High-Performance Quantum-Dot Solids via Elemental Sulfur Synthesis

An elemental‐sulfur‐based synthesis is reported, which, combined with processing to improve the size dispersion and passivation, results in a low‐cost high‐quality platform for small‐bandgap PbS‐CQD‐based devices. Size‐selective precipitation and cadmium chloride passivation are used to improve the...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2014-06, Vol.26 (21), p.3513-3519
Main Authors: Yuan, Mingjian, Kemp, Kyle W., Thon, Susanna M., Kim, Jin Young, Chou, Kang Wei, Amassian, Aram, Sargent, Edward H.
Format: Article
Language:English
Subjects:
colloidal quantum dots
depleted heterojunctions
Devices
Dispersions
Energy conversion efficiency
Passivation
PbS
Photovoltaic cells
photovoltaics
Precipitation
Qunatum dots
Solar cells
Synthesis
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Summary:An elemental‐sulfur‐based synthesis is reported, which, combined with processing to improve the size dispersion and passivation, results in a low‐cost high‐quality platform for small‐bandgap PbS‐CQD‐based devices. Size‐selective precipitation and cadmium chloride passivation are used to improve the power conversion efficiency of 1 eV bandgap CQD photovoltaic devices dramatically, which leads to record power conversion efficiency for a 1 eV PbS CQD solar cell of 5.4%.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201305912