Hydrothermal Synthesis of Aqueous-Soluble Copper Indium Sulfide Nanocrystals and Their Use in Quantum Dot Sensitized Solar Cells

A facile hydrothermal method to synthesize water-soluble copper indium sulfide (CIS) nanocrystals (NCs) at 150 °C is presented. The obtained samples exhibited three distinct photoluminescence peaks in the red, green and blue spectral regions, corresponding to three size fractions, which could be sep...

Full description

Saved in:
Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-07, Vol.10 (7), p.1252
Main Authors: Santos, Calink I. L., S. Machado, Wagner, Wegner, Karl David, Gontijo, Leiriana A. P., Bettini, Jefferson, Schiavon, Marco A., Reiss, Peter, Aldakov, Dmitry
Format: Article
Language:English
Subjects:
aqueous quantum dots
chalcopyrite
Chemical Sciences
Chloride
CIS
Condensed Matter
Copper
Crystals
Efficiency
Energy conversion efficiency
fractionation
Indium
Inorganic chemistry
Ligands
Material chemistry
Materials Science
Microscopy
Nanocrystals
Other
Photoelectric effect
Photoelectric emission
Photoluminescence
Photons
Photovoltaic cells
Physics
quantum dot sensitized solar cells
Quantum dots
Software
Solar cells
Spectrum analysis
Sulfides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A facile hydrothermal method to synthesize water-soluble copper indium sulfide (CIS) nanocrystals (NCs) at 150 °C is presented. The obtained samples exhibited three distinct photoluminescence peaks in the red, green and blue spectral regions, corresponding to three size fractions, which could be separated by means of size-selective precipitation. While the red and green emitting fractions consist of 4.5 and 2.5 nm CIS NCs, the blue fraction was identified as in situ formed carbon nanodots showing excitation wavelength dependent emission. When used as light absorbers in quantum dot sensitized solar cells, the individual green and red fractions yielded power conversion efficiencies of 2.9% and 2.6%, respectively. With the unfractionated samples, the efficiency values approaching 5% were obtained. This improvement was mainly due to a significantly enhanced photocurrent arising from complementary panchromatic absorption.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10071252