Understanding the Impact of Thiophene/Furan Substitution on Intrinsic Charge-Carrier Mobility

2017 ◽  
Vol 121 (46) ◽  
pp. 25682-25690 ◽  
Author(s):  
Haydar Taylan Turan ◽  
İlhan Yavuz ◽  
Viktorya Aviyente
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
The Impact

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>

scholarly journals The impact of hot charge carrier mobility on photocurrent losses in polymer-based solar cells

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Bronson Philippa ◽  
Martin Stolterfoht ◽  
Paul L. Burn ◽  
Gytis Juška ◽  
Paul Meredith ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
The Impact

Relationship between supramolecular assembly and charge-carrier mobility in perylenediimide derivatives: The impact of side chains

2011 ◽  
Vol 21 (26) ◽  
pp. 9538 ◽  
Author(s):  
Falk May ◽  
Valentina Marcon ◽  
Michael Ryan Hansen ◽  
Ferdinand Grozema ◽  
Denis Andrienko
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Supramolecular Assembly ◽  
Charge Carrier Mobility ◽  
Side Chains ◽  
The Impact

Unveiling the charge migration mechanism in Na2O2: implications for sodium–air batteries

2015 ◽  
Vol 17 (12) ◽  
pp. 8203-8209 ◽  
Author(s):  
Rafael B. Araujo ◽  
Sudip Chakraborty ◽  
Rajeev Ahuja
Keyword(s):  
Charge Carrier ◽  
Charge Transport ◽  
Transport Mechanism ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Charge Transport Mechanism ◽  
Sodium Peroxide ◽  
Charge Migration ◽  
Migration Mechanism ◽  
The Impact

We systematically investigate the charge transport mechanism in sodium peroxide and explore the impact of charge carrier mobility on Na–O2 cell performance.

Charge carrier mobility of disordered organic semiconductors with correlated energetic and spatial disorder

2018 ◽  
Vol 20 (13) ◽  
pp. 8897-8908 ◽  
Author(s):  
Waldemar Kaiser ◽  
Tim Albes ◽  
Alessio Gagliardi
Keyword(s):  
Monte Carlo ◽  
Charge Carrier ◽  
Organic Semiconductors ◽  
Current Distribution ◽  
Carrier Mobility ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Study ◽  
Charge Carrier Mobility ◽  
Energetic Disorder ◽  
The Impact

Kinetic Monte Carlo study of the impact of spatial and energetic disorder on charge mobility, current distribution and transport energy in organic semiconductors.

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>

The Influence of Nitrogen Position on Charge Carrier Mobility in Enantiopure Aza[6]helicene Crystals

2018 ◽  
Author(s):  
Francesco Salerno ◽  
Beth Rice ◽  
Julia Schmidt ◽  
Matthew J. Fuchter ◽  
Jenny Nelson ◽  
...  
Keyword(s):  
Solid State ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Chemical Structure ◽  
Crystal Packing ◽  
Charge Carrier Mobility ◽  
Individual Factor ◽  
Charge Mobility ◽  
Order Of Magnitude ◽  
Small Change

<p>The properties of an organic semiconductor are dependent on both the chemical structure of the molecule involved, and how it is arranged in the solid-state. It is challenging to extract the influence of each individual factor, as small changes in the molecular structure often dramatically change the crystal packing and hence solid-state structure. Here, we use calculations to explore the influence of the nitrogen position on the charge mobility of a chiral organic molecule when the crystal packing is kept constant. The transfer integrals for a series of enantiopure aza[6]helicene crystals sharing the same packing were analysed in order to identify the best supramolecular motifs to promote charge carrier mobility. The regioisomers considered differ only in the positioning of the nitrogen atom in the aromatic scaffold. The simulations showed that even this small change in the chemical structure has a strong effect on the charge transport in the crystal, leading to differences in charge mobility of up to one order of magnitude. Some aza[6]helicene isomers that were packed interlocked with each other showed high HOMO-HOMO integrals (up to 70 meV), whilst molecules arranged with translational symmetry generally afforded the highest LUMO-LUMO integrals (40 - 70 meV). As many of the results are not intuitively obvious, a computational approach provides additional insight into the design of new semiconducting organic materials.</p>

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