Browsing by Author "Tok, M."

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Citation - Scopus: 1
Environmental Impact of Biobased Materials
(Taylor and Francis, 2024) Kurukavak, Ç.K.; Tok, M.
The materials used to contribute to the development and progress of human life have been used directly, and naturally without any processing in the early ages, but with the increase in human needs in parallel with technological developments, they have started to be processed in accordance with the purpose. Based on this, climate change and environmental pollution, which are the biggest problems of our age, and concerns about the safety of industrial raw materials have enabled the biodegradable and sustainable materials. The advancement of biodegradable biobased plastics with excellent properties is of great interest in last years. In this chapter, the main properties and advantages of the most widely investigated biodegradable biobased plastics (BBPs) in food packaging applications and their environmental impacts are overviewed. Special attention is given to raw materials, energy requirements, and scalability used to produce BBPs for food packaging applications. Different bionanocomposites prepared with incorporation of nanofillers are also explored. This part is constructed on current studies of overview of BBPs about their use as food packaging material. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.
Citation - WoS: 19
Citation - Scopus: 17
High Responsivity and External Quantum Efficiency of Polyoxometalate Interlayered Schottky Type Photodiode Device
(Elsevier Ltd, 2024) Hussaini, A.A.; Tok, M.; Torlak, Y.; Yenel, E.; Durmaz, F.; Kus, M.; Yıldırım, M.
Recently polyoxometalate (POM) compounds have attracted attentions in optoelectronic fields. They can be used as an interlayer between metals and semiconductors to improve the durability, stability, and efficiency of heterojunctions. The addition of polyoxometalate interlayers resulted in high external quantum efficiency and improved optoelectronic parameters, making it functional for photodiode and photodetector applications. In this study, we synthesized Keggin-type α-A-(nBu4N)3[PW9O34(tBuSiOH)3]-0.5MeCN2 polyoxometalate compound and it was characterized by SEM, FT-IR, and 31P NMR. Electrochemical behaviors of the synthesized POM compound were studied by Galvanostat. Polyoxometalate (POM) compound was deposited on n-Si by spin-coating technique. In addition, effects of POM on the electrical properties of the Al/POM/n-Si/Al device were investigated in detail. The photodiode properties were studied with (I–V) and (I-t) measurements under light intensities ranging from 20 to 100 mW/cm2. Responsivity and detectivity of the POM interlayered photodiode have been increased significantly comparing the undoped one. While Al/n-Si has shown 9.35 × 1010 Jones detectivity and 1.881 A/W responsivity at 20 mW/cm2 light power, Al/POM/n-Si photodiode device has exhibited maximum detectivity (1.29 × 1011 Jones) and responsivity (2.937A/W) at 20 mW/cm2 light power. The external quantum efficiency of polyoxometalate interlayered heterojunction varied from 17.03 % to 34.61 % under various wavelengths. The result revealed that Al/POM/n-Si device can be used for optoelectronic applications. © 2023 Elsevier Ltd
Citation - WoS: 6
Citation - Scopus: 5
Modification and Performance Enhancement of P3ht:pcbm Based Organic Solar Cells Incorporated With Phosphorus Doped Carbon Quantum Dots
(Elsevier B.V., 2024) Kırbıyık, Kurukavak, Ç.; Büyükbekar, A.; Tok, M.; Yılmaz, T.; Kuş, M.; Ersöz, M.
We demonstrate a strategy to improve the performance of organic solar cells (OSCs) by phosphorous doped CQDs (P-CQDs). The presence of P-CQDs P3HT:PCBM layer (1 vol% of P-CQDs) enhanced photon harvesting in the UV region and emitting visible light, the PCE was increased from 2.19% to 2.48% and champion device provided a FF of 55.34%. The incorporation of P-CQDs leads to effective photons harvesting ability and collection/transport of charge carriers. The optical absorption and crystallinity of photoactive layer improved with the incorporation of P-CQDs. The larger grain size distribution were obtained with P-CQDs additive helping to better charge extraction. © 2024 Elsevier B.V.