SnSe nanocrystals: synthesis, structure, optical properties, and surface chemistry.
The colloidal synthesis of SnSe nanoparticles is accomplished through the injection of bis[bis(trimethylsilyl)amino]tin(II) into hot trioctylphosphine:selenium in the presence of oleylamine. Through the manipulation of reaction temperature particles are grown with the average diameter reliably tuned to 4-10 nm. Quantum confinement is examined by establishing a relationship between particle size and band gap while the in depth growth dynamics are illuminated through UV-vis-NIR spectroscopy. Surface chemistry effects are explored, including the demonstration of useful ligand exchanges and the development of routes toward anisotropic particle growth. Finally, transient current-voltage properties of SnSe nanocrystal films in the dark and light are examined.
Baumgardner
William J
WJ
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA. wjb87@cornell.edu
Choi
Joshua J
JJ
Lim
Yee-Fun
YF
Hanrath
Tobias
T