Interdigitated electrodes connected WO3 nanowire arrays for high performance UV photodetection

Singh, Atul Kumar; Chetri, Priyanka; Dhar, Jay Chandra

doi:10.1016/j.matlet.2022.133692

Cited by 3 publications

(1 citation statement)

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“…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

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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.

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Section: Samples S Betsupporting

confidence: 87%