Phase transitions in thermally annealed films of Alq3

被引：4

作者：

Baldacchini, G.

Chiacchiaretta, P. ^{[1
]}

Pode, R. B. ^{[2
]}

Vincenti, M. A. ^{[3
]}

Wang, Q. -M. ^{[4
]}

机构：

[1] Univ G DAnnunzio, Dept Neurosci & Imaging, I-66013 Chieti, Italy

[2] Kyung Hee Univ, Dept Phys, Seoul 130701, South Korea

[3] ENEA, UTAPRAD MNF, CR Frascati, Photon Micro & Nanostruct Lab, I-00044 Rome, Italy

[4] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China

来源：

LOW TEMPERATURE PHYSICS | 2012年 / 38卷 / 08期

关键词：

MOLECULAR PACKING;

D O I：

10.1063/1.4740245

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Organic light emitting devices have improved greatly in recent years, so they are now widely used in displays and lighting. Annealing processes in different atmospheres strongly affect their performance, as when the active material is the small molecule Alq(3). In particular, a significant increase in the photoluminescence is observed in thin films of this molecule between 150 and 180 degrees C, before physical destruction of the films sets in at higher temperatures. This phenomenon is attributed to a phase transition to a novel morphological aggregation of the molecules in the film, which has yielded a much improved optical material for luminescence applications, and seems to apply to other molecules as well. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4740245]

引用

页码：786 / 791

页数：6

共 17 条

[1] Morphological phase transitions in Alq3 films [J].