Synthesis of all-deuterated tris(2-phenylpyridine)iridium for highly stable electrophosphorescence: the “deuterium effect”

Ping Wang; Fei-Fei Wang; Yi Chen; Qiang Niu; Lei Lu; Hong-Ming Wang; Xi-Cun Gao; Bin Wei; Hong-Wei Wu; Xin Cai; De-Chun Zou

doi:10.1039/C3TC30547C

Synthesis of all-deuterated tris(2-phenylpyridine)iridium for highly stable electrophosphorescence: the “deuterium effect”†

Ping Wang,‡^a Fei-Fei Wang,‡^b Yi Chen,^a Qiang Niu,^a Lei Lu,^a Hong-Ming Wang,^a Xi-Cun Gao,*^a Bin Wei,*^b Hong-Wei Wu,^c Xin Cai^c and De-Chun Zou*^c

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* Corresponding authors

^a Department of Chemistry, School of Science, Nanchang University, Xue-Fu Road 999, Hong-Gu-Tan New District, Nanchang 330031, China
E-mail: xcgao@ncu.edu.cn

^b Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China
E-mail: bwei@shu.edu.cn

^c Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
E-mail: dczou@pku.edu.cn

Abstract

Device stability and life-time rank the key issues for PhOLEDs. We synthesized deuterated Ir(ppy)₃-D₂₄. A device based on it has a current density twenty times higher than and a life-time six times longer than devices based on Ir(ppy)₃. The more stable C–D bond is found to be the main contributing factor, called the “deuterium effect”.

Journal of Materials Chemistry C

Synthesis of all-deuterated tris(2-phenylpyridine)iridium for highly stable electrophosphorescence: the “deuterium effect”†

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Synthesis of all-deuterated tris(2-phenylpyridine)iridium for highly stable electrophosphorescence: the “deuterium effect”

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