Improved Photoelectric Properties of ZnO1-x/Graphene Heterostructures

2018 ◽  
Vol 768 ◽  
pp. 187-192
Author(s):  
Jian Wen ◽  
Xiu Li Fu ◽  
Zhao Xian Liu ◽  
Zhi Jian Peng
Keyword(s):  
Zinc Oxide ◽  
Magnetron Sputtering ◽  
Visible Light ◽  
Near Infrared ◽  
Infrared Region ◽  
Infrared Detection ◽  
Current Gain ◽  
Radio Frequency Magnetron Sputtering ◽  
Photoelectric Properties ◽  
Near Infrared Region

In this work, the photoelectric properties of ZnO1-x/graphene heterostructures were investigated. Such ZnO1-x/graphene heterostructures were constructed from non-stoichiometric zinc oxide (ZnO1-x) film and graphene by first depositing ZnO1-x layer through radio frequency magnetron sputtering onto silicon wafers with SiO2 layer and then transferring graphene via a wet method. It was revealed that such heterostructures could have improved photoelectric properties. Compared with ZnO1-x films, the absorbance of the ZnO1-x/graphene heterostructures in visible and near-infrared region was enhanced; and due to the high conductivity of graphene, the photocurrent was significantly enhanced both in dark and under irradiation of a 700 nm light. By calculating the absolute current gain, it was revealed that the fabricated ZnO1-x/graphene heterostructures would have a higher current gain. Thus, such ZnO1-x/graphene heterostructures would be promisingly applied in visible light to near-infrared detection devices.

The Research of Modulation Period on Photoelectric Properties of Ti/TiN Multilayer Films

2010 ◽  
Vol 126-128 ◽  
pp. 935-939 ◽  
Author(s):  
Min Hu ◽  
Ying Liu
Keyword(s):  
Interfacial Layer ◽  
Near Infrared ◽  
Infrared Region ◽  
Multilayer Films ◽  
Optimum Thickness ◽  
Dc Magnetron Sputtering ◽  
Near Infrared Reflectance ◽  
Photoelectric Properties ◽  
Number Of Layers ◽  
Near Infrared Region

A series of Ti/TiN multilayer films were prepared by reactive DC magnetron sputtering onto Si(111) substrates. The resistivity and optical reflectance of these thin films were measured as a function of the modulated, multilayered thickness and the number of layered structures. The resistivity decreased with increase in the number of layers in the film up to 4 layers. The reflectance in the near infrared region increased with increase in layer thickness but after a certain thickness, the change in reflectance was minimal. An optimum thickness of 25 nm for the modulated film realized a maximum of 0.829 in the near infrared reflectance. With the number of layers greater than 15, an interfacial layer of Ti2N was observed.

scholarly journals Optical properties of CdO films prepared by DC planar magnetron sputtering

2014 ◽  
pp. 9-12
Keyword(s):  
Optical Properties ◽  
Magnetron Sputtering ◽  
Near Infrared ◽  
Infrared Region ◽  
Direct Band Gap ◽  
Glass Substrates ◽  
Planar Magnetron ◽  
Direct Band ◽  
Near Infrared Region ◽  
Cdo Films

CdOfilms have been produced on glass substrates by DC planar magnetron sputtering technique in Ar and O2 gases 1:4 and distance 6cm between cathode and anode and thickness 174 nm. It is observed from optical properties that the films possess transmittance 80% in visible and near infrared region of spectrum and direct band gap values in the rang 2.31-2.4 e V

Novel up-conversion photoluminescent materials: noncoherent excitation by near-infrared sunlight

2018 ◽  
Vol 6 (12) ◽  
pp. 3074-3078 ◽  
Author(s):  
Cheng Chen ◽  
Ting Cao ◽  
Lijian Liu
Keyword(s):  
Visible Light ◽  
Ultraviolet Light ◽  
Near Infrared ◽  
Infrared Region ◽  
Near Infrared Region ◽  
Photoluminescent Materials

Oligomers as fluorescent macromolecules can efficiently convert the near-infrared region of sunlight into visible light with assistance from ultraviolet light.

scholarly journals Broadband Detection Based on 2D Bi2Se3/ZnO Nanowire Heterojunction

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 169
Author(s):  
Zhi Zeng ◽  
Dongbo Wang ◽  
Jinzhong Wang ◽  
Shujie Jiao ◽  
Donghao Liu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface State ◽  
Near Infrared ◽  
Infrared Region ◽  
Band Alignment ◽  
Type I ◽  
Zno Nanowire ◽  
Heterojunction Device ◽  
Near Infrared Region ◽  
Broadband Detection

The investigation of photodetectors with broadband response and high responsivity is essential. Zinc Oxide (ZnO) nanowire has the potential of application in photodetectors, owing to the great optoelectrical property and good stability in the atmosphere. However, due to a large number of nonradiative centers at interface and the capture of surface state electrons, the photocurrent of ZnO based photodetectors is still low. In this work, 2D Bi2Se3/ZnO NWAs heterojunction with type-I band alignment is established. This heterojunction device shows not only an enhanced photoresponsivity of 0.15 A/W at 377 nm three times of the bare ZnO nanowire (0.046 A/W), but also a broadband photoresponse from UV to near infrared region has been achieved. These results indicate that the Bi2Se3/ZnO NWAs type-I heterojunction is an ideal photodetector in broadband detection.

Carbazole-Functionalized Poly(phenyl isocyanide)s: Synergistic Electrochromic Behaviors in the Visible Light Near-Infrared Region

2021 ◽  
Author(s):  
Yuehui Zhai ◽  
Yan Wang ◽  
Xuanbo Zhu ◽  
Zhen Xing ◽  
Shiying Qi ◽  
...  
Keyword(s):  
Visible Light ◽  
Near Infrared ◽  
Infrared Region ◽  
Near Infrared Region

Ligand Influence Versus Electronic Configuration of d-metal Ion in Determining the Fate of NIR Emission from LnIII Ions: A Case Study with CuII, NiII and ZnII Complexes.

2021 ◽  
Author(s):  
Abhineet Verma ◽  
Sk Saddam Hossain ◽  
Sailaja S Sunkari ◽  
Joseph Reibenspies ◽  
Satyen Saha
Keyword(s):  
Metal Ion ◽  
Selection Rule ◽  
Near Infrared ◽  
Electronic Configuration ◽  
Infrared Region ◽  
Direct Excitation ◽  
Characteristic Emission ◽  
Nir Emission ◽  
Near Infrared Region

Lanthanides (LnIII) are well known for their characteristic emission in the Near-Infrared Region (NIR). However, direct excitation of lanthanides is not feasible as described by Laporte’s parity selection rule. Here,...

Low-Band gap Conjugated Polymers with Strong Absorption in the Second Near-Infrared Region Based on Diketopyrrolopyrrole-Containing Quinoidal Units

2021 ◽  
Author(s):  
Xuxia Zhao ◽  
Houji Cai ◽  
Yunfeng Deng ◽  
Yu Jiang ◽  
Zhongli Wang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Near Infrared ◽  
Infrared Region ◽  
Strong Absorption ◽  
Low Band Gap ◽  
Near Infrared Region

Highly luminescent InP-In(Zn)P/ZnSe/ZnS core/shell/shell colloidal quantum dots with tunable emission synthesized based on growth-doping

2021 ◽  
Author(s):  
Cong Shen ◽  
Yan Qing Zhu ◽  
Zixiao Li ◽  
Jingling Li ◽  
Hong Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Infrared Region ◽  
Colloidal Quantum Dots ◽  
High Quality ◽  
Promising Alternative ◽  
Lower Toxicity ◽  
Near Infrared Region ◽  
Inp Quantum Dots ◽  
Tunable Emission

InP quantum dots (QDs) are considered as the most promising alternative to Cd-based QDs with the lower toxicity and emission spectrum tunability ranging from visible to near-infrared region. Although high-quality...

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