Determining the refractive index and the dielectric constant of PPDT2FBT thin film using spectroscopic ellipsometry
Determining the refractive index and the dielectric constant of PPDT2FBT thin film using spectroscopic ellipsometry
复制标题
使用光谱椭圆光度法测定 PPDT2FBT 薄膜的折射率和介电常数
DOI:
10.1016/j.optmat.2020.110445
复制
发表时间:
2020
影响因子:
3.9
通讯作者:
Chen, Maggie Yihong
中科院分区:
文献类型:
--
作者:
Howlader, Chandan;Hasan, Mehedhi;Zakhidov, Alex;Chen, Maggie Yihong
Despite the recent increase in PPDT2FBT polymer thin film applications for optoelectronic devices, a comprehensive study of this material's optical dispersion properties is unavailable. The optical properties of the PPDT2FBT thin film is investigated using variable-angle spectroscopic ellipsometry (VASE) at ambient conditions. Knowledge of optical dispersion properties is essential for designing and fabricating optoelectronic devices such as solar cells, photodetectors, and photodiodes. In this research, we determined the dielectric function of PPDT2FBT thin film using the B-spline model and then reproduced the dielectric function using Psemi-Tri oscillators. We estimated the refractive index (n) of the thin film to be between 2.00 and 2.15 and the extinction coefficient (k) to be in the range of 1.14–1.39 at a wavelength of 632.8 nm. We further verified the estimated optical properties from the model using directly measured quantities such as transmission and absorption data obtained using the ultraviolet–visible (UV–Vis) spectrometer and thicknesses obtained using a surface profilometer. In addition, we determined the optical band gap of PPDT2FBT using the absorption coefficient.
登录
查看更多内容
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
S. Seifert;P. Runge
通讯作者:
P. Runge
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
V. Vohra;I. Osaka;K. Takimiya;H. Murata
通讯作者:
H. Murata
影响因子:
1.7
作者:
M. Mazumder;Raju Ahmed;M. Hasan;Soon;M. Lee
通讯作者:
M. Lee
DOI:
--
发表时间:
2020
期刊:
OPTO
影响因子:
--
作者:
C. Howlader;M. Hasan;Alexander Zakidov;M. Y. Chen
通讯作者:
M. Y. Chen
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
J. Willemsen
通讯作者:
J. Willemsen