Blueshifted dielectric properties and optical conductivity of new nanoscale nickel-(II)-tetraphenyl-21H,23H-porphyrin films as a function of UV illumination for energy storage applications

A El-Denglawey; H A Alburaih; M M Mostafa; M S S Adam; M M Makhlouf

doi:10.1007/s11082-021-02972-2

Blueshifted dielectric properties and optical conductivity of new nanoscale nickel-(II)-tetraphenyl-21H,23H-porphyrin films as a function of UV illumination for energy storage applications

Opt Quantum Electron. 2021;53(6):343. doi: 10.1007/s11082-021-02972-2. Epub 2021 Jun 24.

Authors

A El-Denglawey^{1

2}, H A Alburaih³, M M Mostafa^{4

5}, M S S Adam^{6

7}, M M Makhlouf^{4

8}

Affiliations

¹ Physics Department, Turabah University College, Taif University, Turabah, 21995 Saudi Arabia.
² Nano & Thin Film Laboratory, Physics Department, Faculty of Science, South Valley University, Qena, 83523 Egypt.
³ Physics Department, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Kingdom of Saudi Arabia.
⁴ Science & Technology Department, Rania University College, Taif University, Rania, 12975 Kingdom of Saudi Arabia.
⁵ Physics Department, Faculty of Science, Suez University, Suez, Egypt.
⁶ Chemistry Department, Faculty of Science, King Faisal University, 380, Al Hassa-31982, Al Hofuf, Kingdom of Saudi Arabia.
⁷ Chemistry Department, Faculty of Science, Sohag University, Sohag-82534, Egypt.
⁸ Department of Physics, Damietta Cancer Institute, Damietta, Egypt.

Abstract

Pristine thermally evaporated nickel-(II)-tetraphenyl-21H,23H-porphyrin (NiTPP) thin films are amorphous, but after 4 and 8 h of UV illumination, the films become crystalline with preferred orientations of (112), (103) and (004) and crystallite sizes of (13, 18, 16) and (42, 31, 38) nm after 4 and 8 h, respectively. After UV illumination for 4 and 8 h, the NiTPP thin films are characterized by blueshifted absorption coefficients, increasing the optical and fundamental gap values and decreasing the dispersion parameter values. The dielectric properties display energy storage regions corresponding to the peak values of optical conductivity, which provides an elegant confirmation of the tailoring and tuning of band gaps, energy storage properties and optical conductivity by UV illumination time. Therefore, NiTPP films may be good candidates for environmental and energy storage applications.

Keywords: Energy conversion and storage; Nanomaterials; Optical conductivity; Phase and optical properties; Photovoltaic system; Thin films.