, Alexander; Hoogland, Sjoerd; Sargent, Edward H.

Type

Article

KAUST Grant Number

KUS-11-009-21

Date

2015-11-18

Online Publication Date

2015-11-18

Print Publication Date

2016-01

Permanent link to this record

http://hdl.handle.net/10754/599149

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Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Here we report a solution-based passivation scheme is developed featuring the use of molecular iodine and PbS colloidal quantum dots (CQDs). The improved passivation translates into a longer carrier diffusion length in the solid film. This allows thicker solar-cell devices to be built while preserving efficient charge collection, leading to a certified power conversion efficiency of 9.9%, which is a new record in CQD solar cells.

Citation

Lan X, Voznyy O, Kiani A, García de Arquer FP, Abbas AS, et al. (2015) Passivation Using Molecular Halides Increases Quantum Dot Solar Cell Performance. Advanced Materials 28: 299–304. Available: http://dx.doi.org/10.1002/adma.201503657.

Sponsors

X.L., O.V., A.K., and F.P.G.A. contributed equally to this work. 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 and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea govenment Ministry of Knowledge Economy (2012T100100740). The authors thank E. Palmiano, L. Levina, A. Labelle, R. Wolowiec, and D. Kopilovic for their help over the course of this study.