Annealing-induced phase transition in zinc phthalocyanine ultrathin films

Hyeyoung Ahn*, Ting Chang Chu

*此作品的通信作者

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

We report the evidence of post-annealing-induced phase transition in zinc phthalocyanine (ZnPc) ultrathin (~20 nm) films upon annealing at 200 °C. The signatures of phase transition are observed in their morphological, structural, and ultrafast spectroscopic properties. X-ray diffraction measurement shows that a-phase nanospheres transform to β- phase nanorods that have a high degree of crystallinity with an excellent ordering along the cdirection in a monoclinic arrangement. Tight packing of molecules in the β-crystallites allows a red-shift and intensity gain of the lowest-energy subband in the Q-band and subsequently increases the electronic coupling in both intercolumn and intracolumn paths.

原文English
頁(從 - 到)3586-3593
頁數8
期刊Optical Materials Express
6
發行號11
DOIs
出版狀態Published - 2016

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