Effect of γ‐irradiation on optical properties of Eu2O3‐doped polystyrene polymer films

Luminescence - Tập 33 Số 7 - Trang 1243-1248 - 2018
Shilpa Bhavsar1, Gnansagar B. Patel1, N. L. Singh1
1Department of Physics, Faculty of Science, The M.S. University of Baroda, Vadodara, India

Tóm tắt

AbstractIn the present study, europium (III) oxide (Eu2O3)‐doped polystyrene (PS) polymer films were synthesized using a solution‐casting technique for different filler levels. These films were irradiated with 5, 25 and 50 kGy γ doses and characterized using various techniques, viz. X‐ray diffraction (XRD), and UV–visible and photoluminescence (PL) spectroscopies as a function of composition level and radiation dose. The UV–visible spectra indicated a decrease in the optical direct band gap of composite films with increasing concentrations of dopant and radiation dose. The band gaps of composites obtained using Tauc's equation were found to be 4.38, 4.37, 4.36 and 4.34 eV for 0, 1, 3 and 5% Eu2O3‐doped PS respectively, while the band gaps of 5% Eu2O3‐doped PS polymer films irradiated with 5, 25 and 50 kGy were found to be 4.30, 4.26 and 4.21 eV, respectively. Photoluminescence (PL) emission spectra showed the characteristic peaks of Eu3+ at 595 nm, 612 nm and 617 nm with an excitation wavelength of 247 nm. The intensity of characteristic peaks of Eu3+ was observed to increase with increasing filler concentration, while it was found to decrease with increasing radiation dose. The polymer under study may be useful in accidental dosimetry. As photoluminescence studies are carried out after a gap of 200 h from irradiation and PL emission of γ‐irradiated polymer yielded 10 times emission when compared with non‐irradiated polymer.

Từ khóa


Tài liệu tham khảo

10.1021/cr8003983

10.1016/S0079-6727(02)00014-9

10.1039/b406082m

10.1021/jp3091667

10.1016/S0022-2313(03)00133-9

10.1016/j.reactfunctpolym.2009.01.008

10.1016/j.synthmet.2009.04.013

10.1016/j.polymdegradstab.2008.04.011

10.1016/j.polymer.2008.09.057

10.1016/j.jmmm.2004.05.021

10.1016/j.apradiso.2015.04.013

10.1016/j.nima.2015.11.130

10.1016/j.tsf.2012.12.043

10.1016/j.physb.2017.12.055

10.1016/j.optcom.2015.04.042

10.1016/j.saa.2015.05.078

10.1016/j.jphotochem.2016.02.013

10.1002/pssb.19660150224

10.1002/pi.1266

10.1016/j.apsusc.2009.08.059

10.1016/S0167-577X(99)00029-4

10.1016/j.optcom.2012.06.018

10.1021/jp994286

10.1021/jp012922

10.1038/s41598-017-16086-x

10.1103/PhysRevLett.73.744

10.1103/PhysRevLett.79.4445

Thông tin
Thông tin xuất bản

Luminescence

Tập 33 Số 7

1243-1248

Thông tin tác giả