Premium
Germanium Xanthates: Versatile Precursors for Photo Responsive Germanium Sulfide Nanostructures
Author(s) -
Shah Alpa Y.,
Kedarnath G.,
Tyagi Adish,
Betty C. A.,
Jain Vimal K.,
Vishwanadh B.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700486
Subject(s) - germanium , materials science , nanoparticle , band gap , nanostructure , amorphous solid , sulfide , thermal decomposition , quantum dot , nanotechnology , decomposition , photochemistry , optoelectronics , chemistry , crystallography , organic chemistry , silicon , metallurgy
A convenient synthesis of amorphous and crystalline germanium sulfide nanoparticles and nanosheets by thermolysis of germanium xanthates, [Ge(S 2 COR′) 4 ] (R′=Et or Pr i ) and [Bu n 2 Ge(S 2 COPr i ) 2 ] as single source molecular precursors, has been reported. The solid state diffuse reflectance spectra showed reasonable blue shifts in the direct band gap (1.75‐2.24 eV) of nanostructures relative to its bulk counterpart (1.54‐1.65 eV) indicating quantum confinement of GeS nanoparticles. Current‐Voltage (I−V) characteristics and photo response properties of the nanosheets and nanoparticles have been evaluated. The tuning of band gap and morphology from sphere to sheet has been demonstrated by varying the reaction duration.