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Zhijun Ning, Yuan Ren, Sjoerd Hoogland, Oleksandr Voznyy, Larissa Levina, Philipp Stadler, Xinzheng Lan, David Zhitomirsky and Edward H. Sargent All-Inorganic Colloidal Quantum Dot Photovoltaics Employing Solution-Phase Halide Passivation Advanced Materials 24

Version of Record online: 12 SEP 2012 | DOI: 10.1002/adma.201202942

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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.

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