Ultraviolet photodetector based on TiO2 nanoparticles/porous silicon hetrojunction

Nayef, Uday M.; Hubeatir, Kadhim A.; Abdulkareem, Zahraa J.

doi:10.1016/j.ijleo.2015.12.002

Cited by 47 publications

(17 citation statements)

References 17 publications

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“…Although TiO 2 -based photodetectors are attractive for their UV detection ability, they suffer from low absorption and hence low responsivity due to their large band gap 10 . It was already proposed to improve the photo-responsivity of TiO 2 -based photodetectors by forming a heterojunction with other narrow bandgap materials like Si to extend its detectivity to the visible 11,12 . Hence, fabricating heterojunction using silicon and TiO 2 can help absorbing light across the UV and the visible 13 .…”

Section: Introductionmentioning

confidence: 99%

Low-cost photodetector architectures fabricated at room-temperature using nano-engineered silicon wafer and sol-gel TiO2 – based heterostructures

Banerjee

Asuo

Pignolet

et al. 2019

Sci Rep

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In the last decades, significant research has been done on the nanocrystalline forms of titanium dioxide (TiO2). Amorphous TiO2 has not been studied intensively despite being significantly less expensive compared to crystalline TiO2. This study reveals significant improvement in UV-VIS photodetection properties from heterostructures fabricated in ambient environment using n-type silicon nanowire arrays and amorphous TiO2 sol-gel. Our ultra-low-cost UV-VIS photodetectors can cover a wide range of applications. We report fast rise/decay time constants of 0.23 ms/0.17 ms and high responsivity up-to 6.0 A/W in the UV and 25.0 A/W in the visible range under low (1 V) external bias. The large surface area due to the nanowire array architecture leads to 2 orders of magnitude enhancement in photo-response. Besides the final electrode deposition, the entire device fabrication is performed using low-cost, all solution-based methods in ambient conditions. These low-cost UV-Visible broadband photodetectors can potentially serve a wide range of applications.

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Section: Introductionmentioning

confidence: 99%

Low-cost photodetector architectures fabricated at room-temperature using nano-engineered silicon wafer and sol-gel TiO2 – based heterostructures

Banerjee

Asuo

Pignolet

et al. 2019

Sci Rep

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“…), which play a crucial role for the effective detection of (bio)molecules. Mainly, MOx nanolayers/nanoparticles can be deposited over a nano-Si surface through the following techniques: (i) RF and DC magnetron sputtering [24,34,36,37,120,121,123,124,125,126]; (ii) sol–gel/hydrothermal synthesis + spin coating [17,26,127,128,129,130,131]; (iii) drop casting technique + pulsed laser ablation in liquid [132]; (iv) vapor–liquid–solid growth and chemical vapor deposition [25,40,133]; (v) catalytic immersion method [134]; and (vi) electrochemical and chemical deposition [35,122,135].…”

Section: (Bio)sensors Based On Nano-si and Metals Oxides Nanocompomentioning

confidence: 99%

Nanosilicon-Based Composites for (Bio)sensing Applications: Current Status, Advantages, and Perspectives

Myndrul

Iatsunskyi

2019

Materials

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This review highlights the application of different types of nanosilicon (nano-Si) materials and nano-Si-based composites for (bio)sensing applications. Different detection approaches and (bio)functionalization protocols were found for certain types of transducers suitable for the detection of biological compounds and gas molecules. The importance of the immobilization process that is responsible for biosensor performance (biomolecule adsorption, surface properties, surface functionalization, etc.) along with the interaction mechanism between biomolecules and nano-Si are disclosed. Current trends in the fabrication of nano-Si-based composites, basic gas detection mechanisms, and the advantages of nano-Si/metal nanoparticles for surface enhanced Raman spectroscopy (SERS)-based detection are proposed.

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“…In recent years, UV PDs have played an important role in different applications which have been extensively explored in the areas of human health, pollution monitoring, flame detection, water sterilization, and missile warning systems [ 4 ]. Many metal oxide semiconductors (MOSs) are also employed in UV detection; examples include silicon carbide (SiC), gallium nitride (GaN), titanium dioxide (TiO 2 ), and zinc oxide (ZnO) [ 5 , 6 , 7 , 8 ]. Among them, ZnO is one of the most explored, partly because of its distinct properties (e.g., non-toxicity, high electron mobility, biocompatibility, and low cost) and potential applications in optoelectronic components.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ultraviolet Photodetectors Based on Fe-Doped ZnO Nanorod Structures

Chu

Young

et al. 2020

Sensors

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In this paper, 100 nm-thick zinc oxide (ZnO) films were deposited as a seed layer on Corning glass substrates via a radio frequency (RF) magnetron sputtering technique, and vertical well-aligned Fe-doped ZnO (FZO) nanorod (NR) arrays were then grown on the seed layer-coated substrates via a low-temperature solution method. FZO NR arrays were annealed at 600 °C and characterized by using field emission scanning microscopy (FE-SEM) and X-ray diffraction spectrum (XRD) analysis. FZO NRs grew along the preferred (002) orientation with good crystal quality and hexagonal wurtzite structure. The main ultraviolet (UV) peak of 378 nm exhibited a red-shifted phenomenon with Fe-doping by photoluminescence (PL) emission. Furthermore, FZO photodetectors (PDs) based on metal–semiconductor–metal (MSM) structure were successfully manufactured through a photolithography procedure for UV detection. Results revealed that compared with pure ZnO NRs, FZO NRs exhibited a remarkable photosensitivity for UV PD applications and a fast rise/decay time. The sensitivities of prepared pure ZnO and FZO PDs were 43.1, and 471.1 for a 3 V applied bias and 380 nm UV illumination, respectively.

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Ultraviolet photodetector based on TiO2 nanoparticles/porous silicon hetrojunction

Cited by 47 publications

References 17 publications

Low-cost photodetector architectures fabricated at room-temperature using nano-engineered silicon wafer and sol-gel TiO2 – based heterostructures

Low-cost photodetector architectures fabricated at room-temperature using nano-engineered silicon wafer and sol-gel TiO2 – based heterostructures

Nanosilicon-Based Composites for (Bio)sensing Applications: Current Status, Advantages, and Perspectives

Fabrication of Ultraviolet Photodetectors Based on Fe-Doped ZnO Nanorod Structures

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