The light detection performance of Al/VNPB/n-Si Schottky photodetectors for a wide-range spectrum
Küçük Resim Yok
Tarih
2026
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A novel organic-inorganic Schottky photodetector incorporating a N4, N4 '-di(Naphthalen-1-yl)-N4, N4 '-bis(4-vinylphenyl)biphenyl-4,4 '-diamine (VNPB) thin film interlayer was fabricated and systematically characterized. The Al/VNPB/n-Si Schottky photodetectors were investigated using UV-Vis spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM), revealing strong visible light absorption and high crystallinity. Electrical measurements under varying illumination intensities demonstrated enhanced rectification and significant photocurrent generation, attributed to thermionic emission and efficient photocarrier formation. Under solar illumination (20-100 mW/cm(2)), the device demonstrated strong photocurrent generation, high photosensitivity (22.05-80.58), responsivity up to 2.18 A/W, and detectivity values on the order of 10(10) Jones, confirming efficient low-noise photodetection. The device exhibited high photosensitivity, responsivity, and specific detectivity across a broad spectral range (351-1600 nm), with peak performance at 600 nm, where a maximum responsivity of 0.0366 A/W, an external quantum efficiency of similar to 75%, and a detectivity of 6.11 x 10(9) Jones were achieved. In addition, strong near-infrared performance was observed at 1000 nm, with a photosensitivity of 4.85 and a detectivity of 5.76 x 10(9) Jones. Compared to oxide-based photodetectors, the Al/VNPB/n-Si architecture demonstrated superior optoelectronic performance, positioning VNPB as a promising interfacial material for next-generation photodetection technologies.
Açıklama
Anahtar Kelimeler
Vnpb, Schottky Photodetectors, Photosensitivity, Specific Detectivity
Kaynak
Optical Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Cilt
176
