DSpace at KIST: High-Performance Quantum-Dot Solids via Elemental Sulfur Synthesis

High-Performance Quantum-Dot Solids via Elemental Sulfur Synthesis

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

Abstract: 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%.

Keywords: SOLAR-CELLS; PBS NANOCRYSTALS; PHOTOVOLTAICS; RECOMBINATION; PHOTOCURRENT; PASSIVATION; DIFFUSION; EMISSION; SOLAR-CELLS; PBS NANOCRYSTALS; PHOTOVOLTAICS; RECOMBINATION; PHOTOCURRENT; PASSIVATION; DIFFUSION; EMISSION; colloidal quantum dots; depleted heterojunctions; PbS; photovoltaics; synthesis

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