All-Inorganic Colloidal Quantum Dot Photovoltaics Employing Solution-Phase Halide Passivation

Zhijun Ning, Yuan Ren, Sjoerd Hoogland, Oleksandr Voznyy, Larissa Levina, Philipp Stadler, Xinzheng Lan, David Zhitomirsky, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

167 Scopus citations

Abstract

A new solution-phase halide passivation strategy to improve the electronic properties of colloidal quantum dot films is reported. We prove experimentally that the approach leads to an order-of-magnitude increase in mobility and a notable reduction in trap state density. We build solar cells having the highest efficiency (6.6%) reported using all-inorganic colloidal quantum dots. The improved photocurrent results from increased efficiency of collection of infrared-generated photocarriers. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)6295-6299
Number of pages5
JournalAdvanced Materials
Volume24
Issue number47
DOIs
StatePublished - Sep 12 2012
Externally publishedYes

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