Pbi2 single crystal growth and its optical property study

Der Yuh Lin, Bo Cheng Guo, Zih You Dai, Chia Feng Lin, Hung Pin Hsu

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Abstract

In this work, we used the chemical vapor transport (CVT) method to grow PbI2 crystals using iodine as a self-transporting agent. The crystals’ structure, composition, and uniformity were confirmed by X-ray diffraction (XRD) and electron probe microanalysis (EPMA) measurements. We investigated the band gap energy using absorption spectroscopy measurements. Furthermore, we explored the temperature dependence of the band gap energy, which shifts from 2.346 eV at 300 K to 2.487 eV at 20 K, and extracted the temperature coefficients. A prototype photodetector with a lateral metal–semiconductor–metal (MSM) configuration was fabricated to evaluate its photoelectric properties using a photoconductivity spectrum (PC) and persistent photoconductivity (PPC) experiments. The resonance-like PC peak indicates the excitonic transition in absorption. The photoresponse ILight/IDark-1 is up to 200%.

Original languageEnglish
Article number589
JournalCrystals
Volume9
Issue number11
DOIs
Publication statusPublished - 2019 Nov

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

Cite this

Lin, D. Y., Guo, B. C., Dai, Z. Y., Lin, C. F., & Hsu, H. P. (2019). Pbi2 single crystal growth and its optical property study. Crystals, 9(11), [589]. https://doi.org/10.3390/cryst9110589