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

Type
Article

Authors
Debnath, Ratan
Greiner, Mark T.
Kramer, Illan J.
Fischer, Armin
Tang, Jiang
Barkhouse, D. Aaron R.
Wang, Xihua
Levina, Larissa
Lu, Zheng-Hong
Sargent, Edward H.

KAUST Grant Number
KUS-I1-009-21

Online Publication Date
2010-07-15

Print Publication Date
2010-07-12

Date
2010-07-15

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. © 2010 American Institute of Physics.

Citation
Debnath R, Greiner MT, Kramer IJ, Fischer A, Tang J, et al. (2010) Depleted-heterojunction colloidal quantum dot photovoltaics employing low-cost electrical contacts. Applied Physics Letters 97: 023109. Available: http://dx.doi.org/10.1063/1.3463037.

Acknowledgements
R. Debnath would like to acknowledge the financial support through e8 scholarship. This publication was based on work supported in part by Award No. KUS-I1-009-21, made by King Abdullah University of Science and Technology (KAUST).

Publisher
AIP Publishing

Journal
Applied Physics Letters

DOI
10.1063/1.3463037

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