Suppressing crystallization in solution-processed thin films of organic semiconductors

被引：0
作者：
Jes B. Sherman
Chien-Yang Chiu
Ryan Fagenson
Guang Wu
Craig J. Hawker
Michael L. Chabinyc
机构：
[1] University of California Santa Barbara,Department of Chemistry and Biochemistry
[2] University of California Santa Barbara,Materials Department
来源：
MRS Communications | 2015年 / 5卷
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摘要：
Glassy organic semiconductors provide a convenient host for dispersing guest molecules, such as dopants or light-emitting chromophores. However, many glass-forming compounds will crystallize overtime leading to changes in performance and stability in devices. Methods to stabilize amorphous molecular solids are therefore desirable. We demonstrate that solution-processable glasses can be formed from a mixture of 8,8’-biindeno[2,1-b]thiophenylene (BTP) atropisomers. While the trans isomer of methylated BTP, (E)-MeBTP crystallizes in spin-cast films, the addition of (Z)-MeBTP slows the growth of the spherulites. X-ray scattering and optical microscopy indicate that films containing 40% (Z)-MeBTP do not crystallize, even with the addition of nucleation agents and aging for several months.
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页码：447 / 452
页数：5
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