Sb₂Se₃ Nanosheet Film-Based Devices for Ultraviolet Photodetection and Resistive Switching

Abstract

The development of multifunctional devices could represent a significant advancement in meeting the need for nano and micro technologies. Therefore, we have developed a Ag/Sb 2 Se 3 /FTO-based multifunction device having nanostructures, which works as an ultraviolet (UV) photodetector and a switching device. Our theory suggests how oxygen formation leads to detection in the UV range rather than detection in the infrared range, which is the natural detection range of Sb 2 Se 3 . The m−s−m photodetector device is based on the photoconductive phenomenon, and ultrafast transient absorption spectroscopy has been extensively used to investigate the charge carrier dynamics of Sb 2 Se 3 films of 500 nm. At two distinct excitations, 375 nm UV and 532 nm visible light, and a pulse energy of 1 J per pulse, the effect of annealing on the charge carrier relaxation of the films was investigated. The kinetics of the hot charge carrier's decay and recombination were studied for both as-grown and annealed films. The proposed theory is analyzed with the help of X-ray photoelectron spectroscopy and density functional theory studies. The device shows external quantum efficiency values of 2.9 and 1.3 at 375 and 386 nm, respectively. The rise time to fall time ratio was 0.29/0.30 s at 375 nm irradiation at 2 V bias at a power density of 32 mW/cm 2 . The same device shows bipolar resistive switching, in which resistance shifts from a high resistance state to a low resistance state in a voltage sweep from −1 to 0 V and then 0 to 1 V. The result of the switching phenomenon is reasonably justified by the electrochemical metallization phenomenon. An outstanding accomplishment in electronic devices is combining two different features on a single device.

Recent advancements and progress in development in chalcogenide (S, Se)-based thin films for high-performance photodetectors: a review

“…The device exhibits bipolar resistive switching, where the resistance transitions from a high to a low resistance state during a voltage sweep ranging from −1 to 0 V and subsequently from 0 to 1 V. The electrochemical metallization process well explains the outcome of the switching phenomena. A remarkable achievement in the field of electronic devices is the integration of two distinct functionalities into a single device [109].…”

Synergistic Effects of UV Irradiation on a Flexible Ag/NCQDs-MoS2/Ag/Kapton Resistive-Switching Memory Device

“…Unprecedented multifunctional devices can be designed by synergistically integrating various functional materials at the nanoscale range while maintaining their distinct properties. − Moreover, exploring how the memristor device can be tuned with external stimuli, such as temperature, light, magnetic fields, mechanical stress, and many more, would be intriguing. ,− This exploration promises to enhance our understanding of memristor behavior and the complexities of neural interactions with the surrounding environment. Among all stimuli, light stands out as the most crucial factor for remotely tuning the RS behavior, opening the doors to the development of futuristic optofunctional devices. , In addition, ultraviolet (UV) photodetectors have numerous uses in optical communications, environmental exploration, ozone-layer monitoring, water purification, and chemical and biological investigations. − The fundamental aspects of designing UV-regulated RS memory will be a unique approach for multiple futuristic applications. Such a technology allows the controllability of resistance using both voltage and UV-light pulses.…”

Current Remedy in Ultrathin Crystalline Si Solar Cell by Cu2SnS3 Thin Film toward High Efficiency

“…As a result, chalcogenides could provide high electrical conductivity which increase the overall performance of a PV device. [ 22–24 ] Chalcogenide compounds including Cu(In,Ga)Se 2 (CIGS), CdTe, Sb 2 Se 3 , Cu 2 ZnSnS 4 , CTS, and so on are composed of a diverse array of materials, which enable investigators to select any one that meets their demands best for a certain PV cell application.…”