Tailoring the interface assembly of mesoporous TiO₂ on BTO film toward high-performance UV photodetectors

Abstract

The TiO2 based nanomaterials are considered to be the most promising photoelectric materials for the construction of high-performance ultraviolet photodetector. Nevertheless, it has always suffered from the poor interface crystallinity...

Dual crosslinked PMMA/BaTiO3 polymer nanocomposite dielectrics for flexible film capacitors

“…The polymer nanocomposite with the core-shell structure exhibited improved interfacial compatibility, which resulted in few defects of the two-phase interface and the reduced impedance between the polymer and the nanoparticles. 55,80 In addition, the film with PMMA-BT3 as the dielectric had a much high capacitance of 1122 pF. Considering that nanocomposites with chemical bonding had a higher dielectric constant and lower dielectric loss than the physical bonded nanocomposites, 68,75,77 it was expected that the structural design of PMMA-BT materials may be a promising method to fabricate high dielectric property films.…”

Pyro-Phototronic Effect-Enhanced Photocurrent of a Self-Powered Photodetector Based on ZnO Nanofiber Arrays/BaTiO3 Films

“…Ferroelectric materials have gained attention for applications in photoelectric devices, information storage, and sensors because of highly controlled unique spontaneous polarization and pyroelectric and photovoltaic effects. − As one of the ferroelectric perovskite materials, barium titanate (BaTiO 3 , BTO) with a band gap of 3.2–3.5 eV has been continuously studied due to the excellent characteristics of stability, innocuity, and a high ferroelectric polarization field. − Moreover, the compact BTO film can be obtained via the low-cost sol–gel spin-coating process undergoing 500–700 °C calcination . The significantly enhanced photocurrent of the polarized ferroelectric BTO film at the UV region is caused by the ferro-pyro-phototronic phenomenon as the temperature fluctuates.…”

Hydrothermal topotactic epitaxy of SrTiO3 on Bi4Ti3O12 nanoplatelets: understanding the interplay of lattice mismatch and supersaturation

“…Heterostructural lms are important constituents of optical devices such as photodetectors and photodiodes. [7][8][9] For example, self-powered photodetectors with enhanced performance can be constructed from p-n heterojunctions (p-CuS-ZnS/n-SrTiO 3 ), in which photogenerated electron-hole pairs are effectively separated due to a built-in electric eld, which results in a stable photocurrent without the need for external power. 7 Apart from a p-n junction, the built-in ferroelectric eld for the improved separation of photo-induced carriers could also be achieved by means of the intrinsic, self-polarization of a ferroelectric lm.…”

“…This was realized in a high-performance UV photodetector based on a mesoporous TiO 2 layer on ferroelectric BaTiO 3. 8 A transparent Schottky photodiode constructed from AgNi nanowires (highwork-function electrode), spin-coated on a SrTiO 3 single crystalline wafer is another example of the advanced architecture of a perovskite-based, multifunctional optical device that enables simultaneous, bias-free, short-wavelength blue-light detection and transparent ultraviolet-light shielding. 9 When designing heterostructured particles, we must consider that two compounds can form a heteroepitaxial interface under the condition that there is a crystallographic orientation relationship with a sufficiently small lattice mismatch between them.…”