scholarly journals Effect of polarity‐reversal voltage on charge accumulation and carrier mobility in silicone rubber/silicon carbide composites

2021 ◽  
Author(s):  
Boxue Du ◽  
Chong Han ◽  
Zhonglei Li ◽  
Chenlei Han ◽  
Jin Li ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Silicone Rubber ◽  
Carrier Mobility ◽  
Polarity Reversal ◽  
Charge Accumulation ◽  
Effect Of Polarity

scholarly journals Elucidating the Impact of Charge Selective Contact in Halide Perovskite Through Impedance Spectroscopy

2019 ◽  
Author(s):  
Mohd Taukeer Khan ◽  
Manuel Salado ◽  
Abdullah R. D. Almohammedi ◽  
Samrana Kazim ◽  
Shahzada Ahmad
Keyword(s):  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Charge Carrier Mobility ◽  
Charge Accumulation ◽  
Frequency Dependent ◽  
The Impact

<p>The electron and hole selective contact (SC) play a pivotal role in the performance of perovskite solar cells. In order to separate the interfacial phenomenon from bulk, the influence of charge SC was elucidated, by means of impedance spectroscopy. The specific role played by TiO<sub>2</sub> and <i>Spiro-OMeTAD</i> as electron and hole SC in perovskite solar cells was investigated at short circuit condition at different temperatures. We have probed MAPbI<sub>3</sub> and (FAPbI<sub>3</sub>)<sub>0.85</sub>(MAPbBr<sub>3</sub>)<sub>0.15 </sub>and elucidated parameters such as charge carrier mobility, recombination resistance, time constant and charge carrier kinetics in perovskite layer and at the interface of perovskite/SC. Charge carrier mobility in mixed perovskite was found to be nearly two order of magnitude higher as compared to MAPbI<sub>3</sub>. Moreover, the carrier mobility in devices with only electron SC was found to be higher as compared only hole SC. The charge accumulation at TiO<sub>2</sub>/perovskite/<i>Spiro</i>-OMeTAD interfaces were studied via frequency dependent capacitance, revealing higher charge accumulation at perovskite/S<i>piro</i>-OMeTAD than at TiO<sub>2</sub>/perovskite interface. By performing varying temperature frequency dependent capacitance measurements the distribution of density of state within the bandgap of the perovskites, the emission rate of electrons from the trap states and traps activation energy was determined. </p>

Electrical tree initiation in silicone rubber under DC and polarity reversal voltages

2017 ◽  
Vol 88 ◽  
pp. 207-213 ◽  
Author(s):  
Yunxiao Zhang ◽  
Yuanxiang Zhou ◽  
Ming Chen ◽  
Ling Zhang ◽  
Xu Zhang ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Polarity Reversal ◽  
Electrical Tree

scholarly journals Space charge evolution and its effects on electrical tree degradation in silicone rubber at varied temperature under polarity reversal voltage

2022 ◽  
Vol 115 ◽  
pp. 103668
Author(s):  
Yunxiao Zhang ◽  
Yuanxiang Zhou ◽  
Ling Zhang ◽  
Chenyuan Teng ◽  
Xin Huang ◽  
...  
Keyword(s):  
Space Charge ◽  
Silicone Rubber ◽  
Polarity Reversal ◽  
Electrical Tree ◽  
Varied Temperature

Titanium oxide nanoparticle increases shallow traps to suppress space charge accumulation in polypropylene dielectrics

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 48720-48727 ◽  
Author(s):  
Yao Zhou ◽  
Jun Hu ◽  
Bin Dang ◽  
Jinliang He
Keyword(s):  
Charge Carrier ◽  
Space Charge ◽  
Titanium Oxide ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Charge Accumulation ◽  
Oxide Nanoparticle ◽  
Surface Modified ◽  
Shallow Traps

Introduction of surface modified nano-TiO2 increases shallow traps and enhances charge carrier mobility so as to suppress space charge accumulation.

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