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<p>Optical detectors are increasingly being researched to improve their optical properties, which has become the focus of researchers in this field. In this study, two samples of PSi/AgNWs photodetectors were manufactured in two steps. The first step involved electrochemical etching to produce two PSi samples, and in the second step, AgNWs were synthesized using a polyol method. After completing the deposition process, which included spraying the AgNWs and manufacturing the PSi/AgNWs, their electrical and optical properties were studied through FESEM, UV-Vis, and energy dispersion spectroscopy. The morphological results of the two PSi samples showed a high density of porous, with 3093 porous, an average size of 1.799&#xa0;μm, and Si content of 63.42% for one sample, and 1143 porous with an average size of 629.9&#xa0;nm and Si content of 75.27% for the other. Meanwhile, the two PSi/AgNWs samples revealed the presence of Si (3.69%), Ag (96.31%), and Si (12.42%), Ag (87.58%) respectively. Both PSi samples exhibited resistance values of 1.084 and 1.554 Ω, along with corresponding conductance values of 0.9225 and 0.643&#xa0;S, respectively. In the case of two samples of PSi/AgNWs, the I-V characteristics yielded resistance values of 0.4254 and 0.1047 Ω, accompanied by conductance values of 2.350 and 9.551, respectively. The I-T characteristics showed that the photocurrent of the two samples of PSi detectors was 20 and 5 µA, respectively. The first PSi/AgNWs sample exhibited photocurrents of 2, 10, and 20&#xa0;mA, respectively. Meanwhile, the second PSi/AgNWs photodetector sample showed photocurrents of 1, 6, and 15&#xa0;mA, respectively. In comparison to the PSi-based detector, the PSi/AgNWs detector exhibits approximately ten times higher sensitivity due to the coating of PSi with AgNWs layers. The effect of the porous count on increasing detection efficiency and sensitivity is evident. This study indicates the role of AgNWs and porosity density in controlling further improvements, contributing to the development of various optical detectors. These results were compared with previous studies, demonstrating that AgNWs can be used in the manufacture of high-performance one-dimensional hybrid photodetectors with increased sensitivity and spectral-selective photodetection caused by local surface plasmon resonance.</p>

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Improving the electrical and optical properties of a photodetector using silver nanoparticles deposited on porous silicon

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Hasan Bakheet Jasim,
  • Hayder A. Naser,
  • Naser M. Ahmed

摘要

Optical detectors are increasingly being researched to improve their optical properties, which has become the focus of researchers in this field. In this study, two samples of PSi/AgNWs photodetectors were manufactured in two steps. The first step involved electrochemical etching to produce two PSi samples, and in the second step, AgNWs were synthesized using a polyol method. After completing the deposition process, which included spraying the AgNWs and manufacturing the PSi/AgNWs, their electrical and optical properties were studied through FESEM, UV-Vis, and energy dispersion spectroscopy. The morphological results of the two PSi samples showed a high density of porous, with 3093 porous, an average size of 1.799 μm, and Si content of 63.42% for one sample, and 1143 porous with an average size of 629.9 nm and Si content of 75.27% for the other. Meanwhile, the two PSi/AgNWs samples revealed the presence of Si (3.69%), Ag (96.31%), and Si (12.42%), Ag (87.58%) respectively. Both PSi samples exhibited resistance values of 1.084 and 1.554 Ω, along with corresponding conductance values of 0.9225 and 0.643 S, respectively. In the case of two samples of PSi/AgNWs, the I-V characteristics yielded resistance values of 0.4254 and 0.1047 Ω, accompanied by conductance values of 2.350 and 9.551, respectively. The I-T characteristics showed that the photocurrent of the two samples of PSi detectors was 20 and 5 µA, respectively. The first PSi/AgNWs sample exhibited photocurrents of 2, 10, and 20 mA, respectively. Meanwhile, the second PSi/AgNWs photodetector sample showed photocurrents of 1, 6, and 15 mA, respectively. In comparison to the PSi-based detector, the PSi/AgNWs detector exhibits approximately ten times higher sensitivity due to the coating of PSi with AgNWs layers. The effect of the porous count on increasing detection efficiency and sensitivity is evident. This study indicates the role of AgNWs and porosity density in controlling further improvements, contributing to the development of various optical detectors. These results were compared with previous studies, demonstrating that AgNWs can be used in the manufacture of high-performance one-dimensional hybrid photodetectors with increased sensitivity and spectral-selective photodetection caused by local surface plasmon resonance.