Low‐Power Photodetectors Based on PVA‐Modified Reduced Graphene Oxide Hybrid Solutions

Shih, Yi‐Shan; Li, Wei‐Chen; Shen, Jun-Hao; Chu, Shao‐Yu; Uen, Wu‐Yih; Lee, Hsin‐Ying; Lin, Gong‐Ru; Chen, Yu‐Cheng; Tu, Wei‐Chen

doi:10.1002/marc.202100854

Cited by 11 publications

(6 citation statements)

References 67 publications

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“…By modifying the rGO film with hydrophilic polymers, Shih et al 55 demonstrated a feasible method for designing surface homogeneity and improving photodetector performance. The on/off ratio of the PVA/rGO photodetector is 3.5 times higher than that of the rGO photodetector, and the detective improves by 53% even when the photodetector is operated at a low bias of 0.3 V.…”

Section: Graphene-based Photodetectorsmentioning

confidence: 99%

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Graphene/molybdenum disulfide nanocomposites: characterization and optoelectronic application

2023

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The ability to modify and shape the surface of polymer and composite materials is crucial for a number of biological and electronics applications. Molybdenum disulfide (MoS 2 ) and graphene are two-dimensional materials that have distinctive electrical and optical properties that are useful in many optoelectronic applications. The latest applications of graphene∕MoS 2 , as well as heterostructure manufacturing, properties, and applications, are discussed. Heterostructured materials, as opposed to single-component materials, are designed to provide additional functionality or flexibility. Our study focuses on their unique traits and capabilities, as well as applications, notably in the field of photodetector technology.

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Section: Graphene-based Photodetectorsmentioning

confidence: 99%

“…By modifying the rGO film with hydrophilic polymers, Shih et al 55 . demonstrated a feasible method for designing surface homogeneity and improving photodetector performance.…”

Section: Photodetectors Based On Two Dimensional Materialsmentioning

confidence: 99%

Graphene/molybdenum disulfide nanocomposites: characterization and optoelectronic application

2023

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“…There have been numerous realizations using graphene, GO or RGO as the active photoactive layer in photodetectors [24][25][26][27][28]. Photodetectors based on RGO have been widely studied recently due to their advantages such as low cost and easy synthesis [29]. Inherently weak optical absorption and the short carrier lifetime of graphene has limited its practical application in photodetectors [30].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of self-powered, highly sensitive optoelectronic device based on PVA-rGO nanofibers/n-Si

Yıldırım,

Galehdarvand,

Chenari

et al. 2024

Nanotechnology

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This study provided a promising way to fabricate low-cost and high-performance PVA-RGO nanofibers/n-Si heterojunction photodetector. For this purpose, the hybrid heterojunction with a very-high rectification ratio (2.4×106) was achieved by successfully coating PVA-RGO nanofibers on n-Si wafer by electrospinning method. When the electro-optical analysis of the fabricated heterojunction photodetector under visible light depending on the light intensity, UV and IR lights was examined in detail, it was observed that the photodetector exhibited both self-powered behavior and very high photo-response under each light sources. However, the highest optical performance was obtained under UV (365 nm) originated from PVA-RGO layer and IR (850 nm) light from both interfacial states between PVA-RGO nanofibers and Si and from Si layer. Under 365 nm UV light, the maximum performance values of R, D, ON/OFF ratio, NPDR and EQE (%) were obtained as 688 mA/W, 1.15×1015 Jones, 2.49×106, 8.28×1010 W-1 and 234%, respectively.

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“…The photoresponsivity of the graphene/HfO/Si photodetector is 45.8 A∕W. Moreover, Shih et al 23 demonstrated a practical approach for enhancing surface homogeneity and improving photodetector performance. The PVA/rGO photodetector has an on/off ratio that is 3.5 times higher than that of the rGO photodetector.…”

Section: Introductionmentioning

confidence: 99%

“…The photoresponsivity of the graphene/HfO/Si photodetector is 45.8 A/W. Moreover, Shih et al 23 . demonstrated a practical approach for enhancing surface homogeneity and improving photodetector performance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of thin films of P3HT − G/MoS2 nanocomposites in photodetectors applications

2023

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.The nanocomposite, poly(3-hexylthiophene-2,5-diyl) (P3HT)–graphene/molybdenum disulfide (MoS2), was for the first time fabricated by the pulse laser ablation (PLA) method with different numbers of laser pulses deposited onto a porous silicon (PSi) substrate using the drop-casting technique. Nanocrystalline PSi films are prepared by electrochemical etching of a P-type silicon wafer. The optical properties, transmission electron microscope (TEM), and photodetector properties were studied. Optical measurements confirmed that the energy gap decreases from 2.03 to 1.87 eV with the increasing number of laser pulses for graphene and MoS2. This decrease in the energy gap was attributed to the increase in graphene and its combination with molybdenum. Due to the higher electrical conductivity of the hybrid material, the MoS2 leads to reduce the band gap. From the TEM images, it was found that the average size of the particles was between 3.1 and 20.8 nm depending on increasing the number of laser pulses for both graphene and MoS2 with hemispherical particle shapes. The Ag / PSi / P3HT − G / MoS2 / Ag photodetector was fabricated for all samples prepared to characterize the effect of laser pulses number for graphene and MoS2 on the photodetector performance. The maximum value of the specific response, specific detection, and quantum efficiency was 0.35 A / W, 5.1 × 1012 cm Hz1/2 W − 1, and 49.2% at 900 nm due to the absorption edge of silicon around 0.23 A / W, 3.3 × 1012 cm Hz1/2 W − 1, and 38.9% at 760 nm due to the absorption edge of P3HT − G / MoS2 NPS. The results indicate that the PLA method successfully fabricated the P3HT − G / MoS2 nanocomposites and that the resulting product exhibited high values in responsivity, detectivity, and quantum efficiency. Additionally, it appears that the nanocomposites may have enhanced the same parameters of the PSi photodetector.

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Low‐Power Photodetectors Based on PVA‐Modified Reduced Graphene Oxide Hybrid Solutions

Cited by 11 publications

References 67 publications

Graphene/molybdenum disulfide nanocomposites: characterization and optoelectronic application

Graphene/molybdenum disulfide nanocomposites: characterization and optoelectronic application

Development and characterization of self-powered, highly sensitive optoelectronic device based on PVA-rGO nanofibers/n-Si

Synthesis and characterization of thin films of P3HT − G/MoS2 nanocomposites in photodetectors applications

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