scholarly journals Organic semiconductors with a charge carrier life time of over 2 hours at room temperature

2015 ◽  
Vol 3 (47) ◽  
pp. 12260-12266 ◽  
Author(s):  
Yang Liu ◽  
Roderick. C. I. MacKenzie ◽  
Bin Xu ◽  
Yajun Gao ◽  
Miquel Gimeno-Fabra ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Organic Semiconductors ◽  
Room Temperature ◽  
Life Time ◽  
Materials Used ◽  
A Charge ◽  
Carrier Life Time

By tuning both the materials used in the device, and it's structure we are able to observe a charge carrier life time of over 2 hours and still extract significant amounts of charge after 5 hours.

scholarly journals Temperature Dependence of Hall Mobility AndCarrier Concentration of pb0.55S0.45 Films

2009 ◽  
Vol 6 (1) ◽  
pp. 129-134
Author(s):  
Baghdad Science Journal
Keyword(s):  
Hall Mobility ◽  
Room Temperature ◽  
Annealing Temperature ◽  
High Vacuum ◽  
Life Time ◽  
Mean Free Path ◽  
Charge Carriers ◽  
Evaporation Technique ◽  
Carrier Life Time ◽  
Type Conduction

Measurements of Hall effect properties at different of annealing temperature have been made on polycrystalline Pb0.55S0.45 films were prepared at room temperature by thermal evaporation technique under high vacuum 4*10-5 torr . The thickness of the film was 2?m .The carrier concentration (n) was observed to decrease with increasing the annealing temperature. The Hall measurements showed that the charge carriers are electrons (i.e n-type conduction). From the observed dependence on the temperature, it is found that the Hall mobility (µH), drift velocity ( d) carrier life time ( ), mean free path (?) were increased with increasing annealing temperature

Electrophysical Properties of Iodine Doped Acetylene/Ethylene Copolymers

1993 ◽  
Vol 328 ◽  
Author(s):  
A. N. Aleshin ◽  
E. G. Guk ◽  
V. A. Marikhin ◽  
L. P. Myasnikova ◽  
D. G. Belov
Keyword(s):  
Thermal Properties ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Room Temperature ◽  
Dc Conductivity ◽  
Charge Carrier Transport ◽  
Electrophysical Properties ◽  
Ethylene Copolymers ◽  
Hopping Mechanism ◽  
A Charge

ABSTRACTA new oxydative-resistant, fusible and processible ethylene/acetylene copolymer has been synthesized. The content of rigid (acetylene) and flexible (ethylene) fragments has been widely varied. The structure of the nascent powders and the films compressed at room temperature have been investigated by SEM and WAXS. DSC has been used for studying the thermal properties. DC conductivity of the iodine doped samples has been measured as a function of temperature. It is shown that the doping leads to arising conductivity in the samples even at 10 Mol % acetylene fragments in copolymer. The conductivity up to 10−3 S/cm is reached for the samples with acetylene fragment concentration about 20 Mol %. It is found that a charge carrier transport in investigated copolymers is caused by doped polyacetylene fragments and described by the hopping Mechanism.

scholarly journals The influence of CdCl2 layer and annealing process on the structural and electrical properties of CdTe films

2019 ◽  
Vol 11 (22) ◽  
pp. 8-13
Author(s):  
Mohammed A. Razooqi
Keyword(s):  
Room Temperature ◽  
Life Time ◽  
Hall Effect Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties ◽  
Evaporation Technique ◽  
Cdte Films ◽  
P Type ◽  
Carrier Life Time

A polycrystalline CdTefilms have been prepared by thermal evaporation technique on glass substrate at room temperature. The films thickness was about700±50 nm. Some of these films were annealed at 573 K for different duration times (60, 120 and 180 minutes), and other CdTe films followed by a layer of CdCl2 which has been deposited on them, and then the prepared CdTe films with CdCl2 layer have been annealed for the same conditions. The structures of CdTe films without and with CdCl2 layer have been investigated by X-ray diffraction. The as prepared and annealed films without and with CdCl2 layer were polycrystalline structure with preferred orientation at (111) plane. The better structural properties have been observed in presence of CdCl2 layer. The D.C conductivity for CdTe films with CdCl2 layershowed higher values. The electrical activation energy influenced with increasing duration times of annealing. Hall Effect measurement was indicated that all CdTe films are p-type. The carrier concentration, Hall mobility and the carrier life time wereaffected by increasing duration times of annealing.

Effect of X-Ray Irradiation on the Current of P-N Diode

2011 ◽  
Vol 695 ◽  
pp. 561-564 ◽  
Author(s):  
Itsara Srithanachai ◽  
Surada Ueamanapong ◽  
Poopol Rujanapich ◽  
Amporn Poyai ◽  
Surasak Niemcharoen ◽  
...  
Keyword(s):  
Room Temperature ◽  
Life Time ◽  
Electrical Characteristics ◽  
X Ray ◽  
Boron Doped ◽  
Characteristic Variation ◽  
Current Voltage ◽  
Before And After ◽  
Order Of Magnitude ◽  
Carrier Life Time

An effect induced by x-ray irradiation on Boron-doped crystalline Si at room temperature was closely investigated in this paper. Irradiation of X-ray energy of 40, 55 and 70keV has been performed on P-N junction diodes fabricated at Thai Microelectronics Center. Minority carrier life time of the device has been calculated before and after irradiation for comparison. The results show no significant change on the value between exposed and unexposed device. Therefore, any permanent lattice modified or any defects caused by X-ray in the device bulk seem to be unconfirmed in this range of energy. However, from this study, X-ray irradiation still effects on electrical characteristics of the diodes. Current-voltage (I-V) measurement has been carried out to study characteristic variation of the device. Biasing of the device was performed from -10 to 1 V and, after the exposure, the leakage current was obviously decreased by 25% and forward current was dramatically increased by 3 order of magnitude related to increment of X-ray energy.

Suppression of surface defects to achieve hysteresis-free inverted perovskite solar cells via quantum dot passivation

2020 ◽  
Vol 8 (10) ◽  
pp. 5263-5274 ◽  
Author(s):  
Chintam Hanmandlu ◽  
Satyanarayana Swamy ◽  
Anupriya Singh ◽  
Hsin-An Chen ◽  
Chi-Ching Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Charge Carrier ◽  
Surface Defects ◽  
Perovskite Solar Cells ◽  
Life Time ◽  
Trap Charge ◽  
Defect Passivation ◽  
Carrier Life Time

We fabricated the defect passivation of perovskite solar cells using CdSe/ZnS quantum dots. The efficient defect passivation of reduces the trap charge density and elongates the charge carrier life time.

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

Nanoscale Imaging of Charge Carrier and Exciton Trapping at Structural Defects in Organic Semiconductors

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 2084-2089 ◽  
Author(s):  
Christoph Große ◽  
Olle Gunnarsson ◽  
Pablo Merino ◽  
Klaus Kuhnke ◽  
Klaus Kern
Keyword(s):  
Charge Carrier ◽  
Organic Semiconductors ◽  
Structural Defects ◽  
Nanoscale Imaging

Studies Concerning the Corrosion Behaviour of the Cast Stainless Steel Used for Chemical Industry

2013 ◽  
Vol 371 ◽  
pp. 338-342
Author(s):  
Gheorghe Simionescu ◽  
Mirela Gheorghian
Keyword(s):  
Chemical Industry ◽  
Room Temperature ◽  
Corrosion Behaviour ◽  
Research Work ◽  
Experimental Tests ◽  
Hot Environment ◽  
Chemical Agents ◽  
The Subject ◽  
Materials Used ◽  
Cast Stainless Steel

The current work deals with experimental tests concerning the behaviour of different materials used in chemical industry when are exposed to diverse corrosions environments. During the research work four different metals have been tested, namely T15NiCr180, T15MoNiCr180, W4027 and W4059. The presented work is trying to classify the tested materials function to different chemical environment, different concentration of the environment, different temperature of the environment, and different expose time. Some of the substances which were considered as corrosion environment are: HNO3, H3PO4, NaCl, NH4Cl, C2H5OH, Petrol, NH4NO3, KNO3, K2CO3, Na2CO3, KMnO4, KOH and Ca (OH)2. The concentration of the corrosion solutions varies between 1% and 96%. Tests have been done at room temperature and hot environment of 100°C. Time is playing an important role on evolution of the corrosion. For this reason the samples have been analyzed after 48, 336, 720 and 2160 hours of exposes to chemical agents. To understand the comportment of the subject metals when are used in industry, samples have been tested for longer period of time, respectively 1, 3, 6 and 12 months. After each selected period of time the metallic samples were analyzed and measured to quantify the effect of the environment on the corrosion speed.

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