Effect of $SnCl_2$ heat treatment on SnS thin films deposited by RF sputtering
Küçük Resim Yok
Tarih
2023
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the effect of $SnCl_2$ treatment on SnS thin films was investigated. SnS thin films were grown by RF sputtering and $SnCl_2$ treatment was applied by wet chemical processing. While the samples grouped as $SnCl_2$ heat treated and annealed were subjected to annealing in air atm, the as-deposited sample was not applied any annealing process. The as-deposited sample grew in the orthorhombic SnS phase. Annealing of the SnS sample in air environment led to the formation of orthorhombic SnS as well as non-dominant $SnCl_2$ and $SnCl_2$ phases. It was found that applying $SnCl_2$ heat treatment to SnS deteriorated the crystallization and especially the $SnO_2$ oxide phase became more dominant. Raman spectra confirmed the presence of SnS and SnS2 phases in the samples, but no evidence of $SnO_2$ phase was found. SEM images showed bladelike, dense grain formation in the as-deposited and annealed samples. However, $SnCl_2$ heat treatment completely changed the surface morphology of the sample, causing it to transform into a structure consisting of several domains split by deep fractures. EDS revealed a distinct Sn-rich composition of the as-deposited and annealed samples (Sn/S~1.2). On the other hand, $SnCl_2$ heat treatment caused a massive loss of sulphur in the atomic distribution of the SnS and it was seen that the Sn/S ratio increased to around 7.5. The band gaps of the as-deposited and annelaed samples were calculated as 1.43 eV and 1.45, respectively. However, $SnCl_2$ heat treatment led to an increase to 1.56 eV of the band gap. Analysis results show that $SnCl_2$ treatment by the wet processing causes a significant change on the characteristics of SnS thin film. In this context, it can be said that $SnCl_2$ heat treatment can be further improved with optimization processes.
Açıklama
Anahtar Kelimeler
Nanobilim ve Nanoteknoloji, Kimya, Uygulamalı, Malzeme Bilimleri, Özellik ve Test, Çevre Bilimleri, Mühendislik, Kimya, RF sputtering, SnS, air annealing, $SnCl_2$ treatment
Kaynak
Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
12
Sayı
3
