Growth and optical characterization of PbMo<sub>0.5</sub>W<sub>0.5</sub>O<sub>4</sub> single crystals for UV optoelectronic applications

Mecit G., Isik M., ALTUNTAŞ G., KARATAY A., HASANLI N., Darvishov N. H.

PHYSICA SCRIPTA, cilt.101, sa.2, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 101 Sayı: 2
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1088/1402-4896/ae32d8
  • Dergi Adı: PHYSICA SCRIPTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

PbMo0.5W0.5O4 single crystals were successfully grown via the conventional Czochralski method, and their structural and optical properties were comprehensively investigated. x-ray diffraction analysis confirmed the phase purity and tetragonal scheelite-type structure with lattice parameters determined to be a = 5.3209 & Aring; and c = 12.8099 & Aring;. UV-Visible absorbance and transmission spectroscopy revealed a sharp absorption edge, indicative of a direct allowed electronic transition. The band gap energy was determined to be around 3.15 eV using Tauc plot analysis, supported by relatively low Urbach energy, suggesting minimal structural disorder. Photoluminescence measurements showed prominent green emission peaks at 488 and 512 nm, attributed to intrinsic structural defects and radiative recombination processes. The high optical quality and tunable band gap of PbMo0.5W0.5O4 make it a promising candidate for ultraviolet optoelectronic devices and photocatalytic applications.