Role of interface defect in hot carriers extraction at graphene-metal contact

2018 ◽  
Author(s):  
Sergey G. Menabde ◽  
Min Seok Jang ◽  
Ju Yeong Kim ◽  
Sung Yoon Min
Keyword(s):  
Metal Contact ◽  
Hot Carriers ◽  
Interface Defect

scholarly journals Palmoplantar Pustulosis and Allergies: A Systematic Review

2019 ◽  
pp. 105-110 ◽  
Author(s):  
Alexandra M.G. Brunasso Vernetti ◽  
Matteo Puntoni ◽  
Cesare Massone
Keyword(s):  
Systematic Review ◽  
Web Of Science ◽  
Systematic Search ◽  
Trigger Factor ◽  
Metal Contact ◽  
Metal Allergy ◽  
Palmoplantar Pustulosis ◽  
Reactive Process

Background: In 2007 the International Psoriasis Council considered palmoplantar pustulosis (PPP) a condition separate from psoriasis, and several authors maintain that PPP is a reactive process to metal contact allergies independent from psoriasis. Objectives: To evaluate the frequency of allergies and psoriasis in patients with PPP and to determine the role of allergens in PPP. Methods: A systematic search of the English databases (PubMed and Web of Science) from January 1964 to August 2018 to identify all patients affected by PPP and allergies and/or psoriasis. Results: In total, 16 publications describing a total of 519 patients with PPP were evaluated and 122 cases of concomitant PPP and metal allergy were found. The frequency of allergies among patients with PPP was 22.7%; between the identified allergens, 84.3% of cases correspond to metal allergies. In 65.1% of metal allergies, an improvement in PPP was seen after withdrawal of contact. The concomitant presence of psoriasis was recorded in 18% of the cases. Conclusion: There is some evidence to support the association of PPP with metal allergies but also with psoriasis, suggesting the role of metal allergens as a trigger factor in patients with PPP.

scholarly journals Controlling luminescent silicon nanoparticle emission produced by nanosecond pulsed laser ablation: role of interface defect states and crystallinity phase

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112520-112526 ◽  
Author(s):  
T. G. Ulusoy Ghobadi ◽  
A. Ghobadi ◽  
T. Okyay ◽  
K. Topalli ◽  
A. K. Okyay
Keyword(s):  
Laser Ablation ◽  
Silicon Nanoparticles ◽  
Pulsed Laser ◽  
Blue Emission ◽  
Pulsed Laser Ablation ◽  
Defect States ◽  
Nanosecond Pulsed Laser ◽  
Interface Defect ◽  
Nanoparticle Emission

In this study, we provide a systematic study on the origin of green and blue emission from luminescent silicon nanoparticles (Si-NPs) synthesized in water using a nanosecond pulsed laser ablation methodology.

Hot carriers and excitation of Si/SiOx interface defect photoluminescence in Si nanocrystallites

2003 ◽  
Vol 340-342 ◽  
pp. 1113-1118 ◽  
Author(s):  
T.V. Torchynska ◽  
A. Diaz Cano ◽  
M. Morales Rodriguez ◽  
L.Yu. Khomenkova
Keyword(s):  
Hot Carriers ◽  
Interface Defect ◽  
Si Nanocrystallites

scholarly journals Interface defect-assisted phonon scattering of hot carriers in graphene

2017 ◽  
Vol 96 (7) ◽  
Author(s):  
Sergey G. Menabde ◽  
Hyunwoo Cho ◽  
Namkyoo Park
Keyword(s):  
Phonon Scattering ◽  
Hot Carriers ◽  
Interface Defect

The Role of Coherence in the Photogeneration Process of Hot Carriers

1996 ◽  
pp. 199-204
Author(s):  
T. Kuhn ◽  
F. Rossi ◽  
A. Leitenstorfer ◽  
A. Lohner ◽  
T. Elsaesser ◽  
...  
Keyword(s):  
Hot Carriers

scholarly journals Lateral Structured Phototransistor Based on Mesoscopic Graphene/Perovskite Heterojunctions

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 641
Author(s):  
Dahua Zhou ◽  
Leyong Yu ◽  
Peng Zhu ◽  
Hongquan Zhao ◽  
Shuanglong Feng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Layer ◽  
Hybrid Film ◽  
Luminescence Spectra ◽  
Charge Transfer Process ◽  
Hot Carriers ◽  
Halide Perovskites ◽  
Specific Detectivity ◽  
High Optical Absorption

Due to their outstanding optical properties and superior charge carrier mobilities, organometal halide perovskites have been widely investigated in photodetection and solar cell areas. In perovskites photodetection devices, their high optical absorption and excellent quantum efficiency contribute to the responsivity, even the specific detectivity. In this work, we developed a lateral phototransistor based on mesoscopic graphene/perovskite heterojunctions. Graphene nanowall shows a porous structure, and the spaces between graphene nanowall are much appropriated for perovskite crystalline to mount in. Hot carriers are excited in perovskite, which is followed by the holes’ transfer to the graphene layer through the interfacial efficiently. Therefore, graphene plays the role of holes’ collecting material and carriers’ transporting channel. This charge transfer process is also verified by the luminescence spectra. We used the hybrid film to build phototransistor, which performed a high responsivity and specific detectivity of 2.0 × 103 A/W and 7.2 × 1010 Jones, respectively. To understand the photoconductive mechanism, the perovskite’s passivation and the graphene photogating effect are proposed to contribute to the device’s performance. This study provides new routes for the application of perovskite film in photodetection.

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