Coloring Tetrahedral Semiconductors : Synthesis and Photoluminescence Enhancement of Ternary II-III2‑VI4 Colloidal Nanocrystals
Pavel, Md Riad Sarkar (Iowa State University)
Chen, Yunhua (Iowa State University)
Santhiran, Anuluxan (Iowa State University)
Gi, Eunbyeol (Iowa State University)
Ochoa-Romero, Kerly (Universitat Autònoma de Barcelona. Departament de Química)
Miller, Gordon J. (Iowa State University)
Guirado López, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)
Rossini, Aaron J. (Iowa State University)
Vela, Javier (Iowa State University)

Data:	2024
Resum:	Ternary tetrahedral II-III-VI semiconductors, where II is Zn or Cd, III In or Ga, and VI S, Se, or Te, are of interest in UV radiation detectors in medicine and space physics as well as CO photoreduction under visible light. We synthesize colloidal II-III-VI semiconductor nanocrystals from readily available precursors and ascertain their ternary nature by structural and spectroscopic methods, including 77 Se solid-state NMR spectroscopy. The pyramidally shaped nanocrystals range between 2 and 12 nm and exhibit optical gaps of 2-3. 9 eV. In the presence of excess anions on the particle surface, treatment with Lewis acidic, Z-type ligands results in better passivation and enhanced photoluminescence. Electronic structure calculations reveal the most stable, lowest energy polymorphs and coloring patterns. This work will pave the way toward more environmentally friendly, ternary semiconductors for optoelectronics and electrocatalysis.
Ajuts:	European Commission 101115182
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Crystals ; Electrical conductivity ; Nanocrystals ; Nuclear magnetic resonance spectroscopy ; Semiconductors
Publicat a:	ACS energy letters, Vol. 9, Issue 10 (September 2024) , p. 5012-5018, ISSN 2380-8195

DOI: 10.1021/acsenergylett.4c02032
PMID: 39416674

7 p, 3.5 MB

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