Structural Dependent Eu3+ Luminescence, Photoelectric and Hysteresis Effects in Porous Strontium Titanate

Maryia Rudenko; Nikolai Gaponenko; Vladimir Litvinov; Alexander Ermachikhin; Eugene Chubenko; Victor Borisenko; Nikolay Mukhin; Yuriy Radyush; Andrey Tumarkin; Alexander Gagarin

doi:10.3390/ma13245767

Structural Dependent Eu³⁺ Luminescence, Photoelectric and Hysteresis Effects in Porous Strontium Titanate

Materials (Basel). 2020 Dec 17;13(24):5767. doi: 10.3390/ma13245767.

Authors

Maryia Rudenko¹, Nikolai Gaponenko^{1

2}, Vladimir Litvinov³, Alexander Ermachikhin³, Eugene Chubenko¹, Victor Borisenko^{1

2}, Nikolay Mukhin^{4

5}, Yuriy Radyush⁶, Andrey Tumarkin⁴, Alexander Gagarin⁴

Affiliations

¹ Department of Micro- and Nanoelectronics, Belarusian State University of Informatics and Radioelectronics, P. Browka Str. 6, 220013 Minsk, Belarus.
² Department of Condensed Matter Physics, National Research Nuclear University MEPhI, Kashirskoe Shosse 31, 115409 Moscow, Russia.
³ Department of Micro and Nano Electronics, Ryazan State Radio Engineering University, Gagarin Str. 59, 390005 Ryazan, Russia.
⁴ Faculty of Electronics, Saint Petersburg Electrotechnical University "LETI", Professor Popov Str. 5, 197376 Saint Petersburg, Russia.
⁵ Department of Engineering, University of Applied Sciences Brandenburg, Magdeburger Str. 50, 14770 Brandenburg an der Havel, Germany.
⁶ Scientific-Practical Materials Research Centre of NASB, P. Browka Str. 19, 220072 Minsk, Belarus.

Abstract

Eu³⁺ doped porous nanostructured SrTiO₃ films and powder fabricated by sol-gel route without using any precursor template are characterized by different morphology and phase composition. The films show red and yellow luminescence with the most intensive photoluminescence (PL) bands at 612 nm and 588 nm, respectively. Raman, secondary ion mass spectrometry (SIMS), and X-ray diffraction (XRD) analysis of undoped nanostructured porous SrTiO₃ films showed the presence of TiO₂, SrO, and SrTiO₃ phases and their components. The undoped porous SrTiO₃ films are photosensitive and demonstrate resistive switching. The capacitance-voltage hysteresis loops with the width of about 6 V in the frequency range of 2 kHz-2 MHz were observed.

Keywords: europium luminescence; photocurrent; porous film; resistive switching hysteresis; strontium titanate.

Grants and funding

T19-MLDG/State Committee on Science and Technology of the Republic of Belarus