偶极子
亚稳态
材料科学
力矩(物理)
化学物理
方向(向量空间)
跃迁偶极矩
分子内力
电偶极矩
凝聚态物理
光电子学
纳米技术
化学
有机化学
物理
经典力学
几何学
数学
作者
Masaki Tanaka,Morgan Auffray,Hajime Nakanotani,Chihaya Adachi
出处
期刊:Nature Materials
[Springer Nature]
日期:2022-05-30
卷期号:21 (7): 819-825
被引量:26
标识
DOI:10.1038/s41563-022-01265-7
摘要
The performance of organic optoelectronic and energy-harvesting devices is largely determined by the molecular orientation and resultant permanent dipole moment, yet this property is difficult to control during film preparation. Here, we demonstrate the active control of dipole direction-that is, vector direction and magnitude-in organic glassy films by physical vapour deposition. An organic glassy film with metastable permanent dipole moment orientation can be obtained by utilizing the small surface free energy of a trifluoromethyl unit and intramolecular permanent dipole moment induced by functional groups. The proposed molecular design rule could pave a way toward the formation of spontaneously polarized organic glassy films, leading to improvement in the performance of organic molecular devices.
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