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Journals / Bitlis Eren Üniversitesi Fen Bilimleri Dergisi / 2026 / Volume: 15 Issue: 3

Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection

Zeynep Orhan(ATATÜRK ÜNİVERSİTESİ)0000-0002-2593-4307
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Publication Date
2026-09-30
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Experimental results showed that the device exhibited a high On-Off ratio of 493 at -1.5 V under 395 nm UV light.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, a high-performance hybrid photodiode (Au/PDPEN/n-Si/Al) was fabricated using a poly(1,2-diphenylethylenediamine) (PDPEN) organic interface layer on an n-type silicon (n-Si) substrate, with Al as the contact metal.
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Key Findings & Data:The PDPEN structures exhibited significant absorption in the 300–1100 nm region with a direct band gap of 2.4 eV, consistent with established literature values.
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Conclusion & Impact:Experimental results showed that the device exhibited a high On-Off ratio of 493 at -1.5 V under 395 nm UV light.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Silicon Photodiode · PDPEN · UV Detector

Abstract

In this study, a high-performance hybrid photodiode (Au/PDPEN/n-Si/Al) was fabricated using a poly(1,2-diphenylethylenediamine) (PDPEN) organic interface layer on an n-type silicon (n-Si) substrate, with Al as the contact metal. The PDPEN structures exhibited significant absorption in the 300–1100 nm region with a direct band gap of 2.4 eV, consistent with established literature values. Electrical characterization of the device revealed that the PDPEN layer effectively passivates the silicon surface states, with an ideality factor of 1.93 and a barrier height of 0.711. Photodiode performance was investigated under visible light (100 mW/cm²) and 395 nm UV light (23.5 mW/cm²). Experimental results showed that the device exhibited a high On-Off ratio of 493 at -1.5 V under 395 nm UV light. The maximum external quantum efficiency (EQE) was calculated as 33.27%, the sensitivity (Responsivity) as 0.106 A/W, and the specific detectability (D*) as 6.02 x 10¹¹ Jones. Furthermore, the device's normalized photo-dark current ratio (NPDR) of 2.25 × 10⁸ W⁻¹ demonstrates its superiority in preventing leakage current at the PDPEN interface and in improving signal quality.

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Cite This Article

Orhan, Z. (2026). Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, Volume: 15 Issue: 3. https://doi.org/10.17798/bitlisfen.1902867

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References (50)

  1. F. C. Chen, S. C. Chien and G. L. Cious, “Highly sensitive, low-voltage, organic photomultiple photodetectors exhibiting broadband response,” Applied Physics Letters, vol. 97, no. 10, 2010.
  2. J. W. Levell, M. E. Giardini and I. D. W. Samuel, “A hybrid organic semiconductor/silicon photodiode for efficient ultraviolet photodetection,” Optics Express, vol. 18, no. 4, pp. 3219–3225, 2010.
  3. A. E. Kasapoğlu, Z. Orhan and E. Daş, “Hydrothermally synthesized Sm2O3 nanoparticles for high-performance self-powered photodetectors,” Journal of Physics D: Applied Physics, vol. 58, no. 47, p. 475102, 2025.
  4. M. Palinje and S. K. Sinha, “Performance evaluation of emerging semiconductor devices for low power applications: A review,” Proc. ICETET-SIP, pp. 1–6, 2022.
  5. A. R. Murad et al., “Conducting polymers for optoelectronic devices and organic solar cells: A review,” Polymers, vol. 12, p. 2627, 2020.
  6. M. Erdoğan, Z. Orhan and E. Daş, “Synthesis of electron-rich thiophene triphenylamine based organic material for photodiode applications,” Optical Materials, vol. 128, p. 112446, 2022.
  7. Ş. Çavdar et al., “Optoelectronic properties of triphenylamine organic thin film layered Al/p-Si/TPA/Al heterojunction,” ECS J. Solid State Sci. Technol., vol. 12, no. 4, p. 045001, 2023.
  8. A. M. Nawar et al., “Single oscillator model assessments and dielectric loss of non-crystalline brilliant green films, and characterization of brilliant green/p-Si photodetectors,” Journal of Non-Crystalline Solids, vol. 613, p. 122376, 2023.
  9. S. Kagatikar et al., “Organic and Hybrid Diode Features of an n-Type 1,8-Naphthalimide Derivative,” Journal of Electronic Materials, vol. 52, no. 8, pp. 5401–5411, 2023.
  10. A. K. Palai et al., “Symmetrically functionalized diketopyrrolopyrrole with alkylated thiophene moiety: from synthesis to electronic devices applications,” Journal of Materials Science, vol. 49, no. 12, pp. 4215–4224, 2014.
  11. Y. Zhao, C. Li and L. Shen, “Recent advances on organic–inorganic hybrid perovskite photodetectors with fast response,” InfoMat, vol. 1, no. 2, pp. 164–182, 2019.
  12. Y. Zhang et al., “Wave-interference photonic crystals and space charge engineering enable efficient broadband faint light detection,” Advanced Optical Materials, vol. 13, no. 8, p. 2402772, 2025.
  13. K. B. Brahim et al., “Structural and optical properties of semiconductor organic–inorganic hybrid components,” Inorganic Chemistry Communications, vol. 171, p. 113555, 2025.
  14. A. Calloni et al., “Efficient near infrared absorbers made easy: Benzodithiophene-based donors in tailored organic-inorganic hybrid architectures for near infrared photodetectors,” Optical Materials, p. 117640, 2025.
  15. K. Gurunathan et al., “Electrochemically synthesised conducting polymeric materials for applications towards technology in electronics, optoelectronics and energy storage devices,” Materials Chemistry and Physics, vol. 61, no. 3, pp. 173–191, 1999.
  16. A. Gadikar et al., “Mitigating Illumination Sensitive Dark Current in Inverted Organic Photodiodes by ZnO Defect Passivation,” ACS Applied Materials & Interfaces, 2026.
  17. B. W. Huang and S. H. Hsiao, “Dual-Band Electrochromic Poly(Amide-Imide)’s with Redox-Stable N, N, N’, N’-Tetraphenyl-1,4-Phenylenediamine Segments,” Polymers, vol. 18, no. 1, p. 139, 2026.
  18. M. S. Kim et al., “Self‐Assembled Monolayer Post‐Treatment of Surface Phase‐Flipped Polyelectrolyte for Efficient Selective Charge Transport in Organic Photodiodes,” Advanced Optical Materials, 2026.
  19. D. Aydın et al., “Molecular Design of Ferrocene-Tyrosine Methacrylate Polymers for Enhanced Electrochemical Stability and Optoelectronic Device Applications,” Journal of Inorganic and Organometallic Polymers and Materials, 2025.
  20. F. Hanife and Y. Badali, “Influence of Nd2O3-doped PVA interlayer on the optoelectrical response of a photodiode,” Physica Scripta, vol. 100, no. 5, p. 055950, 2025.
  21. G. Pradeesh et al., “Tunable HCl doping for enhanced charge transport and optoelectronic performance in p-PANI/n-Si diodes,” Emergent Materials, 2025.
  22. A. Ashery, “Ag/MWCNTs-PVA Composite/n-Si/Ag Exhibits a Novel Combination of High Electrical Conductance and Tunable Capacitance in Magnitude and Sign,” ECS Journal of Solid State Science and Technology, 2025.
  23. Y. Azizian-Kalandaragh et al., “Optimizing Schottky barrier diodes: the role of PVC and PVC: molybdenum interlayers in electrophysical properties,” Journal of Materials Science: Materials in Electronics, vol. 36, no. 17, p. 1042, 2025.
  24. C. E. Tsai et al., “Bonding of Shortwave Infrared Organic Photodetectors on Silicon via Conducting Polymer Glue for Image Sensor Application,” ACS Applied Optical Materials, vol. 3, no. 1, pp. 54–63, 2024.
  25. W. Kern, “The evolution of silicon wafer cleaning technology,” Journal of the Electrochemical Society, vol. 137, no. 6, pp. 1887–1892, 1990.
  26. L. Harynski et al., “A facile method for Tauc exponent determination,” Optical Materials, vol. 127, p. 112205, 2022.
  27. J. Y. Kim et al., “A facile method for Tauc exponent and corresponding electronic transitions determination in semiconductors directly from UV–Vis spectroscopy data,” Polymers, vol. 15, no. 7, p. 1626, 2023.
  28. J. H. Tsai et al., “Small band gap conjugated polymers,” Polymer Journal, vol. 41, no. 5, pp. 363–369, 2009.
  29. J. Roncali, “Synthesis and Properties of New Small Band Gap Conjugated Polymers: Methine Bridged Poly(3,4-ethylenedioxypyrrole),” Chemical Reviews, vol. 97, no. 1, pp. 173–206, 1997.
  30. M. H. Mammad et al., “Synthesis, spectroscopy, band gap energy and electrical conductivity of poly(dopamine–co–aniline) copolymer,” Spectrochimica Acta Part A, vol. 308, p. 123712, 2024.
  31. E. H. Rhoderick and R. H. Williams, Metal-Semiconductor Contacts, 2nd ed., Oxford: Clarendon, 1988.
  32. B. Ertuğrul et al., “Electrochemical Fabrication of Pd@Poly[1,2-Diphenylethylenediamine] Electrodes for Ethanol Electro-Oxidation,” Journal of Applied Polymer Science, vol. 142, no. 30, p. e57225, 2025.
  33. C. Hong, Y. Tao, V. K. Dat, and J. H. Kim, "Silicon photodiode-competitive 2D vertical photodetector," npj Flex. Electron., vol. 9, no. 1, art. no. 13, 2025.
  34. S. M. Sze, Physics of Semiconductor Devices, 2nd ed., Wiley, 1981.
  35. Z. Orhan et al., “Synthesis of CuO–graphene nanocomposite material and the effect of gamma radiation on CuO–graphene/p-Si junction diode,” Journal of Materials Science: Materials in Electronics, vol. 31, no. 15, pp. 12715–12724, 2020.
  36. W. Shi et al., “Self-powered Ag2Se/SiO2/Si heterojunctions for ultrafast broadband high-sensitivity photodetection,” Chemical Engineering Journal, p. 166076, 2025.
  37. Z. Orhan et al., “Hydrogen gas sensing and photodetector applications on electrofabricated Pd@ CuCo2O4 nanostructures,” Ceramics International, vol. 50, no. 5, pp. 8472–8479, 2024.
  38. F. Cao et al., “Wide bandgap semiconductors for ultraviolet photodetectors: approaches, applications, and prospects,” Research, vol. 7, p. 0385, 2024.
  39. N. Huo and G. Konstantatos, “Recent progress and future prospects of 2D‐based photodetectors,” Advanced Materials, vol. 30, no. 51, p. 1801164, 2018.
  40. G. Wang et al., “High-performance SWIR photodetector using vertically-aligned Ge/Si core–shell nanowires,” Journal of Materials Science & Technology, 2025.
  41. B. Liu et al., “High-performance self-driven ultraviolet photodetector based on SnO2 pn homojunction,” Optical Materials, vol. 129, p. 112571, 2022.
  42. X. Gong et al., “High-detectivity polymer photodetectors with spectral response from 300 nm to 1450 nm,” Science, vol. 325, no. 5948, pp. 1665–1667, 2009.
  43. K. Ramakrishnan et al., “Review on metal sulfide-based nanostructures for photodetectors: From ultraviolet to infrared regions,” Sensors and Actuators A, vol. 349, p. 114051, 2023.
  44. A. Beling, X. Xie, and J. C. Campbell, "High-power, high-linearity photodiodes," Optica, vol. 3, no. 3, pp. 328–338, Mar. 2016.
  45. J. Heiss and C. J. Brabec, “Carbon photodetectors: the versatility of carbon allotropes,” Advanced Energy Materials, vol. 7, no. 10, p. 1601574, 2017.
  46. M. Jlassi, I. B. Miled, I. Sta, and M. Zouaoui, "Fabrication and characterization of nanostructured cadmium oxide thin films doped with indium by sol–gel spin-coating for CdO (n)/Si (p) heterojunction photodiode applications," Silicon, vol. 17, no. 13, pp. 3033–3044, Jul. 2025.
  47. I. Goykhman et al., “On-Chip Integrated, Silicon–Graphene Plasmonic Schottky Photodetector with High Responsivity and Avalanche Photogain,” Nano Letters, vol. 16, no. 5, pp. 3005–3013, 2016.
  48. Z. Orhan et al., “Investigation of the performance and stability of self-powered polythiophene-based photodiodes under UV and visible light illumination,” Sensors and Actuators A, vol. 378, p. 115853, 2024.
  49. Ş. Karataş and F. Yakuphanoğlu, “Effects of illumination on electrical parameters of Ag/n-CdO/p-Si diode”,Materials Chemistry and Physics, vol. 138, no. 1, pp. 72–77, 2013.
  50. Ş. Karataş and F. Yakuphanoğlu, “Effects of illumination on electrical parameters of Ag/n-CdO/p-Si diode”,Materials Chemistry and Physics, vol. 138, no. 1, pp. 72–77, 2013.