Proton intercalated two-dimensional WO3nano-flakes with enhanced charge-carrier mobility at room temperature

Nanoscale ◽  
2014 ◽  
Vol 6 (24) ◽  
pp. 15029-15036 ◽  
Author(s):  
Serge Zhuiykov ◽  
Eugene Kats ◽  
Benjamin Carey ◽  
Sivacarendran Balendhran
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Room Temperature ◽  
Charge Carrier Mobility ◽  
Two Dimensional

Room-temperature discotic liquid-crystalline coronene diimides exhibiting high charge-carrier mobility in air

2009 ◽  
Vol 19 (37) ◽  
pp. 6688 ◽  
Author(s):  
Zesheng An ◽  
Junsheng Yu ◽  
Benoit Domercq ◽  
Simon C. Jones ◽  
Stephen Barlow ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Charge Carrier Mobility ◽  
High Charge ◽  
High Charge Carrier Mobility

Record Charge Carrier Mobility in a Room-Temperature Discotic Liquid-Crystalline Derivative of Hexabenzocoronene

1999 ◽  
Vol 11 (17) ◽  
pp. 1469-1472 ◽  
Author(s):  
A. M. van de Craats ◽  
J. M. Warman ◽  
A. Fechtenkötter ◽  
J. D. Brand ◽  
M. A. Harbison ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Charge Carrier Mobility

Enhanced Charge Carrier Mobility in Two-Dimensional High Dielectric Molybdenum Oxide

2012 ◽  
Vol 25 (1) ◽  
pp. 109-114 ◽  
Author(s):  
Sivacarendran Balendhran ◽  
Junkai Deng ◽  
Jian Zhen Ou ◽  
Sumeet Walia ◽  
James Scott ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Molybdenum Oxide ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Two Dimensional ◽  
High Dielectric

scholarly journals Enhanced Charge Carrier Mobility in Two-Dimensional High Dielectric Molybdenum Oxide (Adv. Mater. 1/2013)

2013 ◽  
Vol 25 (1) ◽  
pp. 108-108 ◽  
Author(s):  
Sivacarendran Balendhran ◽  
Junkai Deng ◽  
Jian Zhen Ou ◽  
Sumeet Walia ◽  
James Scott ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Molybdenum Oxide ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Two Dimensional ◽  
High Dielectric

Two-dimensional charge carrier mobility studies of regioregular P3HT

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1449-1450 ◽  
Author(s):  
A.N. Aleshin ◽  
H. Sandberg ◽  
H. Stubb
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Two Dimensional ◽  
Mobility Studies

Sb2Te3 and Bi2Te3 Thin Films Grown by Molecular Beam Epitaxy at Room Temperature

2011 ◽  
Vol 1329 ◽  
Author(s):  
Z. Aabdin ◽  
M. Winkler ◽  
D. Bessas ◽  
J. König ◽  
N. Peranio ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Molecular Beam Epitaxy ◽  
Charge Carrier ◽  
Power Factor ◽  
Carrier Mobility ◽  
Room Temperature ◽  
Molecular Beam ◽  
Charge Carrier Mobility ◽  
X Ray

ABSTRACTNano-alloyed p-type Sb2Te3 and n-type Bi2Te3 thin films were grown on SiO2/Si and BaF2 substrates by molecular beam epitaxy (MBE) in two steps: (i) Repeated deposition of five-layer stacks with sequence Te-X-Te-X-Te (X = Sb or Bi) with elemental layer thicknesses of 0.2 nm on substrates at room temperature, (ii) annealing at 250 °C for two hours at which phase formation of Sb2Te3 or Bi2Te3 occurred. The room temperature MBE deposition method reduces surface roughness, allows the use of non lattice-matched substrates, and yields a more accurate and easier control of the Te content compared to Bi2Te3 thin films, which were epitaxially grown on BaF2 substrates at 290 °C. X-ray diffraction revealed that the thin films were single phase, poly-crystalline, and textured. The films showed grain sizes of 500 nm for Sb2Te3 and 250 nm for Bi2Te3, analyzed by transmission electron microscopy (TEM). The in-plane transport properties (thermopower S, electrical conductivity σ, charge carrier density n, charge carrier mobility μ, power factor S2σ) were measured at room temperature. The nano-alloyed Sb2Te3 thin film revealed a remarkably high power factor of 29 μW cm-1 K-2 similar to epitaxially grown Bi2Te3 thin films and Sb2Te3 single crystalline bulk materials. This large power factor can be attributed to a high charge carrier mobility of 402 cm2 V−1 s-1 similar to high-ZT Bi2Te3/Sb2Te3 superlattices. However, for the nano-alloyed Bi2Te3 thin film a low power factor of 8 μW cm−1 K-2 and a low charge carrier mobility of 80 cm2 V−1 s−1 were found. Detailed microstructure and phase analyses were carried out by energy-filtered TEM in cross-sections. Quantitative chemical analysis by energy-dispersive x−ray spectroscopy (EDS) was also applied. In Bi2Te3 thin films, few nanometer thick Bi-rich blocking layers at grain boundaries and Te fluctuations by 1.3 at.% within the grains were observed. The small charge carrier densities are explained by a reduced antisite defect density due to the low temperatures to which the thin films were exposed during annealing.

scholarly journals Large Responsivity of Graphene Radiation Detectors with Thermoelectric Readout: Results of Simulations

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1930
Author(s):  
August Yurgens
Keyword(s):  
Charge Carrier ◽  
Carrier Density ◽  
Carrier Mobility ◽  
Room Temperature ◽  
Charge Carrier Mobility ◽  
Radiation Detectors ◽  
Charge Carrier Density ◽  
Trade Off ◽  
Device Resistance ◽  
Receiving Antenna

Simple estimations show that the thermoelectric readout in graphene radiation detectors can be extremely effective even for graphene with modest charge-carrier mobility ∼1000 cm 2 /(Vs). The detector responsivity depends mostly on the residual charge-carrier density and split-gate spacing and can reach competitive values of ∼ 10 3 – 10 4 V/W at room temperature. The optimum characteristics depend on a trade-off between the responsivity and the total device resistance. Finding out the key parameters and their roles allows for simple detectors and their arrays, with high responsivity and sufficiently low resistance matching that of the radiation-receiving antenna structures.

scholarly journals Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chuanzhao Li ◽  
Jin Yang ◽  
Fuhai Su ◽  
Junjun Tan ◽  
Yi Luo ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Molecular Conformation ◽  
Strong Dependence ◽  
Charge Carrier Mobility ◽  
Optoelectronic Properties ◽  
Organic Cations ◽  
Two Dimensional ◽  
Broadband Emission ◽  
Conformational Order

Abstract The chemical nature of the organic cations governs the optoelectronic properties of two-dimensional organic-inorganic perovskites. But its mechanism is not fully understood. Here, we apply femtosecond broadband sum frequency generation vibrational spectroscopy to investigate the molecular conformation of spacer organic cations in two-dimensional organic-inorganic perovskite films and establish a correlation among the conformation of the organic cations, the charge carrier mobility, and broadband emission. Our study indicates that both the mobility and broadband emission show strong dependence on the molecular conformational order of organic cations. The gauche defect and local chain distortion of organic cations are the structural origin of the in-plane mobility reduction and broad emission in two-dimensional organic-inorganic perovskites. Both of the interlayer distance and the conformational order of the organic cations affect the out-of-plane mobility. This work provides molecular-level understanding of the conformation of organic cations in optimizing the optoelectronic properties of two-dimensional organic-inorganic perovskites.

Sign in / Sign up

Export Citation Format

Share Document