Characterization of one-step deposited Cu2ZnSnS4 thin films derived from a single crystalline powder

Peksu, Elif
Terlemezoğlu, Makbule
Parlak, Mehmet
Karaağaç, Hakan
In this paper, Cu-deficient and Zn-rich Cu2ZnSnS4 (CZTS) single crystals were successfully grown by Bridgman technique. Following the investigation of structural and photo-electrical properties of the grown CZTS crystal, the powder extracted from it was evaporated through electron-beam technique for the fabrication of CZTS thin films by one-step deposition. Compositional analysis revealed that CZTS thin films were obtained with a composition stoichiometry very close to that measured for the crystal powder. Detailed XRD and Raman analyses have shown that the as-grown CZTS films have an amorphous matrix and then transform into a polycrystalline form with a monophase kesterite phase having (112) oriented plane direction following the post-annealing process at 500 degrees C. The optical band gap was found to be 1.50 eV for the CZTS film annealed 500 degrees C. The conducted photo-electrical measurements revealed that CZTS thin films have good sensitivity to the visible light, which is essential for an absorber layer in the solar cell device structure. The room temperature values of conductivity, mobility and hole carrier concentration of the films annealed at 500 degrees C were determined as similar to 5.1 x 10(-4) (Omega cm)(-1), 1.22 cm(2)/V s and 2.6 x 10(15) cm(-3), respectively.


Characterization of lignocellulose biomass and model compounds by thermogravimetry
Kök, Mustafa Verşan (Informa UK Limited, 2017-01-01)
In this research, combustion characteristics of lignocellulose biomass (hazelnut shell) and three main components (cellulose, hemicellulose, and lignin) were investigated using thermogravimetry (TGA-DTG) technique at different heating rates. The ignition, peak, burn-out temperatures, and the heat liberation of lignocellulose biomass and three main components were also measured. Two different model-free kinetic methods, known as Ozawa-Flynn-Wall (OFW) and Kissinger-Akahira-Sunose (KAS), were used in order to...
Preparation and characterization of cost effective spray pyrolyzed absorber layer for thin film solar cells
Sankir, Nurdan D.; Aydin, Erkan; Unver, Hulya; Uluer, Ezgi; Parlak, Mehmet (Elsevier BV, 2013-09-01)
In this study, highly (1 1 2) oriented crystalline copper indium disulfide (CuInS2) thin films with high mobility have been deposited via ultrasonic spray pyrolysis. Structural and electrical properties of CuInS2 thin films were examined to utilize them in solar cell applications. Various amounts of precursor solution ranging from 0.25 to 2.02 ml/cm(2) were used to form CuInS2 thin films onto the soda lime glass substrates. Scanning electron microscopy (SEM) analysis revealed that all sprayed films were pin...
Conjugated polymers with benzothiadiazole and benzotriazole moieties for polymer solar cells
Keles, Duygu; Erer, Mert Can; Bolayir, Eda; CEVHER, ŞEVKİ CAN; Hizalan, Gonul; Toppare, Levent Kamil; Çırpan, Ali (Elsevier BV, 2019-08-01)
In this study four novel random polymers, comprising benzothiadiazole and benzotriazole as the accepting units and benzodithiophene as the donor unit, were synthesized via Stille polymerization reaction. Moreover, effects of fluorine atom and pi bridges on optical, electrochemical and optoelectronic properties were investigated. Optical band gap values of P1, P2, P3 and P4 were found as 1.78 eV, 1.72 eV, 1.63 eV and 1.73 eV, respectively. Characterization of polymers via IJV Vis NIR spectroscopy, cyclic vol...
Production of Cellulase and Xylanase Enzymes Using Distillers Dried Grains with Solubles (DDGS) by Trichoderma reeseiat Shake-Flask Scale and the Validation in the Benchtop Scale Bioreactor
Çekmecelioğlu, Deniz (Springer Science and Business Media LLC, 2020-01-01)
Most of the corn-ethanol plants use dry-mill process and generate large volume of distillers dried grains with solubles (DDGS) as the co-product. The DDGS is a promising feedstock with rich content of cellulose and xylan. The goal of this study was to optimize cellulase and xylanase production byTrichoderma reesei(NRRL 6156) using DDGS as the carbon source at shake-flask and validate the results at benchtop bioreactors. The fermentation medium containing varied amounts of dilute-acid pretreated DDGS, yeast ...
Effects of different laser modified surface morphologies and post-texturing cleanings on c-Si solar cell performance
Radfar, Behrad; ES, FIRAT; Turan, Raşit (Elsevier BV, 2020-01-01)
Performance of crystalline Silicon solar cells depends on numerous factors. One key factor is a surface structure which can restrict electrical and optical properties due to recombination of generated carriers and reflection of incident light. Surface texturing reduces reflection from a flat surface which increases absorption of light. Anisotropic alkaline etchants are commonly used for texturing mono-crystalline Silicon wafers which produce pyramid structures on the surface. Because of randomly oriented cr...
Citation Formats
E. Peksu, M. Terlemezoğlu, M. Parlak, and H. Karaağaç, “Characterization of one-step deposited Cu2ZnSnS4 thin films derived from a single crystalline powder,” RENEWABLE ENERGY, pp. 1133–1142, 2019, Accessed: 00, 2020. [Online]. Available: