A novel structure of grid spirofluorene: a new organic semiconductor with low reorganization energy

2019 ◽  
Vol 43 (20) ◽  
pp. 7790-7796 ◽  
Author(s):  
Lei Yang ◽  
Jie Mao ◽  
Cheng-Zhu Yin ◽  
Mohamad Akbar Ali ◽  
Xiang-Ping Wu ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Reorganization Energy ◽  
Charge Mobility ◽  
Inorganic Semiconductors ◽  
Novel Structure ◽  
Lower Charge

The lower charge mobility of organic semiconductors relative to that of inorganic semiconductors is a thorny problem that still has not been resolved.

Application of hopping theory for the prediction of charge mobility in amorphous organic materials

2012 ◽  
Vol 1402 ◽  
Author(s):  
Karl Sohlberg ◽  
Choongkeun Lee ◽  
Robert Waterland
Keyword(s):  
Detailed Analysis ◽  
Organic Materials ◽  
Reorganization Energy ◽  
Hole Mobility ◽  
Charge Hole ◽  
Numerical Approximations ◽  
Material Density ◽  
Charge Mobility ◽  
Lower Charge ◽  
Insight Into

ABSTRACTThe application of hopping theory for the prediction of charge (hole) mobility in amorphous organic molecular materials is studied in detail. Application is made to amorphous cells of N,N’-diphenyl-N,N’-bis-(3-methylphenylene)-1,1’-diphenyl-4,4’-diamine (TPD), N4,N4’-di(biphenyl-3-yl)-N4,N4’-diphenylbiphenyl-4,4’-diamine (mBPD), 1,1-bis-(4,4’-diethylaminophenyl)-4,4-diphenyl-1,3,butadinene (DEPB), N1,N4-di(naphthalen-1-yl)-N1,N4-diphenylbenzene-1,4-diamine (NNP), and N,N’-bis[9,9-dimethyl-2-fluorenyl]-N,N’-diphenyl-9,9-dimethylfluorene-2,7-diamine (pFFA). Detailed analysis of the computation of each of the parameters in the equations for hopping rate is presented, including studies of their convergence with respect to various numerical approximations. Based on these convergence studies, the most robust practical methodology is applied to investigate the dependence of mobility on such parameters as the monomer reorganization energy, the monomer-monomer coupling and the material density. The results give insight into what factors should be controlled to develop materials with higher (or lower) charge (hole) mobility, and what will be required to improve the accuracy of predictions of mobility in amorphous organic materials.

Attaining air stability in high performing n-type phthalocyanine based organic semiconductors

2021 ◽  
Author(s):  
Nathan J Yutronkie ◽  
Benjamin King ◽  
Owen Alfred Melville ◽  
Benoit Hugo Lessard ◽  
Jaclyn L Brusso
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Strong Electron ◽  
Electron Conduction ◽  
High Performing ◽  
Silicon Phthalocyanine

The perfluorinated analogue of silicon phthalocyanine (F2-F16SiPc) has been synthesized as a novel air-stable n-type organic semiconductor. The design of F2-F16SiPc facilitates strong electron conduction through peripheral fluorination that deepens...

A metrology perspective on the dark injection transient current method for charge mobility determination in organic semiconductors

2011 ◽  
Vol 109 (9) ◽  
pp. 093707 ◽  
Author(s):  
T. Esward ◽  
S. Knox ◽  
H. Jones ◽  
P. Brewer ◽  
C. Murphy ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Current Method ◽  
Transient Current ◽  
Charge Mobility

2,6-Bis[2-(4-pentylphenyl)vinyl]anthracene:  A Stable and High Charge Mobility Organic Semiconductor with Densely Packed Crystal Structure

2006 ◽  
Vol 128 (29) ◽  
pp. 9304-9305 ◽  
Author(s):  
Hong Meng ◽  
Fangping Sun ◽  
Marc B. Goldfinger ◽  
Feng Gao ◽  
David J. Londono ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Organic Semiconductor ◽  
Charge Mobility ◽  
High Charge

Organic Semiconductors: Relating the Functional Properties of an Organic Semiconductor to Molecular Structure by nc-AFM (Adv. Mater. 20/2009)

2009 ◽  
Vol 21 (20) ◽  
pp. NA-NA
Author(s):  
Sarah A. Burke ◽  
Jeffrey M. LeDue ◽  
Jessica M. Topple ◽  
Shawn Fostner ◽  
Peter Grütter
Keyword(s):  
Molecular Structure ◽  
Organic Semiconductors ◽  
Functional Properties ◽  
Organic Semiconductor

Nanoconfining solution-processed organic semiconductors for emerging optoelectronics

2021 ◽  
Author(s):  
Yuze Zhang ◽  
Alina Chen ◽  
Min-Woo Kim ◽  
Aida Alaei ◽  
Stephanie S. Lee
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Light Emission ◽  
Solution Processed ◽  
Semiconductor Crystals

This tutorial review highlights the role of nanoconfinement in selecting for orientations and polymorphs of organic semiconductor crystals that are optimized for optoelectronic processes, including charge transport and light emission.

scholarly journals Photoconversion Mechanism at the pn-Homojunction Interface in Single Organic Semiconductor

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1727 ◽  
Author(s):  
Ji-Hyun Lee ◽  
Armand Perrot ◽  
Masahiro Hiramoto ◽  
Seiichiro Izawa
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Energy Structure ◽  
Free Charge ◽  
Charge Generation ◽  
Recombination Processes ◽  
Single Host ◽  
Donor Acceptor ◽  
Doping Technique ◽  
Determining Factor

Clarifying critical differences in free charge generation and recombination processes between inorganic and organic semiconductors is important for developing efficient organic photoconversion devices such as solar cells (SCs) and photodetector. In this study, we analyzed the dependence of doping concentration on the photoconversion process at the organic pn-homojunction interface in a single organic semiconductor using the temperature dependence of J–V characteristics and energy structure measurements. Even though the organic pn-homojunction SC devices were fabricated using a single host material and the doping technique resembling an inorganic pn-homojunction, the charge generation and recombination mechanisms are similar to that of conventional donor/acceptor (D/A) type organic SCs; that is, the charge separation happens from localized exciton and charge transfer (CT) state being separated by the energy offset between adjacent molecules, and the recombination happens from localized charge carrier at two adjacent molecules. The determining factor for photoconversion processes is the localized nature of charges in organic semiconductors. The results demonstrated that controlling the delocalization of the charges is important to realize efficient organic photoconversion devices.

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