Instability Origin and Improvement Scheme of Facial Alq3 for Blue OLED Application

doi:10.1007/s40242-016-5485-z

高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (3): 423-427.doi: 10.1007/s40242-016-5485-z

Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application

DU Jiaren¹, WANG Moran¹, CHEN Nianke¹, XIE Shengyi^1,2, YU Hongmei³, WU Qi³

1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Center for High Pressure Science and Technology Advanced Research, Changchun 130012, P. R. China;
3. College of Computer Science and Technology, Jilin University, Changchun 130012, P. R. China

收稿日期:2015-12-14 修回日期:2016-02-02 出版日期:2016-06-01 发布日期:2016-03-07
通讯作者: XIE Shengyi, WU Qi E-mail:ayikongjian@126.com;wuqi@jlu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos.61307119, 61235004)

Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application

DU Jiaren¹, WANG Moran¹, CHEN Nianke¹, XIE Shengyi^1,2, YU Hongmei³, WU Qi³

1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Center for High Pressure Science and Technology Advanced Research, Changchun 130012, P. R. China;
3. College of Computer Science and Technology, Jilin University, Changchun 130012, P. R. China

Received:2015-12-14 Revised:2016-02-02 Online:2016-06-01 Published:2016-03-07
Contact: XIE Shengyi, WU Qi E-mail:ayikongjian@126.com;wuqi@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.61307119, 61235004)

摘要/Abstract

摘要：

Degradation phenomenon and poor stability of tris(8-hydroxyquinoline) aluminum(III)(Alq₃)-based organic light-emitting diodes(OLEDs) have attracted much attention. In this paper, we discussed the origin of instability of the facial Alq₃-based blue luminescent OLEDs with the help of first-principles calculation. The results show that environmental humidity seriously affects the luminescence stability of Alq₃-based OLEDs. H₂O molecules in environment can be firmly bound to the oxygen atoms of the facial Alq₃, which then act as starting points for further degradation of Alq₃. Moreover, the interactions between facial Alq₃ and different cathode metal layers were investigated to explain the experiment phenomenon. A design guideline for diminishing the strong attraction from oxygen atoms can be proposed to protect Alq₃ and improve the stability of materials applied in OLEDs.

关键词: Organic light-emitting diode(OLED), Facial tris(8-hydroxyquinoline) aluminum(III)(Alq₃), First-principle calculation, Degradation mechanism

Abstract:

Key words: Organic light-emitting diode(OLED), Facial tris(8-hydroxyquinoline) aluminum(III)(Alq₃), First-principle calculation, Degradation mechanism

DU Jiaren, WANG Moran, CHEN Nianke, XIE Shengyi, YU Hongmei, WU Qi. Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application[J]. 高等学校化学研究, 2016, 32(3): 423-427.

DU Jiaren, WANG Moran, CHEN Nianke, XIE Shengyi, YU Hongmei, WU Qi. Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application[J]. Chemical Research in Chinese Universities, 2016, 32(3): 423-427.

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Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application

Instability Origin and Improvement Scheme of Facial Alq₃ for Blue OLED Application

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