scholarly journals Analysis of Quantum Confinement and Carrier Transport of Nano-Transistor in Quantum Mechanics

2020 ◽  
Author(s):  
Aynul Islam ◽  
Anika Tasnim Aynul
Keyword(s):  
Quantum Mechanics ◽  
Quantum Confinement ◽  
Carrier Transport

A review of quantum transport in field-effect transistors

2021 ◽  
Author(s):  
David K Ferry ◽  
Josef Weinbub ◽  
Mihail Nedjalkov ◽  
Siegfried Selberherr
Keyword(s):  
Quantum Mechanics ◽  
Quantum Transport ◽  
Quantum Confinement ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Field Effect Transistors ◽  
Quantum Effects ◽  
The Past ◽  
Effect Transistor

Abstract Confinement in small structures has required quantum mechanics, which has been known for a great many years. This leads to quantum transport. The field-effect transistor has had no need to be described by quantum transport over most of the century for which it has existed. But, this has changed in the past few decades, as modern versions tend to be absolutely controlled by quantum confinement and the resulting modifications to the normal classical descriptions. In addition, correlation and confinement lead to a need for describing the transport by quantum methods as well. In this review, we describe the quantum effects and the method of treating by various approaches to quantum transport.

Carrier Transport and Luminescence Properties of Nanocomposites of Poly[2-methoxy-5-(2-ethyl hexyloxy)-p-phenylene vinylene] and Dehydrated Nanotubes Titanic Acid

2007 ◽  
Vol 7 (12) ◽  
pp. 4318-4321
Author(s):  
Ting Zhang ◽  
Zheng Xu ◽  
Ran Liu ◽  
Feng Teng ◽  
Yongsheng Wang ◽  
...  
Keyword(s):  
Outer Surface ◽  
Quantum Confinement ◽  
Carrier Mobility ◽  
Carrier Transport ◽  
Phenylene Vinylene ◽  
Antenna Effect ◽  
Recombination Efficiency ◽  
Luminescence Efficiency ◽  
Exciton Recombination ◽  
Interchain Interactions

The carrier transport capability and luminescence efficiency of poly(2-methoxy-5-(2-ethyl hexyloxy)-p-phenylene vinylene) (MEH-PPV) films are enhanced by doping with dehydrated nanotubed titanic acid (DNTA). MEH-PPV molecules, either wrapped on the outer surface of or encapsulated into DNTA pores, have a more open, straighter conformation than undoped molecules, which induces a longer conjugated backbone and stronger interchain interactions, thereby, enhancing carrier mobility. MEH-PPV molecules within DNTA pores have higher exciton recombination efficiency owing to quantum confinement and the antenna effect.

scholarly journals Perovskite superlattices with efficient carrier dynamics

2021 ◽  
Author(s):  
Sheng Xu ◽  
Yusheng Lei ◽  
Yuheng Li ◽  
Chengchangfeng Lu ◽  
Qizhang Yan ◽  
...  
Keyword(s):  
Quantum Confinement ◽  
Carrier Transport ◽  
Relaxation Mechanism ◽  
Open Circuit ◽  
Carrier Dynamics ◽  
Metal Halide ◽  
Three Dimensions ◽  
Electrical Performance ◽  
Thickness Direction ◽  
Low Dimensional

Abstract Compared with their three-dimensional counterparts, low-dimensional metal halide perovskites with periodic inorganic/organic structures have shown promising stability and hysteresis-free electrical performance, which paves the way for next-generation optoelectronic devices. However, when integrated in devices, they have relatively limited efficiencies because devices usually require carrier transport through the film thickness direction. In conventionally grown single crystals, the carrier transport in the thickness direction is hindered by the insulating organic spacers. In addition, the strong quantum confinement from the organic spacers limits the generation and transport of free carriers. The carrier dynamics is further compromised by the presence of grain boundaries in polycrystals. Here, we report a low-dimensional metal halide perovskite superlattice with efficient carrier transport in three dimensions by epitaxial growth. Epitaxy on a slightly lattice-mismatched substrate compresses the organic spacers in the superlattice, which weakens the quantum confinement and further improves carrier dynamics. The performance of a low-dimensional perovskite superlattice solar cell has been certified under the quasi-steady state for the first time. Moreover, the device shows an unusually high open-circuit voltage, due to a unique intra-band exciton relaxation mechanism.

scholarly journals Quantum Confinement Effect in Amorphous In–Ga–Zn–O Heterojunction Channels for Thin-Film Transistors

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1935 ◽  
Author(s):  
Daichi Koretomo ◽  
Shuhei Hamada ◽  
Yusaku Magari ◽  
Mamoru Furuta
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Quantum Confinement ◽  
Carrier Transport ◽  
Simulation Analysis ◽  
Quantum Confinement Effect ◽  
Energy Band Diagram ◽  
Confinement Effect ◽  
Gate Insulator ◽  
Conduction Band Offset

Electrical and carrier transport properties in In–Ga–Zn–O thin-film transistors (IGZO TFTs) with a heterojunction channel were investigated. For the heterojunction IGZO channel, a high-In composition IGZO layer (IGZO-high-In) was deposited on a typical compositions IGZO layer (IGZO-111). From the optical properties and photoelectron yield spectroscopy measurements, the heterojunction channel was expected to have the type–II energy band diagram which possesses a conduction band offset (ΔEc) of ~0.4 eV. A depth profile of background charge density indicated that a steep ΔEc is formed even in the amorphous IGZO heterojunction interface deposited by sputtering. A field effect mobility (μFE) of bottom gate structured IGZO TFTs with the heterojunction channel (hetero-IGZO TFTs) improved to ~20 cm2 V−1 s−1, although a channel/gate insulator interface was formed by an IGZO−111 (μFE = ~12 cm2 V−1 s−1). Device simulation analysis revealed that the improvement of μFE in the hetero-IGZO TFTs was originated by a quantum confinement effect for electrons at the heterojunction interface owing to a formation of steep ΔEc. Thus, we believe that heterojunction IGZO channel is an effective method to improve electrical properties of the TFTs.

Computational Theories Used in the Study of Quantum Dots

2021 ◽  
pp. 113-144
Keyword(s):  
Quantum Dots ◽  
Quantum Mechanics ◽  
Electrical Properties ◽  
Molecular Mechanics ◽  
Quantum Confinement ◽  
Comprehensive Analysis ◽  
Optical And Electrical Properties ◽  
Computational Approaches ◽  
Commercial Applications

Quantum dots (QDs) are intriguing semiconductors with remarkable quantum confinement, optical and electrical properties which avails for various industrial and commercial applications to revolutionize our world. However, their optimal utilization hinges on the understanding of their properties and computational theories are imperative to explore both existing and new QDs properties. This chapter gives a comprehensive analysis of molecular mechanics and quantum mechanics computational approaches used in the study of the QDs properties.

Quantum confined colloidal nanorod heterostructures for solar-to-fuel conversion

2016 ◽  
Vol 45 (14) ◽  
pp. 3781-3810 ◽  
Author(s):  
Kaifeng Wu ◽  
Tianquan Lian
Keyword(s):  
Quantum Confinement ◽  
Carrier Transport ◽  
Axial Direction ◽  
Fuel Conversion ◽  
Long Distance ◽  
One Dimensional ◽  
Quantum Confined

Colloidal one-dimensional (1D) semiconductor nanorods (NRs) offer the opportunity to simultaneously maintain quantum confinement in radial dimensions for tunable light absorptions and bulk like carrier transport in the axial direction for long-distance charge separations.

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