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Photoconducting nanocomposite films of PbS nanocrystals in insulating polystyrene
Author(s) -
Chaudhuri T. K.,
Kothari A. J.,
Tiwari D.,
Ray A.
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201228566
Subject(s) - lead sulfide , thermogravimetric analysis , nanocomposite , polystyrene , materials science , photoconductivity , transmission electron microscopy , nanocrystal , sulfide , thermal decomposition , spectroscopy , thin film , chemical engineering , analytical chemistry (journal) , nanotechnology , polymer , composite material , optoelectronics , quantum dot , chemistry , organic chemistry , metallurgy , engineering , physics , quantum mechanics
Lead sulfide (PbS)/polystyrene (PS) nanocomposite (NCP) thin films have been synthesized from solution by in situ thermolysis. PbS nanocrystals (NCs) are of 3–5 nm size as determined from Transmission Electron Microscope. The films are p‐type with dark conductivity of ∼10 −6 S cm −1 and high photoconductivity with linear current–voltage ( I – V ) characteristics. The electrical properties are explained on the basis of strong interaction between PbS and PS as revealed by infrared spectroscopy and thermogravimetric analysis (TGA).