Passivation Using Molecular Halides Increases Quantum Dot Solar Cell Performance

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

Research output: Contribution to journalArticlepeer-review

300 Scopus citations


© 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.
Original languageEnglish (US)
Pages (from-to)299-304
Number of pages6
JournalAdvanced Materials
Issue number2
StatePublished - Nov 18 2015
Externally publishedYes


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