Synthesis of La doped ZnS quantum dots by SILAR method and investigation of their properties

Yıl 2018, Cilt: 20 Sayı: 2, 246 - 254, 01.12.2018

Arzu Ekinci Muhammed Günbat Sabit Horoz Ömer Şahin

https://doi.org/10.25092/baunfbed.428969

Öz

In this study, the
structural, morphological, optical and photovoltaic properties of La-(%1)-doped ZnS quantum dots (QDs) synthesized at room temperature using successive
ionic layer adsorption and reaction (SILAR) method were investigated by x-ray
diffraction (XRD), scanning electron microscopy (SEM) optical absorption and
incident photon-to-electron conversion efficiency (IPCE),respectively.

 

It was observed that
the particle size and energy band gap of La-doped ZnS QDs were changed compared
to pure ZnS due to the La additive.Furthermore,
photovoltaic properties of La-doped ZnS QDs were investigated by IPCE
measurement for the first time in this current study. Thus, this study suggests
that La-doped ZnS QDs can be used as promising sensitizers in solar cell
applications.

Anahtar Kelimeler

Zinc sullfide, photovoltaic, characterization, doping, SILAR method

La katkılı ZnS kuantum noktalarının SILAR yöntemi ile sentezlenmesi ve onların özelliklerinin incelenmesi

Öz

Bu çalışmada, ardışık iyonik tabaka adsorpsiyon ve reaksiyonu (SILAR)
yöntemi kullanılarak oda sıcaklığında sentezlenen La (%1)-katkılı ZnS
kuantum noktalarının (QDs) yapısal, morfolojikyüzeysel, optik ve
fotovoltaik özellikleri sırasıyla x- ray kırınımı (XRD), taramalı elektron
mikroskobu (SEM), opticabsorpsiyon optik absorpsiyon ve
gelen fotonun elektrik akımına dönüşüm verimi (IPCE) gibi ölçümler yapılarak
incelendi.

 

La katkı maddesinden dolayı La katkılı ZnS QD’lara ait
parçacık boyutu ve enerji band bant aralığının saf
ZnS’ye kıyasla değiştiği gözlemlendi.  Ayrıca, ilk defa bu mecvcut mevcut çalışmada,
IPCE ölçümü yapılarak La katkılı ZnS QD’lara ait fotovoltaik özellikler
incelendi. Böylece, La katkılı ZnS QD’ların güneş pil uygulamalarında
umut verici hassaslaştırıcılar olarak kullanılabileceği bu çalışmada
önerilmektedir.

Anahtar Kelimeler

Çinko sülfür, fotovoltaik, karakterizasyon, katkılama, SILAR metod

Kaynakça

• Soni, H., Chawda, M. ve Bodas, D., Study of electrical and optical properties of Mn doped ZnS clusters, Material Letters, 63, 30, 2669–2671, (2009).
• Göde, F., Gümüş, C. ve Zor, M., Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method, Journal Crystal Growth, 299, 1, 136-141, (2007).
• Yamaguchi, T., Yamamoto, Y., Tanaka, T. ve Yoshida, A., Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method,Thin Solid Films, 343, 4, 516-519, (1999).
• Bredal, M. ve Merikhi, J., ZnS precipitation: morphology control, Journal of .Material Science, 33, 471-476, (1998).
• Kamat, P.V., Quantum dot solar cells. The next bigthing in photovoltaics, Journal of Physical Chemstry Letters, 4, 908–918, (2013).
• Kouhnavard, M., Ikeda, S., Ludin, N.A., Ahmad Khairudin, N.B., Ghaffari, B.V., Mat-Teridi, M.A., Ibrahim, M.A., Sepeai, S. ve Sopian, K., A review of semiconductor materials as sensitizers for quantum dot-sensitized solar cells. Renewable and Sustainable Energy Reviews, 37, 397–407, (2014).
• Roy, P., Ota, J.R. ve Srivastava, S. K., Crystalline ZnS thin films by chemical bath deposition method and its characterization, Thin Solid Films, 515,4, 1912, (2006).
• Karakaya, S., Gençyilmaz O. ve Özbas Ö., In katkılı CdS filmlerinin optik, elektriksel ve yüzeysel özelliklerinin incelenmesi, Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi ,14, 2, 52-58, (2012).
• Prasad, N. ve Balasubramanian, K., Optical, phonon and efficient visible and infrared photocatalytic activity of Cu doped ZnS microcrystals, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 173, 687-694, (2017).
• Archbold, M.D., Halliday, D.P., Durose, K., Hase, T.P.A., Boyle, D.S., Mazzamuto, S., Romeo, N. ve Bosio, A., Development of low temperature approaches to device quality CdS: A modified geometry for solution growth of thin films and their characterisation, Thin Solid Films, 515, 295, (2007).
• Sambasivam, S., Reddy, B.K., Divya, A., Madhusudhana Rao, N., Jayasankar, C.K. ve Sreedhar, B., Optical and ESR studies on Fe doped ZnS nanocrystals, Physics Letters A, 373, 1465-1468, (2009).
• Huang, C.M, Chen, L.C., Pan, G.T., Yang, C.K., Chang, W.S. ve Cheng, K.W., Effect of Ni on the growth and photoelectrochemical properties of ZnS thin films, Materials Chemisty and Physics, 117, 156-162, (2009).
• Sarkar, R.,Tiwary, C.S., Kumbhakar, P. ve Mitra, A.K., Enhanced visible light emission from Co2+ doped ZnS nanoparticles, Physica B, 404, 3855-3858, (2009).
• Gallagher, D., Hong, X. ve Nurmikko, A., Optical properties of manganese-doped nanocrystals of ZnS, Physical Review Letters, 72, 416- 419, (1994).
• Jose, P.A., Beatriz, J.L., Eloisa, C., Purificacio, E., Fabienne, P. ve Bruno, V., Lanthanide doped ZnS quantum dots dispersed in silica glasses: an easy one pot sol–gel synthesis for obtaining novel photonicmaterials, Journal of Materials Chemistry, 18, 5193-5199, (2008).