An enhanced solar-blind ultraviolet photodetector based on polyvinyl alcohol/carbon nanodots film

Localized surface plasmon enhanced carbon dots based solar-blind ultraviolet photodetectors by Al nanoparticles

“…CDs and polyvinyl alcohol (PVA) were mixed in a ratio of 9:1 to form colloid, which was coated above the electrodes as the active layers by the homogenizer spin coating (SUSS MicroTec, Labspin) at 2000 to 3000 rpm for 60 s. The detailed preparation of CDs mixed with PVA colloid could be found in our previous work. 15,16 Field emission scanning electron microscope (SEM, Quanta 200 FEI) was employed to characterize the surface morphology of Al NPs. Sample UV-visible (UV-vis) absorption was measured by a UV-visible spectrophotometer (UV2600).…”

“…After obtaining Al NPs on the substrate, the Al interdigital electrodes were also deposited on the Al NPs by vacuum coating machine (ZZS500-3/G). CDs and polyvinyl alcohol (PVA) were mixed in a ratio of 9:1 to form colloid, which was coated above the electrodes as the active layers by the homogenizer spin coating (SUSS MicroTec, Labspin) at 2000 to 3000 rpm for 60 s. The detailed preparation of CDs mixed with PVA colloid could be found in our previous work 15 , 16 …”

“…[12][13][14] Carbon dots (CDs) recently emerge as superior materials owing to their unique properties, such as good biocompatibility, excellent photostability, and chemical inertness. In the previous work, CDs prepared by electrochemical method have an absorption peak at 230 nm with strong absorbance in the solar-blind band, 15,16 which indicate the application potential of the CDs in solar-blind UV detection. However, a large amount of light does not be absorbed in the active layer, which causes the optical response ability of CDs to be not ideal, so the performance of CDs-based photodetectors still needs to be improved.…”

Photocurrent conversion capability of a 2D WS2-polyvinyl alcohol matrix and its DFT-based charge carrier dynamics analysis

“…This result is very close to the previously reported PVA/CQD-based device responsivity of 0.26 A W À1 . 54 According to relation (10), the gain of a photoconductor is equal to the minority carrier recombination lifetime divided by the time the carriers need to travel across the semiconductor between the two contacts of the device. Given that the transit time is significantly less than the recombination lifetime, a photoconductor will inevitably experience a considerable gain.…”

Doped Polyaniline/Graphene Composites for Photothermoelectric Detectors

“…24 Photodetectors take advantage of involving polymers as composite components, improving solution mixing, mechanical flexibility, long-term stability, and biocompatibility, leading to potential brand applications in PTE areas. 25 Previous investigation of poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)benzidine], 26 poly(vinyl alcohol) (PVA), 27 [1,2,5]selenadiazolo [3,4-c]pyridine, 28 and other polymers from nearinfrared to ultraviolet photodetectors implies the possibility of further detection in the long-wavelength infrared to terahertz range. Our previous work introduced poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as the transparent detector composite.…”