High‐Performance Quantum‐Dot Solids via Elemental Sulfur Synthesis | Zendy

Yuan Mingjian | Zendy; Kemp Kyle W. | Zendy; Thon Susanna M. | Zendy; Kim Jin Young | Zendy; Chou Kang Wei | Zendy; Amassian Aram | Zendy; Sargent Edward H. | Zendy

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High‐Performance Quantum‐Dot Solids via Elemental Sulfur Synthesis

Author(s) -

Yuan Mingjian,

Kemp Kyle W.,

Thon Susanna M.,

Kim Jin Young,

Chou Kang Wei,

Amassian Aram,

Sargent Edward H.

Publication year - 2014

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.201305912

Subject(s) - passivation , materials science , energy conversion efficiency , photovoltaic system , band gap , sulfur , quantum dot , dispersion (optics) , solar cell , optoelectronics , precipitation , nanotechnology , optics , metallurgy , ecology , physics , layer (electronics) , biology , meteorology

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%.

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