Effect of deposition temperature on the structural and optical properties of chemically prepared nanocrystalline lead selenide thin films

• Anayara Begum,
• Amir Hussain and
• Atowar Rahman

Beilstein J. Nanotechnol. 2012, 3, 438–443, doi:10.3762/bjnano.3.50

• Anayara Begum Amir Hussain Atowar Rahman Department of Physics, Gauhati University, Guwahati-781014, Assam, India 10.3762/bjnano.3.50 Abstract Nanocrystalline lead selenide (PbSe) thin films were prepared on glass substrates by a chemical bath deposition method, using sodium selenosulfate

• crystallite size. The optical absorption spectra of the nanocrystalline PbSe films showed a blue shift, and the optical band gap (Eg) was found to increase from 1.96 to 2.10 eV with the decrease in crystallite size. Keywords: chemical bath deposition; lattice parameter; lead selenide; Nelson–Riley plot

• ; optical absorption; Introduction Lead selenide (PbSe) with its narrow band gap (Eg = 0.27 eV) [1] is an important semiconductor of the IV–VI lead chalcogenides group. PbSe has a large exciton Bohr radius (46 nm), which offers the opportunity to achieve strong size quantization at relatively large crystal