Thermally induced conduction type conversion in <i>n</i>-type InP

Fung, S.; Zhao, Yuchao; Beling, C. D.; Xu, Xin; Sun, Ningning; Sun, Tong; Chen, X. D.

doi:10.1063/1.371057

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Its electronic properties can be easily tuned using different dopants, thus make it show either n- or p-type behavior. Many reports can be found on the electronic behaviors studies of InP films or bulk InP crystals. − However, the electronic transport of 1D InP nanostructures was seldom investigated. Previously, Lieber et al reported the n- or p-type tuning of InP nanowires by introducing different dopants .…”

Section: Resultsmentioning

confidence: 99%

Pearl-Like ZnS-Decorated InP Nanowire Heterostructures and Their Electric Behaviors

et al. 2008

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One-dimensional semiconductor heterostructures with modulated compositions and interfaces have become of particular interest with respect to potential applications in nanoscale building blocks of future optoelectronic and nanoelectronic devices and systems. In this paper, we reported the synthesis of pearllike heterostructures, which are composed of ZnS-decorated on InP nanowires via a one-step thermochemical method. Field-effect transistors were fabricated on the basis of a single pearl-like InP/ ZnS heterostructure, which exhibited p-type transistor performance and a decent response to UV light exposure. Electronic transport properties of the devices at different temperatures were finally investigated, revealing a thermal activation behavior.

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Section: Resultsmentioning

confidence: 99%

Pearl-Like ZnS-Decorated InP Nanowire Heterostructures and Their Electric Behaviors

et al. 2008

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“…Hence, for the improvement of their selectivity, functionalization processes are required in many cases. 27 It was shown that these conduction conversions are related to the formation of acceptor defects that are responsible for the rst p-type conversion, and donor defects that cause the second n-type conversion. Abdelhalim and co-workers examined the response of a CNTbased gas sensor functionalized with Au, toward different ammonia concentrations, varying from 10-100 ppm.…”

Section: Introductionmentioning

confidence: 99%

“…26 Simultaneously, in recent years, carbon-based materials have been evaluated from the viewpoint of their transition from ntype to p-type materials, and their second conversion to n-type, upon annealing. 27 It was shown that these conduction conversions are related to the formation of acceptor defects that are responsible for the rst p-type conversion, and donor defects that cause the second n-type conversion. It has also been reported that graphene nanoribbons under functionalization by nitrogen species through high-power electrical joule heating in ammonia exhibit n-type electronic doping.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon-based gas sensors: effects of surface features on the sensing mechanism

et al. 2015

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Ammonia sensing capability of a commercial wood-based activated carbon (BAX) and its oxidized counterpart (BAX-O) was studied. The materials were exposed to continuous cycles of various ammonia concentrations, followed by purging with air, and changes in a normalized resistance were analyzed. When initially exposed to the reducing gas, chemical interactions between ammonia and the carbons generated an irreversible signal change, which was stronger in the case of the initial carbon. After equilibration and reactive adsorption the sensors were further tested with ammonia. During the reversible sensing, the two carbons exhibited opposite trends in their signal. This indicates that oxidation changed the electrical properties of the carbon sample, leading to a different sensing mechanism. For the initial material holes play the predominant role in a current transport, while their depletion upon the exposure to the reducing gas leads to a decrease in the conductivity. In the case of the oxidized sample, the presence of electron donating nitro groups causes a hole annihilation in the carbon itself converting it to a predominantly n-type material. Here the exposure to ammonia increases the conductivity of the chip owing to the electron donating properties of the gas. Physical interactions, such as hydrogen bonding, polar interactions with surface functional groups, and dispersive interactions of ammonia with the carbon matrix, lead to the pore filling, which governs the extent of the response signal. The sensor signal changes linearly with the ammonia concentration.

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Origin and Perspectives of the Photochemical Activity of Nanoporous Carbons

Bandosz

Ania

2018

Advanced Science

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Even though, owing to the complexity of nanoporous carbons' structure and chemistry, the origin of their photoactivity is not yet fully understood, the recent works addressed here clearly show the ability of these materials to absorb light and convert the photogenerated charge carriers into chemical reactions. In many aspects, nanoporous carbons are similar to graphene; their pores are built of distorted graphene layers and defects that arise from their amorphicity and reactivity. As in graphene, the photoactivity of nanoporous carbons is linked to their semiconducting, optical, and electronic properties, defined by the composition and structural defects in the distorted graphene layers that facilitate the exciton splitting and charge separation, minimizing surface recombination. The tight confinement in the nanopores is critical to avoid surface charge recombination and to obtain high photochemical quantum yields. The results obtained so far, although the field is still in its infancy, leave no doubts on the possibilities of applying photochemistry in the confined space of carbon pores in various strategic disciplines such as degradation of pollutants, solar water splitting, or CO2 mitigation. Perhaps the future of photovoltaics and smart‐self‐cleaning or photocorrosion coatings is in exploring the use of nanoporous carbons.

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Thermally induced conduction type conversion in n-type InP

Cited by 5 publications

References 21 publications

Pearl-Like ZnS-Decorated InP Nanowire Heterostructures and Their Electric Behaviors

Pearl-Like ZnS-Decorated InP Nanowire Heterostructures and Their Electric Behaviors

Activated carbon-based gas sensors: effects of surface features on the sensing mechanism

Origin and Perspectives of the Photochemical Activity of Nanoporous Carbons

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