Improvement in the structural and optical properties of Cu2SnS3 (CTS) thin films through soft-annealing treatment
Küçük Resim Yok
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Academic Press Ltd- Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this work, Cu2SnS3 thin films were synthesized by soft-annealing treatment of Cu and Sn film layers at various temperatures (200, 250, 300, and 350 degrees C) deposited on molybdenum-coated glass (Mo/Cu/Sn) employing sequential sputter deposition technique followed by sulfurization process at 550 degrees C utilizing RTP. Effect of the soft-annealing treatment and temperature on the compositional, structural and optical properties of CTS thin film was examined using EDX, XRD, Raman spectroscopy, SEM, and optical spectroscopy techniques. All CTS films demonstrated Cu-poor composition regardless of the soft-annealing treatment according to EDX measurements. Irrespective of the soft-annealing temperature, all samples showed formation of monoclinic crystal structure of CTS phase and some secondary phases in their XRD patterns. It was found that the sample soft-annealed at 250 degrees C had more desired crystalline quality amongst the other prepared samples. Formation of the CTS structure was confirmed by Raman spectroscopy measurements. SEM images of the samples demonstrated denser and smoother microstructure by raising the soft-annealing temperature up to 250 degrees C. Optical band gap of the films showed variation between 0.85 eV and 0.90 eV that may be influenced by crystalline quality of the films.
Açıklama
Anahtar Kelimeler
Cu2SnS3 (CTS), Sputtering, Soft-annealing, Two-stage method
Kaynak
Superlattices and Microstructures
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
138
