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

Zeynep Orhan

doi:10.17798/bitlisfen.1902867

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

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.

Keywords

Thanks

The author thanks Dr. Berrak Ertuğrul, Dr. Elif Temur, and Dr. Hülya Öztürk Doğan for their support in synthesizing the materials.

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Details

Primary Language

English

Subjects

Photonics, Optoelectronics and Optical Communications

Journal Section

Research Article

Authors

Zeynep Orhan ^*
0000-0002-2593-4307
Türkiye

Publication Date

September 30, 2026

Submission Date

March 5, 2026

Acceptance Date

June 22, 2026

Published in Issue

Year 2026 Volume: 15 Number: 3

DOI

https://doi.org/10.17798/bitlisfen.1902867

IZ

https://izlik.org/JA59HS38SK

Cite

RIS / Bibtex

APA

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, 15(3), 1405-1416. https://doi.org/10.17798/bitlisfen.1902867

AMA

1.Orhan Z. Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 2026;15(3):1405-1416. doi:10.17798/bitlisfen.1902867

Chicago

Orhan, Zeynep. 2026. “Synthesis of Au Poly(1,2-Diphenylethylenediamine) N-Si Hybrid Structures for Self-Powered UV Detection”. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 15 (3): 1405-16. https://doi.org/10.17798/bitlisfen.1902867.

EndNote

Orhan Z (September 1, 2026) Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 15 3 1405–1416.

IEEE

[1]Z. Orhan, “Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection”, Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, vol. 15, no. 3, pp. 1405–1416, Sept. 2026, doi: 10.17798/bitlisfen.1902867.

ISNAD

Orhan, Zeynep. “Synthesis of Au Poly(1,2-Diphenylethylenediamine) N-Si Hybrid Structures for Self-Powered UV Detection”. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi 15/3 (September 1, 2026): 1405-1416. https://doi.org/10.17798/bitlisfen.1902867.

JAMA

1.Orhan Z. Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 2026;15:1405–1416.

MLA

Orhan, Zeynep. “Synthesis of Au Poly(1,2-Diphenylethylenediamine) N-Si Hybrid Structures for Self-Powered UV Detection”. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, vol. 15, no. 3, Sept. 2026, pp. 1405-16, doi:10.17798/bitlisfen.1902867.

Vancouver

1.Zeynep Orhan. Synthesis of Au/poly(1,2-diphenylethylenediamine)/n-Si Hybrid Structures for Self-Powered UV Detection. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 2026 Sep. 1;15(3):1405-16. doi:10.17798/bitlisfen.1902867