Self-powered UV detection using SnO2 nanowire arrays with Au Schottky contact

Chetri, Priyanka; Dhar, Jay Chandra

doi:10.1016/j.mssp.2019.05.003

Cited by 45 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Postica et al [45] used a UV light intensity 32 times compared to our work, however the obtained photoresponse was ∼10 times lower, demonstrating lower both rise and decay times. Similar results were demonstrated with other metal oxide nanowire-based UV sensors: SnO 2 nanowires [50] showed responsivity of 0.36 mA W −1 with a 0.7 rise time, whereas WO 3 nanowires [51] showed responsivity of 462.6 A W −1 with a 2.7 ms rise time.…”

Section: Samples S Betsupporting

confidence: 87%

ZnO tetrapod morphology influence on UV sensing properties

Ilickas,

Mardosaite,

Cesano

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

The aim of this work was to investigate how ZnO tetrapod (ZnO-T) morphology, structure, and their surface charge properties (i.e., Debye length) influence their UV sensing properties, shedding light on the underlying photoresponse mechanisms. ZnO-Ts were synthesized and centrifuged to obtain three different fractions with tuned morphology, which were characterized by SEM, TEM, and HRTEM microscopies, XRD analysis, BET measurements, FTIR and UV-Vis spectroscopies. ZnO-T UV sensors were fabricated and tested comparing among ZnO-T fractions and commercial ZnO nanoparticles. ZnO-T photoresponse was mostly influenced of by ZnO-T leg diameter, with the optimal value close to the double Debye length. We also demonstrated how fractionating ZnO-Ts for morphology optimization can increased the responsivity by 2 orders of magnitude. Moreover, ZnO-T showed 3 orders of magnitude higher responsivity compared to commercial ZnO nanopowder. These results are beneficial for the engineering of efficient UV sensors and contribute to a deeper understanding the overall mechanism governing UV photoresponse.

show abstract

Section: Samples S Betsupporting

confidence: 87%

ZnO tetrapod morphology influence on UV sensing properties

Ilickas,

Mardosaite,

Cesano

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…Although junctions built in two-dimensional layers have a theoretical surface area smaller than junctions built in one-dimensional or mixed layers, because the size of both the TiO 2 and CuMnO 2 crystallites is very small, both of the contact surfaces at the interfaces between oxides and with O 2 (gas) and O 2 - (ads) increase the effective active area at a level almost similar to other techniques. This higher surface area increases electron hole pairs generation without applying an external current (0 V bias) to the FTO-TiO 2 -CuMnO 2 photodetector [ 1 ]. The higher oxygen absorption–desorption process is facilitated by the crednerite layer due to the small nanosize of the crystals and the relatively rough surface obtained after deposition [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

“…Self-powered ultraviolet photodetectors (SPVs) have been widely studied lately because they have a great advantage; namely, they do not need any external power sources, can operate continuously and independently and do not require high costs to produce them [ 1 ]. The operating principle of photodetectors (PD) is very well known, being based on the conversion of photon energy into an electrical signal by photogenerated carriers [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Powered Photodetector Based on FTO/n-TiO2/p-CuMnO2 Transparent Thin Films

et al. 2022

View full text Add to dashboard Cite

A self-powered photodetector with the FTO/n-TiO2/p-CuMnO2 configuration, representing the novelty of the work, was successfully achieved for the first time and presumes two steps: deposition of the n-type semiconductor (TiO2) by the doctor blade method and of the p-type semiconductor (CuMnO2) by the spin coating technique, respectively. Investigation techniques of the structural and morphological characteristics of the as-synthesized heterostructures, such as XRD, UV-VIS analysis, and SEM/EDX and AFM morphologies, were used. The I-t measurements of the photodetector showed that the responsivity in the self-powered mode was 2.84 × 107 A W−1 cm2 and in the 1 V bias mode it was 1.82 × 106 A W−1 cm2. Additionally, a self-powered current of 14.2 nA was generated under UV illumination with an intensity of 0.1 mW/cm2. Furthermore, under illumination conditions, the response time (tres) and the recovery time (trec) of the sensor exhibited a good response; thus, tres = 7.30 s and trec = 0.4 s for the self-powered mode, and in the 1 V bias mode, these were tres = 15.16 s and trec = 2.18 s. The above results show that the transparent heterojunction device of n-TiO2/p-CuMnO2 exhibited a self-powered ultraviolet photodetector with high sensitivity.

show abstract

“…However, the Schottky barrier height extracted by fitting with the double Schottky model is about 0.84 eV, which may be caused by the adsorption of oxygen molecules in air and the state of the semiconductor surface. [27,35] In addition, the ideal factor n of the fitting parameter deviates far from 1, indicating that the carrier transport mechanism deviates greatly from the thermal emission model, and the main reason may be the existence of tunneling current in high oxygen defect semiconductor. [36,37] For the lower righthand insert in Fig.…”

Section: Resistive Switching Mechanismmentioning

confidence: 99%

Resistive switching properties of SnO₂ nanowires fabricated by chemical vapor deposition

et al. 2023

View full text Add to dashboard Cite

Resistive switching (RS) devices have great application prospects in emerging memory and neuromorphic fields, but the stability of the devices and the unclear RS mechanism restrain the relevant application. In this work, we construct a hydrogenated Au/SnO2 nanowire (NW)/Au device with two back-to-back Schottky diodes and investigate the RS characteristics in air and vacuum. We find that the I on/I off ratio increases from 20 to 104 when the reading voltage decreases from 3.1 to -1 V under the condition of electric field. Moreover, the rectification ratio can be up to 104 due to the oxygen ion migration modulated by the electric field. The nanodevice also shows non-volatile resistive memory characteristic. The RS mechanism is clarified based on the changes of the Schottky barrier width and height at the interface of Au/SnO2 NW/Au device. Our results provide a kind of strategy for designing high-performance memristive devices based on SnO2 NWs.

show abstract

Self-powered UV detection using SnO2 nanowire arrays with Au Schottky contact

Cited by 45 publications

References 33 publications

ZnO tetrapod morphology influence on UV sensing properties

ZnO tetrapod morphology influence on UV sensing properties

Self-Powered Photodetector Based on FTO/n-TiO2/p-CuMnO2 Transparent Thin Films

Resistive switching properties of SnO₂ nanowires fabricated by chemical vapor deposition

Contact Info

Product

Resources

About

Self-powered UV detection using SnO2 nanowire arrays with Au Schottky contact

Cited by 45 publications

References 33 publications

ZnO tetrapod morphology influence on UV sensing properties

ZnO tetrapod morphology influence on UV sensing properties

Self-Powered Photodetector Based on FTO/n-TiO2/p-CuMnO2 Transparent Thin Films

Resistive switching properties of SnO2 nanowires fabricated by chemical vapor deposition

Contact Info

Product

Resources

About

Resistive switching properties of SnO₂ nanowires fabricated by chemical vapor deposition