Effect of Annealing on the Optical Properties of Copper Zinc Tin Sulfide (CZTS) Thin Films Deposited Using a Modified Successive Ionic Layer Adsorption and Reaction (SILAR) Method
Source abstract
Abstract
Copper zinc tin sulfide (CZTS) films deposited using a modified successive ionic layer adsorption and reaction (SILAR) method were annealed in air. Surface growth was examined using X-ray photoelectron spectroscopy and scanning electron microscopy. With a suitable orientation in plane (112) at 2θ = 27.88°, the films crystallized in a kesterite structure. The impacts of annealing temperature and time on film optical properties were investigated using absorption and transmission spectroscopy. Whereas SILAR-grown CZTS films usually exhibit a somewhat disorganized nanocrystalline structure and band gaps of 1.3–1.8 eV, annealing lowered the band gap to 1.4–1.5 eV and improved absorption while weakly affecting composition. The films annealed at 250 °C for 120 min had a band gap of 1.3 eV and at 250 °C for 90 min displayed advantageous optical properties, namely an optical band gap of 1.5 eV, refractive index of 2.9, high-frequency dielectric constant of 8.5, and static dielectric constant of 13.900. These results demonstrate the effectiveness of the modified SILAR deposition method.
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Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Technology Sciences, University Amar Telidji, 03000 Laghouat, Algeria
Laboratory of Development Renewables Energys and Their Applications in Sahara Areas (LDREAS), Faculty of Exact Sciences, Tahri Mohammed University, 08000 Bechar, Algeria
Laboratoire de Mico-Optoelectronique et Nanostructures, Faculté des Sciences, Université de Monastir, 5000 Monastir, Tunisia
Departement of physics, Faculty of Exact Sciences and Computer Science, University of Jijel, 18000 Jijel, Algeria
Instituto de diseño y Fabricación (IDF), Universitat Politècnica de València, 46022 València, Spain
Laboratory of Mechanics, Laghouat University, 03000 Laghouat, Algeria
Laboratoire Matériaux, Systèmes Énergétiques, Énergies Renouvelables et Gestion de l’Énergie (LMSEERGE), University Amar Telidji, 03000 Laghouat, Algeria
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