000			02998cam a2200337 a 4500
003			EG-GiCUC
005			20250223032245.0
008			190415s2018 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.24.12.M.Sc.2018.So.E
100	0		_aSomaia Hassan Ali Mohamed
245	1	0	_aEffect of laser sensitization on the properties of PbS thin films prepared by chemical bath deposition / _cSomaia Hassan Ali Mohamed ; Supervised Gamal Abdelfattah Ali , Randa Saad Ali
246	1	5	_aتأثير بالليزر على خواص اغشية رقيقه من كبريتيد الرصاص المحضره بواسطه حمام الترسيب الكيميائي
260			_aCairo : _bSomaia Hassan Ali Mohamed , _c2018
300			_a118 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced Sciences - Department of Laser Sciences and Interactions
520			_aPbS thin films were deposited on glass substrates using the simplest and low cost chemical bath deposition technique (CBD). Three different lead sources namely lead nitrate, lead acetate and lead chloride have been used for the synthesis with thiourea as sulphur source and sodium hydroxide as a base medium. The effect of change lead sources on structural, surface morphological optical and electrical properties was discussed. According to X-ray diffraction studies, all the films were polycrystalline with face centered cubic structure. The average crystallite sizes were found to be in the range 40-64 nm, Thus, XRD studies reveal that the films deposited by CBD were formed from monocrystalline PbS. AFM images show different morphology for films, The crystalline grains were relatively good, grain sizes were uniformly distributed on the surface of the substrate for film prepared using lead nitrate as a lead source, whereas for samples prepared using lead acetate and lead chloride as a lead sources grain sizes were non uniformly distributed on the surface of the substrate .The SEM photographs showed diverse morphology. The optical band gap is found to be very sensitive to the metal sources used. The direct band gap energy values obtained are in the range of 1.50{u2013}1.77 eV. The Samples prepared using nitrate as metal source from the properties are found to be the best metal source for preparing PbS thin films .For higher thickness the reaction was repeated and the thickness was doubled. The reaction was repeated three times and get four different thicknesses 300,600,900 and 1200nm
530			_aIssued also as CD
653		4	_aChemical bath deposition
653		4	_aLaser sensitization
653		4	_aPbS thin films
700	0		_aGamal Abdelfattah Ali , _eSupervisor
700	0		_aRanda Saad Ali, _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c71473 _d71473