Abstracts Book - IMRC 2018

• SA6-P087
CHARACTERIZATION AND GROWTH OF DOPED-PBS IN SITU WITH
Bi 3+ , Cd 2+ AND Er 3+ IONS BY CHEMICAL BATH
Miguel Hernandez Hernandez 1 , Oscar Portillo Moreno 2 , Marcial Zamora Tototzintle 3 , Vladimir
Maldonado Guzman 4
1
Benemerita Universidad Autonoma de Puebla, Físico Matemáticas, Mexico. 2 Benemerita
Universidad Autonoma de Puebla, Físico Matemáticas, laboratorio de ciencia de materiales,
Mexico. 3 Benemerita Universidad Autonoma de Puebla, Ciencias Quimicas, química general,
Mexico. 4 Benemerita Universidad Autonoma de Puebla, Ingenieria Química, Mexico.
The growth of PbS nanocrystals doped in situ simultaneously with Er 3+ -Cd 2+ -Bi 3+
solutions at different proportions growth by chemical bath, was examined with
the aim of investigating the morphological, optical and structural changes of the
nanocrystals. Fourier transform infrared spectroscopy (FTIR) spectra showed an
absorption band located at ~3356 cm -1 attributed to stretching of -OH groups
and a sharp stretching band at ~1932 cm -1 assigned to vibration mode of ions.
X-ray diffraction (XRD) patterns exhibited a cubic phase in all films and the grain
size of the undoped samples was ~6.57 nm, whereas for doped films was ~6.40-
4.16 nm. Absorbance spectra of PbS films exhibited five absorption bands
located at ~346, ~585, ~615, ~670 and ~775 nm due to strong confinement
effect. Small absorption band located at ~446 nm, corresponding to 4 F7/2→ 4 I5/2
(4f→4f transitions of Er 3+ ions) was also observed.
Keywords: chemical bath, PbS, Bi, Cd, Er
Presenting authors email: miguelhh2018@hotmail.com