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

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-01 DOI:10.1117/1.JNP.17.036009

N. Obaid, A. Al-Nafiey, G. Al-Dahash

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引用次数: 0

Abstract

Abstract. 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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P3HT−G/MoS2纳米复合材料薄膜在光电探测器中的合成与表征

摘要首次通过脉冲激光烧蚀（PLA）方法制备了聚（3-己基噻吩-2,5-二基）（P3HT）-石墨烯/二硫化钼（MoS2）纳米复合材料，使用液滴铸造技术将不同数量的激光脉冲沉积在多孔硅（PSi）衬底上。通过电化学蚀刻P型硅片制备了纳米晶体PSi薄膜。对其光学性能、透射电子显微镜（TEM）和光电探测器的性能进行了研究。光学测量证实，随着石墨烯和MoS2的激光脉冲数量的增加，能隙从2.03 eV减小到1.87 eV。能隙的减小归因于石墨烯及其与钼的结合的增加。由于混合材料的电导率较高，MoS2导致带隙减小。根据TEM图像，发现颗粒的平均尺寸在3.1和20.8nm之间，这取决于具有半球形颗粒形状的石墨烯和MoS2的激光脉冲数量的增加。Ag / PSi / P3HT − G / 二硫化钼 / 制备了所有样品的Ag光电探测器，以表征石墨烯和MoS2的激光脉冲数对光电探测器性能的影响。比响应、比检测和量子效率的最大值为0.35 A. / W、 5.1 × 1012 厘米 Hz1/2 W − 1和49.2% A. / W、 3.3 × 1012 厘米 Hz1/2 W − 1和38.9% − G / MoS2 NPS。结果表明，PLA方法成功地制备了P3HT − G / MoS2纳米复合材料，并且所得产物在响应度、探测率和量子效率方面表现出高值。此外，纳米复合材料可能增强了PSi光电探测器的相同参数。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.