The structure and optical properties of CdSe:Cu Thin Films
A polycrystalline CdSe thin films doped with (5wt%) of Cu was fabricated using vacuum evaporation technique in the substrate temperature range(Ts=RT-250)oC on glass substrates of the thickness(0.8?m). The structure of these films are determined by X-ray diffraction (XRD). The X-ray diffraction stu...
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University of Baghdad, College of Science for Women
2009-03-01
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| Series: | مجلة بغداد للعلوم |
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| Online Access: | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/966 |
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| description | A polycrystalline CdSe thin films doped with (5wt%) of Cu was fabricated using vacuum evaporation technique in the substrate temperature range(Ts=RT-250)oC on glass substrates of the thickness(0.8?m). The structure of these films are determined by X-ray diffraction (XRD). The X-ray diffraction studies shows that the structure is polycrystalline with hexagonal structure, and there are strong peaks at the direction (200) at (Ts=RT-150) oC, while at higher substrate temperature(Ts=150-250) oC the structure is single crystal. The optical properties as a function of Ts were studied. The absorption, transmission, and reflection has been studied, The optical energy gap (Eg)increases with increase of substrate temperature from (1.65-1.84)eV due to improvement in the structure. The amorphousity of the films decreases with increasing Ts. The films have direct energy gap and the absorption edge was shift slightly towards smaller wavelength for CdSe:Cu thin film with increase of substrate temperature.it was found that the absorption coefficient was decreased with increasing of substrate temperature due to increases the value of(Eg). The CdSe:Cu films showed absorption coefficient in the range (0.94 x104-0.42x104)cm-1at Ts=RT-250 oC. Also the density of state decreases with increasing of substrate temperatures from (0.20-0.07)eV, it is possibly due to the recrystallization by the heating substrate temperatures.. Also the extinction coefficient, refractive index and dielectric constant have been studied. |
| format | Article |
| id | doaj-art-12b30d3bb00f4e7581ad848fc77d7801 |
| institution | Kabale University |
| issn | 2078-8665 2411-7986 |
| language | English |
| publishDate | 2009-03-01 |
| publisher | University of Baghdad, College of Science for Women |
| record_format | Article |
| series | مجلة بغداد للعلوم |
| spelling | doaj-art-12b30d3bb00f4e7581ad848fc77d78012025-08-20T03:58:07ZengUniversity of Baghdad, College of Science for Womenمجلة بغداد للعلوم2078-86652411-79862009-03-016110.21123/bsj.6.1.141-149The structure and optical properties of CdSe:Cu Thin FilmsBaghdad Science JournalA polycrystalline CdSe thin films doped with (5wt%) of Cu was fabricated using vacuum evaporation technique in the substrate temperature range(Ts=RT-250)oC on glass substrates of the thickness(0.8?m). The structure of these films are determined by X-ray diffraction (XRD). The X-ray diffraction studies shows that the structure is polycrystalline with hexagonal structure, and there are strong peaks at the direction (200) at (Ts=RT-150) oC, while at higher substrate temperature(Ts=150-250) oC the structure is single crystal. The optical properties as a function of Ts were studied. The absorption, transmission, and reflection has been studied, The optical energy gap (Eg)increases with increase of substrate temperature from (1.65-1.84)eV due to improvement in the structure. The amorphousity of the films decreases with increasing Ts. The films have direct energy gap and the absorption edge was shift slightly towards smaller wavelength for CdSe:Cu thin film with increase of substrate temperature.it was found that the absorption coefficient was decreased with increasing of substrate temperature due to increases the value of(Eg). The CdSe:Cu films showed absorption coefficient in the range (0.94 x104-0.42x104)cm-1at Ts=RT-250 oC. Also the density of state decreases with increasing of substrate temperatures from (0.20-0.07)eV, it is possibly due to the recrystallization by the heating substrate temperatures.. Also the extinction coefficient, refractive index and dielectric constant have been studied.http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/966"CdSe thin films, optical properties, structure properties poly crystalline CdSe." |
| spellingShingle | Baghdad Science Journal The structure and optical properties of CdSe:Cu Thin Films مجلة بغداد للعلوم "CdSe thin films, optical properties, structure properties poly crystalline CdSe." |
| title | The structure and optical properties of CdSe:Cu Thin Films |
| title_full | The structure and optical properties of CdSe:Cu Thin Films |
| title_fullStr | The structure and optical properties of CdSe:Cu Thin Films |
| title_full_unstemmed | The structure and optical properties of CdSe:Cu Thin Films |
| title_short | The structure and optical properties of CdSe:Cu Thin Films |
| title_sort | structure and optical properties of cdse cu thin films |
| topic | "CdSe thin films, optical properties, structure properties poly crystalline CdSe." |
| url | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/966 |
| work_keys_str_mv | AT baghdadsciencejournal thestructureandopticalpropertiesofcdsecuthinfilms AT baghdadsciencejournal structureandopticalpropertiesofcdsecuthinfilms |