Charge transport in organic crystals: Critical role of correlated fluctuations unveiled by analysis of Feynman diagrams

2015 ◽  
Vol 142 (14) ◽  
pp. 144503 ◽  
Author(s):  
Daniel M. Packwood ◽  
Kazuaki Oniwa ◽  
Tienan Jin ◽  
Naoki Asao
Keyword(s):  
Charge Transport ◽  
Critical Role ◽  
Feynman Diagrams ◽  
Organic Crystals

scholarly journals Deciphering the effect of traps on electronic charge transport properties of methylammonium lead tribromide perovskite

2020 ◽  
Vol 6 (37) ◽  
pp. eabb6393
Author(s):  
Artem Musiienko ◽  
Jindřich Pipek ◽  
Petr Praus ◽  
Mykola Brynza ◽  
Eduard Belas ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Charge Transport ◽  
Transport Properties ◽  
Critical Role ◽  
Charge Carriers ◽  
Electronic Charge ◽  
Free Charge ◽  
Optoelectronic Materials ◽  
Halide Perovskites

Halide perovskites have undergone remarkable developments as highly efficient optoelectronic materials for a variety of applications. Several studies indicated the critical role of defects on the performance of perovskite devices. However, the parameters of defects and their interplay with free charge carriers remain unclear. In this study, we explored the dynamics of free holes in methylammonium lead tribromide (MAPbBr3) single crystals using the time-of-flight (ToF) current spectroscopy. By combining ToF spectroscopy and Monte Carlo simulation, three energy states were detected in the bandgap of MAPbBr3. In addition, we found the trapping and detrapping rates of free holes ranging from a few microseconds to hundreds of microseconds. Contrary to previous studies, we revealed a strong detrapping activity of traps. We showed that these traps substantially affect the transport properties of MAPbBr3, including mobility and mobility-lifetime product. Our results provide an insight on charge transport properties of perovskite semiconductors.

Charge Transport in Organic Crystals: Role of Disorder and Topological Connectivity

2010 ◽  
Vol 132 (33) ◽  
pp. 11702-11708 ◽  
Author(s):  
Thorsten Vehoff ◽  
Björn Baumeier ◽  
Alessandro Troisi ◽  
Denis Andrienko
Keyword(s):  
Charge Transport ◽  
Organic Crystals ◽  
Topological Connectivity

Critical Role of Molecular Symmetry for Charge Transport Properties: A Paradigm Learned from Quinoidal Bithieno[3,4-b]thiophenes

2017 ◽  
Vol 29 (11) ◽  
pp. 4999-5008 ◽  
Author(s):  
Longbin Ren ◽  
Dafei Yuan ◽  
Eliot Gann ◽  
Yuan Guo ◽  
Lars Thomsen ◽  
...  
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Critical Role ◽  
Molecular Symmetry

The Role of the SLP in Autism Spectrum Disorder Screening and Assessment

2008 ◽  
Vol 15 (2) ◽  
pp. 50-59 ◽  
Author(s):  
Amy Philofsky
Keyword(s):  
Language Development ◽  
Critical Role ◽  
Children With Autism ◽  
Autism Spectrum ◽  
Children With Asd ◽  
Prevalence Estimates ◽  
Notable Increase ◽  
Screening Assessment ◽  
Critical Components

AbstractRecent prevalence estimates for autism have been alarming as a function of the notable increase. Speech-language pathologists play a critical role in screening, assessment and intervention for children with autism. This article reviews signs that may be indicative of autism at different stages of language development, and discusses the importance of several psychometric properties—sensitivity and specificity—in utilizing screening measures for children with autism. Critical components of assessment for children with autism are reviewed. This article concludes with examples of intervention targets for children with ASD at various levels of language development.

A critical role of iNOS-derived Nitric Oxide (NO) and progesterone in implantation

1998 ◽  
Vol 5 (1) ◽  
pp. 115A-115A
Author(s):  
K CHWALISZ ◽  
E WINTERHAGER ◽  
T THIENEL ◽  
R GARFIELD
Keyword(s):  
Nitric Oxide ◽  
Critical Role
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