Combining Charge-Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High-Performance Solution-Processed, Non-doped Blue OLEDs

Xu-Lin Chen; Ji-Hui Jia; Rongmin Yu; Jian-Zhen Liao; Ming-Xue Yang; Can-Zhong Lu

doi:10.1002/anie.201709125

Combining Charge-Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High-Performance Solution-Processed, Non-doped Blue OLEDs

Angew Chem Int Ed Engl. 2017 Nov 20;56(47):15006-15009. doi: 10.1002/anie.201709125. Epub 2017 Oct 24.

Authors

Xu-Lin Chen^{1

2}, Ji-Hui Jia^{1

3}, Rongmin Yu¹, Jian-Zhen Liao¹, Ming-Xue Yang^{1

3}, Can-Zhong Lu^{1

2}

Affiliations

¹ CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian Province, P. R. China.
² Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Science, Xiamen, 361021, P. R. China.
³ Graduate University of Chinese Academy of Sciences, Beijing, 100049, China.

PMID: 28990260
DOI: 10.1002/anie.201709125

Abstract

Two efficient blue thermally activated delayed fluorescence compounds, B-oCz and B-oTC, composed of ortho-donor (D)-acceptor (A) arrangement were designed and synthesized. The significant intramolecular D-A interactions induce a combined charge transfer pathway and thus achieve small ΔE_ST and high efficiencies. The concentration quenching can be effectively inhibited in films of these compounds. The blue non-doped organic light emitting diodes (OLEDs) based on B-oTC prepared from solution processes shows record-high external quantum efficiency (EQE) of 19.1 %.

Keywords: OLEDs; blue emission; boron compounds; fluorescence; thin films.

Publication types

Research Support, Non-U.S. Gov't