JOURNAL OF KUFA – PHYSICS, Vol. 10, No.1 (2018) Saleem Azara Hussain Ali Abdul-Hussein 35 Study of the Structural and optical properties of Pure and Sn doped Polyaniline hydrochloride polymer (PANI) thin films prepared by Spin coating method Saleem Azara Hussain Ali Abdul-Hussein University of Qadisiyah, College of Education, Department of Physics Saleem.hussain@qu.edu ali275350@yahoo.com Abstract In this study the structural and optical properties of pure and Sn doped films polyanilinehydrochloride (PANI) doped by Tin (Sn) with volumetric percentages (3, 6, and 9)%, which prepared by using the spin coating method on substrates of the glass at room temperature. The structural properties of the prepared films were studied by x-ray diffraction technique. The results illustrate amorphous structure .The atomic force microscope (AFM) diagnosis has led the doping process to decrease in the roughness of the surface and the average rate of the square root with the variation in particle size distribution. The study of the optical properties by measuring then absorption and transmission spectra as a function of wavelength (320-910) nm to the pure and doped film of PANI, the results showed that the transmittance decreased with increasing doping due to the increase in the impurity resulted which makes attenuation in the intensity of incident light with a increasing of absorption. The results also showed that the polymer has an indirect allowed energy gap and it decrease with increasing doping because of the doping levels (Sn) inside the optical energy gap. http://dx.doi.org/10.31257/2018/JKP/100107 Key Words: Polyaniline hydrochloride films, Structural and optical properties, Spin coating. ( كلورايذيلين هيذروغشيت بوليمر أنبظريت لركيبيت وال الخواص الت دراستPANI المشوبت النقيت و) بالقظذير والمحضرة بطريقتء بالتذويرطل ال سليم عزاره حسين عبذ الحسين رخيض عليربيت /قسم التقادسيت/ كليتمعت ال جازياء الفيخلطت الاستم في هزا اىبحث دس حىخظائض ات واىبظشيت اىخشميبي لغشيتىسايذذسومي هييهي أويىي بىPANI بت باىمشىقيت واىى اى( قظذيشSn ) ىسب وباى اىحجميت3,6,9)% ) محضشة بخقىيت اىىطلء باىخذويش ا( spin coating ) عيسضياث ااج مه اىضج بذسجت حشاسة اىغشفت. ح مىبت عه طشيققيت واىمشىيت اىمحضشة اىميبيت ىلغشاص اىخشخىاست اى دساست دسسيىيت،دالشعت اى حيىىخائج أر أظهشث اى ظهىس اىخشميبعشىائي اىيت اىمحضشة ىلغش. خذامزىل حم اسخ م اىزسيتقىيخيض بمجهش اى اىخش(AFM) ىيب إىخشىيت اى فقذ أدث عميىقظان اى في مخىسظعي اىجزس اىخشبي وبيع اىحجم اىحبي حىصيه في مع حبايوت اىسطح خشىىشائبتدة اىماحسب وسب ا با حم حشخيضم .مىخظائظاىبظشيتمه المخظاطيتريت واىفافي اى طي خله قياطمىجيتاه اى مذي الطى في(320-910nm) لغشيتPANI مشىبت ،قيت واىى اىىخائجج اى حيث بيىىفاريت حقو ان اىشىائبدة وسب اىت مع صياضحت ىلمخظاطيدة وا مع صيا, ىخائجج اى وبيىً أيضا امخلكىيمشبى اىشة مباش فجىة طاقت غيشسمىحت م وشىائبياث ىىن مسخىيب ىخنخشىدة وسب اىها حقو بضيا او(Sn) قت اىبظشيتىطا داخو فجىة ا. احيتث المفتكلما ال: أغشيتيهي أويىي بىىسايذذسومي هي, ت واىبظشيت ,اص اىخشميبيخى اىىطلء باىخذويش ا.