Fabrication of a UV Photodetector Based on n-TiO2/p-CuMnO2 Heterostructures

Abstract

The heterojunction based on n-TiO2 nanolayer/p-CuMnO2 thin film was achieved using an efficient two-step synthesis process for the fabrication of a UV photodetector. The first step consisted of obtaining the TiO2 nanolayer, which was grown on titan foil by thermal oxidation (Ti-TiO2). The second step consisted of CuMnO2 thin film deposition onto the surface of Ti-TiO2 using the Doctor Blade method. Techniques such as X-ray diffraction, UV-VIS analysis, SEM, and AFM morphologies were used for the investigation of the structural and morphological characteristics of the as-synthesized heterostructures. The Mott–Schottky analysis was performed in order to prove the n-TiO2/p-CuMnO2 junction. The I-V measurements of the n-TiO2 nanolayer/p-CuMnO2 thin film heterostructure confirm its diode characteristics under dark state, UV and visible illumination conditions. The obtained heterojunction, which is based on two types of semiconductors with different energy band structures, improves the separating results of charges, which is very important for high-performance UV photodetectors.

A novel high performance photodetection based on axial NiO/β-Ga2O3 p-n junction heterostructure nanowires array

“…Researchers in the recent times have shown various configurations of p-n junction based on thin film (TF), core-shell etc, for high performance PDs application [5]. Mircea Nicolaescu et al reported n-TiO 2 /p-CuMnO 2 TF based HS PD where separation of charge carries was ensued at good amount [6]. Yachao Wang et al reported all-oxide NiO/β-Ga 2 O 3 p-n TF HS based PD for good stability and reproducibility of its optoelectronic characteristics [7].…”

Review on Structural Adjustment Strategies of Titanium‐Based Metal Oxide Dimensionally Stable Anodes in Electrochemical Advanced Oxidation Technology

“…The doping of metal elements can increase the carrier concentration and the semiconductor properties of SnO 2 , and at the same time change the surface morphology of the electrode and the grain size of the active layer, thereby affecting the electrocatalytic activity of the electrode. [ 143 ] Mn was doped into the SnO 2 –Sb anode layer, and it was found that the Mn‐doped electrode exhibited better electrochemical performance than the undoped Ti/SnO 2 –Sb electrode. [ 42 ] The decolorization rate of MB dye wastewater reached 97% within 10 min at a low cell voltage of 4.5 V, which is 29% higher than that of the undoped electrode.…”

Unconventional Enhancement of UV Photodetection in Surface-Passivated TiO2 Thin Film Photodetectors

“…Ultraviolet (UV) photodetectors have found widespread applications across diverse domains, including chemical analysis, water purification, flame detection, early missile plume identification, secure space-to-space communication, chemical and biological sensing, and environmental monitoring. , Ozone-layer depletion can cause the harmful UV radiation to penetrate our atmosphere and reach the Earth’s surface . However, the hazardous effects of UV-A to UV-C radiation on human health, such as premature aging, skin damage, and the risk of cancer, underscore the importance of accurately detecting and avoiding these harmful rays. − …”