Details

Autor(en) / Beteiligte

• Shi, Huifang
• Song, Lulu
• Ma, Huili
• Sun, Chen
• Huang, Kaiwei
• Lv, Anqi
• Ye, Wenpeng
• Wang, He
• Cai, Suzhi
• Yao, Wei
• Zhang, Yujian
• Zheng, Ruilin
• An, Zhongfu
• Huang, Wei

Titel

Highly Efficient Ultralong Organic Phosphorescence through Intramolecular-Space Heavy-Atom Effect

Ist Teil von

• The journal of physical chemistry letters, 2019-02, Vol.10 (3), p.595-600

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Metal-free organic phosphorescent materials have attracted considerable attention in the fields of organic electronics and bioelectronics. However, it remains a great challenge to achieve organic phosphors with high quantum efficiency in a single-component system. We designed and synthesized two organic phosphors (PDCz and PDBCz) with an ultralong organic phosphorescence (UOP) feature. Both molecules showed ultralong emission lifetime of >200 ms. For PDBCz crystal, it was found that the absolute phosphorescence quantum efficiency reaches up to 38.1%. Combining the experimental and theoretical studies, the highly efficient UOP was mainly attributed to the intramolecular space heavy-metal effect, which facilitates the spin–orbit coupling between singlet and triplet excited states to effectively promote the intersystem crossing. This study will provide a new platform to rationally design highly efficient UOP materials and show its potential in the field of flexible electronics.