scholarly journals Study of charge-carrier relaxation in a disordered organic semiconductor by simulating impedance spectroscopy

2014 ◽  
Vol 104 (21) ◽  
pp. 213301 ◽  
Author(s):  
M. Mesta ◽  
J. Cottaar ◽  
R. Coehoorn ◽  
P. A. Bobbert
Keyword(s):  
Impedance Spectroscopy ◽  
Charge Carrier ◽  
Organic Semiconductor ◽  
Carrier Relaxation

Charge carrier relaxation phenomena and phase transition in La 2 Mo 2 O 9 ceramics investigated by broadband impedance spectroscopy

2016 ◽  
Vol 213 ◽  
pp. 306-313 ◽  
Author(s):  
Algimantas Kežionis ◽  
Dalius Petrulionis ◽  
Edvardas Kazakevičius ◽  
Saulius Kazlauskas ◽  
Artūras Žalga ◽  
...  
Keyword(s):  
Phase Transition ◽  
Impedance Spectroscopy ◽  
Charge Carrier ◽  
Relaxation Phenomena ◽  
Carrier Relaxation

Charge carrier relaxation and phase transition in scandium stabilized zirconia ceramics

2014 ◽  
Vol 134 ◽  
pp. 176-181 ◽  
Author(s):  
Saulius Kazlauskas ◽  
Algimantas Kežionis ◽  
Edvardas Kazakevičius ◽  
Antanas Feliksas Orliukas
Keyword(s):  
Phase Transition ◽  
Charge Carrier ◽  
Stabilized Zirconia ◽  
Zirconia Ceramics ◽  
Carrier Relaxation

In-situ analysis of microwave conductivity and impedance spectroscopy for evaluation of charge carrier dynamics at interfaces

2017 ◽  
Vol 111 (20) ◽  
pp. 203302 ◽  
Author(s):  
Wookjin Choi ◽  
Junichi Inoue ◽  
Yusuke Tsutsui ◽  
Tsuneaki Sakurai ◽  
Shu Seki
Keyword(s):  
Impedance Spectroscopy ◽  
Charge Carrier ◽  
Carrier Dynamics ◽  
In Situ Analysis ◽  
Microwave Conductivity ◽  
Charge Carrier Dynamics

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>

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