TITLE

Depleted-heterojunction colloidal quantum dot photovoltaics employing low-cost electrical contacts

AUTHOR(S)
Debnath, Ratan; Greiner, Mark T.; Kramer, Illan J.; Fischer, Armin; Jiang Tang; Barkhouse, D. Aaron R.; Xihua Wang; Levina, Larissa; Zheng-Hong Lu; Sargent, Edward H.
PUB. DATE
July 2010
SOURCE
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
With an aim to reduce the cost of depleted-heterojunction colloidal quantum dot solar cells, we describe herein a strategy that replaces costly Au with a low-cost Ni-based Ohmic contact. The resultant devices achieve 3.5% Air Mass 1.5 power conversion efficiency. Only by incorporating a 1.2-nm-thick LiF layer between the PbS quantum dot film and Ni, we were able to prevent undesired reactions and degradation at the metal-semiconductor interface.
ACCESSION #
52289387

 

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