Removing Cadmium Impurities from Cation-Exchange-Derived CuInSe2/CuInS2 Nanorods for Enhanced Infrared Emission and Photodetection
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F24%3A10254876" target="_blank" >RIV/61989100:27740/24:10254876 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202400942" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202400942</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adfm.202400942" target="_blank" >10.1002/adfm.202400942</a>
Alternative languages
Result language
angličtina
Original language name
Removing Cadmium Impurities from Cation-Exchange-Derived CuInSe2/CuInS2 Nanorods for Enhanced Infrared Emission and Photodetection
Original language description
Metal chalcogenide nanocrystals with variable composition and shape can conveniently be produced using cation exchange synthesis; however, the presence of cation-containing ligands inherited from the starting material often results in contamination of the final product. To address this issue, a two-step ligand replacement strategy is developed to fabricate CuInSe2/CuInS2 nanorods from CdSe/CdS nanorods via removal of Cd-phosphonates from an intermediate Cu2-xSe/Cu2-xS phase used in the cation exchange conversion. This synthetic approach furnishes CuInSe2/CuInS2 nanorods with cadmium content below 1 at.%, and high photoluminescence quantum yields reaching 40% in the near-infrared spectral range. Transient absorption studies reveal that the band alignment in the CuInSe2/CuInS2 heterostructure features a quasi-type II character, with an electron localized in the core and a hole wavefunction spread over the entire nanorod. The efficient passivation of the core and the reduced Cd content leads to excitonic emission with full width at half maximum down to 110 meV, superimposed with a broad emission band from copper-induced defects. Field-effect transistors based on cadmium-free CuInSe2/CuInS2 nanorods show two orders of magnitude lower noise current density compared with the cadmium-rich devices. The responsivity and specific detectivity of these devices reach 230 mA W-1 and 10(8) Jones, respectively, under near-infrared excitation at room temperature.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
—
Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Functional Materials
ISSN
1616-301X
e-ISSN
1616-3028
Volume of the periodical
34
Issue of the periodical within the volume
34
Country of publishing house
DE - GERMANY
Number of pages
12
Pages from-to
—
UT code for WoS article
001184056600001
EID of the result in the Scopus database
2-s2.0-85187535229