Статья по физике на тему "Use of Nanotechnology for photosensitive structures metal-dielectric-semiconductor"

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USE OF NANOTECHNOLOGY FOR PHOTOSENSITIVE STRUCTURES METAL-DIELECTRIC-SEMICONDUCTOR
(For example: Au-oxide-GaP nanostructure)
 
D.Melebayev, head of a department, candidate of science
 
Institute of Sun Energy,
Turkmenistan Academy of Scienses

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Photosensitive MIS nanostructures Au-Ga2O3(Fe)-n-GaP were made by chemical deposition method. Photoelectric and electric properties of this structures were researched. The oxide layer Ga2O3(Fe) morphology and structure were investigated on transmission and atomic-force electron microscopes. New regularity were discovered in visible (2-3 eV) and ultraviolet (UV) (5-6.2 eV) spectral regions. A spectral maximum was observed in long-wave spectral region (hνm = 2.35 eV). This accounts for iron nanooxide formation on the interface semiconductor-dielectric with energy gap width Eg ≈ 2.2 eV (300 K). In UV region at hν > 5.1 eV huge photosensitivity was discovered, this accounts for avalanche multiplication in a space-charge layer and properties of nanolayers of the metal Au and of the high energy-gap oxide Ga2O3(Fe). In a oxide layer nanowires with iron oxide were discovered, 25-45 nm in diameter and it's length was 10-12 μm. Typical value of structure current photosensitivity nearly hν = 6.0 eV achieves ~0.25 A/W under zero voltage bias. There's demonstrate that short-wave UV radiation is strongly absorbed in nanowires. This effects in photosensitive MIS nanostructures give an opportunity the new types of UV radiation photodetectors for practical application.

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Nanostructures Metal-Dielectric-Semiconductor and theirs Energy Diagram
Конструкция наноструктур металл-диэлектрик-полупроводник,
и их энергетическая диаграмма

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Nanotechnology of
GaP MDS
Nanostructures

Нанотехнология
GaP MDS
наноструктур

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The New Results Were Received on
a Transmission Electron Microscope

Новые данные, полученные на просвечивающем электронном микроскопе

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Spectrum of Au-oxide-n-GaP nanostructure in ultraviolet range

Спектр наноструктуры Au-окисел-n-GaP в ультрафиолетовом диапазоне
New Nanotechnologies
Новые нанотехнологии

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Threedimensional Topography of a Structure
(The Nanoclusters Generation)
Трехмерная топография структуры
(появление нанокластеров)

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The construction of a Photodetector
Конструкция фотодетектора

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A Laboratory Pattern of UV Photodetector

Лабораторный образец УФ фотодетектора

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THANK YOU FOR YOUR ATTENTION!

БЛАГОДАРЮ ЗА ВНИМАНИЕ!