scholarly journals Influence of Molecular Shape on the Thermal Stability and Molecular Orientation of Vapor-Deposited Organic Semiconductors

2017 ◽  
Vol 8 (14) ◽  
pp. 3380-3386 ◽  
Author(s):  
Diane M. Walters ◽  
Lucas Antony ◽  
Juan J. de Pablo ◽  
M. D. Ediger
Keyword(s):  
Thermal Stability ◽  
Organic Semiconductors ◽  
Molecular Orientation ◽  
Molecular Shape

Molecular orientation and thermal stability of thin-film organic semiconductors

2021 ◽  
Vol 88 ◽  
pp. 106014
Author(s):  
Han-Nan Yang ◽  
Shou-Jie He ◽  
Tao Zhang ◽  
Jia-Xiu Man ◽  
Yongbiao Zhao ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
Organic Semiconductors ◽  
Molecular Orientation ◽  
Thermal Stability Of

scholarly journals Tunable molecular orientation and elevated thermal stability of vapor-deposited organic semiconductors

2015 ◽  
Vol 112 (14) ◽  
pp. 4227-4232 ◽  
Author(s):  
Shakeel S. Dalal ◽  
Diane M. Walters ◽  
Ivan Lyubimov ◽  
Juan J. de Pablo ◽  
M. D. Ediger
Keyword(s):  
Thermal Stability ◽  
Substrate Temperature ◽  
Organic Semiconductors ◽  
Performance Optimization ◽  
Molecular Orientation ◽  
Physical Vapor Deposition ◽  
Light Emitting ◽  
Active Layers ◽  
Molecular Length ◽  
Stable Glasses

Physical vapor deposition is commonly used to prepare organic glasses that serve as the active layers in light-emitting diodes, photovoltaics, and other devices. Recent work has shown that orienting the molecules in such organic semiconductors can significantly enhance device performance. We apply a high-throughput characterization scheme to investigate the effect of the substrate temperature (Tsubstrate) on glasses of three organic molecules used as semiconductors. The optical and material properties are evaluated with spectroscopic ellipsometry. We find that molecular orientation in these glasses is continuously tunable and controlled by Tsubstrate/Tg, where Tg is the glass transition temperature. All three molecules can produce highly anisotropic glasses; the dependence of molecular orientation upon substrate temperature is remarkably similar and nearly independent of molecular length. All three compounds form “stable glasses” with high density and thermal stability, and have properties similar to stable glasses prepared from model glass formers. Simulations reproduce the experimental trends and explain molecular orientation in the deposited glasses in terms of the surface properties of the equilibrium liquid. By showing that organic semiconductors form stable glasses, these results provide an avenue for systematic performance optimization of active layers in organic electronics.

π-Spacer-Linked Bisthienopyrroles with Tunable Optical Properties

Synlett ◽  
2018 ◽  
Vol 29 (19) ◽  
pp. 2567-2571 ◽  
Author(s):  
Mihaela Stefan ◽  
Chandima Bulumulla ◽  
Ruwan Gunawardhana ◽  
Prabhath Gamage ◽  
Ruvanthi Kularatne ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Electrochemical Properties ◽  
Organic Semiconductors ◽  
Building Block ◽  
Theoretical Calculations ◽  
Synthesis And Characterization ◽  
Tunable Optical Properties

Thieno[3,2-b]pyrrole is an effective nonconventional semiconducting building block that could be generated in gram quantities with relatively high overall yields. Three organic semiconductors containing thieno[3,2-b]pyrrole were synthesized in good yields without requiring time-consuming column purifications. The synthesis, optical and electrochemical properties were systematically investigated.1 Introduction2 Experimental3 Synthesis and Characterization4 Theoretical Calculations5 Optical and Electrochemical Properties6 Thermal Stability7 Fluorescence Experiments8 GIXRD Data9 Conclusions

scholarly journals Cyclohexyl-Substituted Anthracene Derivatives for High Thermal Stability Organic Semiconductors

2019 ◽  
Vol 7 ◽  
Author(s):  
Yicai Dong ◽  
Yuan Guo ◽  
Hantang Zhang ◽  
Yanjun Shi ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Organic Semiconductors ◽  
High Thermal Stability ◽  
Anthracene Derivatives

Molecular orientation of gel forming compounds and their effect on molecular-shape selectivity in liquid chromatography

2014 ◽  
Vol 1324 ◽  
pp. 149-154 ◽  
Author(s):  
Abul K. Mallik ◽  
Sudhina Guragain ◽  
Hiroshi Hachisako ◽  
Mohammed Mizanur Rahman ◽  
Makoto Takafuji ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Molecular Orientation ◽  
Shape Selectivity ◽  
Molecular Shape

scholarly journals Structural Geometry Variation of 1,4-Naphthalene-Based Co-Polymers to Tune the Device Performance of PVK-Host-Based OLEDs

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2914
Author(s):  
Qian Liu ◽  
Dhanashree Moghe ◽  
Gopa Sardar ◽  
Sergei Manzhos ◽  
Steven E. Bottle ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Organic Semiconductors ◽  
High Thermal Stability ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Blue Color ◽  
Structural Geometry ◽  
Light Emitting ◽  
Organic Light ◽  
Coupling Polymerization

Blue-color-emitting organic semiconductors are of significance for organic light-emitting diodes (OLEDs). In this study, through Suzuki coupling polymerization, three 1,4-naphthalene-based copolymers—namely, PNP(1,4)-PT, PNP(1,4)-TF, and PNP(1,4)-ANT—were designed and synthesized. The variation of comonomers, phenothiazine (PT), triphenylamine substituted fluorene (TF), and anthanthrene (ANT), effectively tuned the emitting color and device performance of poly(9-vinyl carbazole) (PVK)-based OLEDs. Especially, the polymer PNP(1,4)-TF, bearing perpendicular aryl side groups, showed a most twisted structural geometry, which enabled an ultra-high thermal stability and a best performance with blue emitting in PVK-host-based OLEDs. Overall, in this work, we demonstrate a promising blue-color-emitting polymer through structural geometry manipulation.

scholarly journals A new family of liquid and solid guanidine-based n-type dopants for solution-processed perovskite solar cells

2020 ◽  
Vol 4 (12) ◽  
pp. 3616-3622
Author(s):  
Hidenori Nakayama ◽  
Julia A. Schneider ◽  
Mina Faust ◽  
Hengbin Wang ◽  
Javier Read de Alaniz ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Physical Properties ◽  
Organic Semiconductors ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Solution Processed ◽  
New Family

A new family of n-type dopants for organic semiconductors is reported. Changing the alkyl chain of these triazabicyclodecene (TBD) dopants alters their physical properties, including thermal stability, and influences their doping efficiency.

Sign in / Sign up

Export Citation Format

Share Document