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Topic: Photochromism in Inorganic materials
Date & Time: 11th February 2020 at 4.00 p.m.
Venue: SSCU Auditorium

Abstract:

The photochromic behavior of Transition metal oxides (TMOs) thin films has since been the subject of many studies over the last 50 years. The word “Photochromism” originates from two Greek words meaning light and color. Photochromism refers to a phenomenon that color of a material is changed between two states, having different absorption spectra, upon electromagnetic irradiation (UV or Visible) and reverse transformation can occur by removing the light source or kept in the dark.

In my talk, I will be explaining the mechanism of photo-coloration in TMOs upon UV-irradiation and this includes enhancement in coloration efficiency and the development of photo-response from UV to Visible and condition of photochromism in the double-layer metal oxide. Then I’ll show applications like smart window materials, which control sunlight transmittance and Ink-free printing, followed by conclusion.

References:

  1. Zhi-Gang ZhaO, Zhi-Fu Liu, and Masahiro Miyauchi. Adv. Funct. Mater. 20, 4162–4167 (2010)
  2. Hidetaka Takaki, Shuhei Inoue, Yukihiko Matsumura. Chemical Physics Letters. 732, 136620 (2019)
  3. Yongqi Yang, Lin Guan, Haicheng Jiang, Lijie Duan and Guanghui Gao. Mater. Chem. C 6, 7619-7625 (2018)
  4. Ligang Cai, Xiaomei Wu, Qiang Gao, Yueming Fan. Dyes and Pigments. 156, 33–38 (2018)