Improved performance and stability in quantum dot solar cells through band alignment engineering
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Bawendi_Improved performance.pdf
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Author(s)
Bawendi, Moungi G.
Chuang, Chia-Hao Marcus
Brown, Patrick Richard
Bulovic, Vladimir
Date Issued
May 2014
Journal
Nature Materials
Publisher
Nature Publishing Group
Citation
Chuang, Chia-Hao M., Patrick R. Brown, Vladimir Bulovic, and Moungi G. Bawendi. “Improved Performance and Stability in Quantum Dot Solar Cells through Band Alignment Engineering.” Nature Materials 13, no. 8 (May 25, 2014): 796–801.
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Author's final manuscript
Abstract
Solution processing is a promising route for the realization of low-cost, large-area, flexible and lightweight photovoltaic devices with short energy payback time and high specific power. However, solar cells based on solution-processed organic, inorganic and hybrid materials reported thus far generally suffer from poor air stability, require an inert-atmosphere processing environment or necessitate high-temperature processing [superscript 1], all of which increase manufacturing complexities and costs. Simultaneously fulfilling the goals of high efficiency, low-temperature fabrication conditions and good atmospheric stability remains a major technical challenge, which may be addressed, as we demonstrate here, with the development of room-temperature solution-processed [ZnO over PbS] quantum dot solar cells. By engineering the band alignment of the quantum dot layers through the use of different ligand treatments, a certified efficiency of 8.55% has been reached. Furthermore, the performance of unencapsulated devices remains unchanged for over 150 days of storage in air. This material system introduces a new approach towards the goal of high-performance air-stable solar cells compatible with simple solution processes and deposition on flexible substrates.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. School of Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/nmat3984
