GÜNEŞ PİLİ UYGULAMALARI İÇİN CdS İNCE FİLMLERİN OPTİK ÖZELLİKLERİNİN MALTOZ KATKISIYLA GELİŞTİRİLMESİ

Kimyasal banyo depolama (CBD) yöntemi kullanılarak nano yapılı kadmiyum sülfit (CdS) ince filmler cam yüzeyler üzerinde üretilmiştir. Farklı konsantrasyonlardaki maltoz (C12H22O11,α-D-Glukopiranozil-(1→4)-α-D-Glukopiranoz), büyüme çözeltilerinde bir katkı maddesi olarak kullanılmıştır. Maltozun CdS ince filmlerin yapısal, morfolojik ve optik özellikleri üzerindeki etkisi X-Işını kırınımı (XRD), taramalı elektron mikroskobu (SEM) ve UV-Vis spektrofotometre kullanılarak incelenmiştir. Analizler, filmlerin kristal büyüklüklerinin maltoz konsantrasyonunun artmasıyla azaldığını ve filmlerin homojenliğinin maltoz konsantrasyonunun aratmasıyla arttığını göstermiştir. Ayrıca, hem optik yasak enerji bant aralığı hem de optik geçirgenlik değerleri maltoz konsantrasyonunun artmasıyla artmıştır. Bu sonuçlar büyüme çözeltisi içindeki maltoz konsantrasyonunun artmasının nano yapılı CdS filmlerin yüzey morfolojilerini, kristal yapılarını, yasak enerji bant aralığını ve optik geçirgenlik değerlerini dikkat çekici bir şekilde etkilediğini göstermiştir.

Anahtar Kelimeler:

CdS, maltoz, optik özellikler, kimyasal banyo depolama

Improvement of Optical Properties of CdS Thin Films by Maltose Additive for Solar Cell Applications

Nanostructured cadmium sulfide (CdS) thin films were fabricated on glass substrates by using chemical bath deposition (CBD) method. Different concentrations of maltose (C12H22O11,α-D-Glukopiranozil-(1→4)-α-D-Glukopiranoz) were used as an additive in the growth solutions. The influence of maltose on structural, morphological and optical properties of CdS films has been investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis.) analysis. The analysis showed that the values of crystallite size of the films decreases with increasing maltose concentration in the bath and the uniformity of the films increases with increasing maltose concentrations. Also, both the optical band gap value and transmission rate increases with increasing maltose concentration. These results show that increasing maltose concentration in the growth solution remarkably affects the surface morphology, crystal structure, band gap and transmittance of the nanostructured CdS films.

Keywords:

CdS, maltose, optical properties, chemical bath deposition,

PDF

___

Alamgir, Khan, W., Ahmad, S., Hassan, M.M., Naqvi, A.H. (2014) Structural phase analysis, band gap tuning and fluorescence properties of Co doped TiO2 nanoparticles, Optical Materials, 38, 278-285. doi: 10.1016/j.optmat.2014.10.054
Attia, M.S., Zoulghena, H., and. Abdel-Mottaleb, M.S.A. (2014) A new nano-optical sensor thin film cadmium sulfide doped in sol–gel matrix for assessment of α-amylase activity in human saliva, Analyst, 139, 793-800. doi:10.1039/c3an01645e
Butt, S., Shah, N.A., Nazir, A., Ali, Z., Maqsood, A. (2014) Influence of film thickness and In-doping on physical properties of CdS thin films, Journal of Alloys and Compounds, 587, 582-587. doi: 10.1016/j.jallcom.2013.10.221
Han, J., Spanheimer, C., Haindl, G., Fu, G., Krishnakumar, V., Schaffner, J., Fan, C., Zhao, K., Klein, A., Jaegermann, W. (2011) Optimized chemical bath deposited CdS layers for the improvement of CdTe solar cells, Solar Energy Materials and Solar Cells, 95, 816-820. doi:10.1016/j.solmat.2010.10.027
He, Z., Zhao, G., Weng, W., Du, P., Shen, G., Han, G. (2005) The difference between the transverse and in-plane resistivity of vacuum evaporated cadmium sulfide (CdS) thin films, Vacuum, 79, 14-18. doi:10.1016/j.vacuum.2005.01.004
Huang, L., Wei, Z.L., Zhang, F.M., Wu, X.S. (2015) Electronic and optical properties of CdS films deposited by evaporation, Journal of Alloys and Compounds, 648, 591-594. doi: 10.1016/j.jallcom.2015.07.041
Ibrahim, S.G., Ubale, A.U. (2014) Structural, electrical and optical properties of nanostructured Cd1_xFexS thin films deposited by chemical spray pyrolysis technique, Journal of Molecular Structure, 1076, 291-298. doi: 10.1016/j.molstruc.2014.07.065
Kim, D., Park, Y., Kim, M., Choi, Y., Park, Y.S., Lee, J. (2015) Optical and structural properties of sputtered CdS films for thin film solar cell applications, Materials Research Bulletin, 69, 78-83. doi: 10.1016/j.materresbull.2015.03.024
Kim, M.J., Kim, H.T. Kang, J.K., Kim, D.H., Lee, D.H., Lee, S.H., Sohn, S.H. (2010) Effects of the surface roughness on optical properties of CdS thin films, Molecular Crystals and Liquid Crystals, 532:1, 21/437-28/444. doi: 10.1080/15421406.2010.497099
Li, M., Li, J.C. (2006) Size effects on the band-gap of semiconductor compounds, Materials Letters, 60, 2526-2529. doi:10.1016/j.matlet.2006.01.032
Lu, C., Zhang, L., Zhang, Y., Liu, S., Liu, G. (2014) Fabrication of CdS/CdSe bilayer thin films by chemical bath deposition and electrodeposition, and their photoelectrochemical properties, Applied Surface Science, 319, 278-284. doi: 10.1016/j.apsusc.2014.08.158
Mouanga, M., Ricq, L., Douglade, G., Douglade, J., Berçot, P. (2006) Influence of coumarin on zinc electrodeposition, Surface and Coatings Technology, 201, 762-767.doi:10.1016/j.surfcoat.2005.12.036
Mouanga, M., Ricq, L., Ismaili, L., Refouvelet,V, Berçot, P. (2007) Behaviour of coumarin in chloride bath: Relationship with coumarin influence on zinc electrodeposition, Surface and Coatings Technology, 201, 7143-7148. doi:10.1016/j.surfcoat.2007.01.022
Pawar, S.M., Pawar, B.S., Kim, J.H., Joo, O.S., Lokhande, C.D. (2011) Recent status of chemical bath deposited metal chalcogenide and metal oxide thin films, Current Applied Physics, 11, 117-161. doi:10.1016/j.cap.2010.07.007
Rusu, G.G., Râmbu, A.P., Buta, V.E., Dobromir, M., Luca, D., Rusu, M. (2010) Structural and optical characterization of Al-doped ZnO films prepared by thermal oxidation of evaporated Zn/Al multilayered films, Materials Chemistry and Physics 123, 314-321.doi:10.1016/j.matchemphys.2010.04.022
Safinajafabadi, A., Sarraf-Mamoory, R., Karimi, Z. (2012) Effect of organic dispersants on structural and mechanical properties of Al2O3/ZrO2 composites, Materials Research Bulletin, 47, 4210-4215. doi: 10.1016/j.materresbull.2012.09.001
Shakir, M., Faraz, M., Khan, M.S., Al-Resayes, S.I. (2015) The photocatalytic, in vitro anthelmintic activity of biomolecule-inspired CdS nanoparticles, Comptes Rendus Chimie, 18, 966-978. doi: 10.1016/j.crci.2015.07.009
Shirokane, Y., Ichikawa, K., Suzuki, M. (2000) A novel enzymic determination of maltose, Carbohydrate Research, Carbohydrate Research, 329, 699-702. doi:10.1016/S0008-6215(00)00232-9
Uda, H., Yonezawa, H., Ohtsubo, Y., Kosaka, M., Sonomura, H. (2003) Thin CdS films prepared by metalorganic chemical vapor deposition, Solar Energy Materials and Solar Cells, 75, 219-226. doi:10.1016/S0927-0248(02)00163-0
Yücel E., Yücel Y., Durak M. (2016) Process optimization for window material CdS thin films grown by a successive ionic layer adsorption and reaction method using response surface methodology, Journal of Alloys and Compounds, 664, 530-537.doi: 10.1016/j.jallcom.2016.01.018
Yücel, E., Güler, N., Yücel, Y. (2014) Optimization of deposition conditions of CdS thin films using response surface methodology, Journal of Alloys and Compounds, 589, 207-212. doi: 10.1016/j.jallcom.2013.11.067
Yücel, E., Yücel, Y. (2015) Optimization of zinc sulfide thin film coating process using response surface methodology, Journal of Materials Science: Materials in Electronics, 26, 196-203. doi:10.1007/s10854-014-2383-3
Yücel, E., Yücel, Y. (2017) Fabrication and characterization of Sr-doped PbS thin Films grown by CBD, Ceramics International, 43, 407-413.doi: 10.1016/j.ceramint.2016.09.173