Temperature-dependent tuning of band gap of Fe3O4 nanoparticles for optoelectronic applications

Delice S., Isik M., HASANLI N.

Chemical Physics Letters, cilt.840, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 840
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.cplett.2024.141139
  • Dergi Adı: Chemical Physics Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: Fe3O4, Nanoparticles, Optical properties, Oxides
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We have investigated structural, morphological and temperature dependent absorption characteristics of Fe3O4 nanoparticles. X-ray diffraction pattern exhibited six diffraction peaks belonging to the cubic phase structure with lattice parameter of a = 8.1602 Å. Spectral variation of absorption coefficient were utilized to achieve Tauc and spectral derivative analyses providing the band gap of the Fe3O4 at varying temperature. The band gap of Fe3O4 nanoparticles was found around 2.08 eV at 300 K and around 2.14 eV at 10 K. The band gap variation with applied temperatures between 10 and 300 K were also investigated using Varshni relation.