O. Gomezdaza et al., HIGHLY PHOTOSENSITIVE CDSE COATINGS BY SCREEN PRINTING AND SINTERING TECHNIQUE, Applied physics letters, 68(14), 1996, pp. 1987-1989
CdSe powder precipitated from a chemical bath was screen printed on gl
ass substrates using ZnCl2 as flux, with flux to powder ratio (FPR) va
rying in the range of 0.1 to 0.5 by weight, and propylene glycol as bi
nder. After a subsequent sintering in air for 1 h at 450 degrees C, th
e screen printed coatings showed a photocurrent to darkcurrent ratio o
f similar to 10(8) under tungsten halogen illumination of 2000 W m(-2)
. X-ray diffraction studies showed that sintering causes the conversio
n of the ZnCl2 flux into hexagonal phase ZnO which would hh the void a
mong the CdSe particles. The optimum FPR and the sintering temperature
to achieve maximum photosensitivity in the coatings are presented. Th
e coatings may be used in the development of highly photosensitive lig
ht dependent resistors. (C) 1996 American Institute of Physics.