Details

Autor(en) / Beteiligte

• Wang, Xiang
• Zhang, Yuewei
• Dai, Hengyi
• Li, Guomeng
• Liu, Meihui
• Meng, Guoyun
• Zeng, Xuan
• Huang, Tianyu
• Wang, Lu
• Peng, Qian
• Yang, Dezhi
• Ma, Dongge
• Zhang, Dongdong
• Duan, Lian

Titel

Mesityl‐Functionalized Multi‐Resonance Organoboron Delayed Fluorescent Frameworks with Wide‐Range Color Tunability for Narrowband OLEDs

Ist Teil von

• Angewandte Chemie International Edition, 2022-09, Vol.61 (38), p.e202206916-n/a

Auflage

International ed. in English

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Polycyclo‐heteraborin multi‐resonance (MR) emitters are promising for high color‐purity organic light‐emitting diodes (OLEDs). Here, unlike the most common heteroatom ternary‐doped (X/B/N) frameworks, a binary‐doped (B/N) skeleton is reported with a large energy band for wide‐range color tunability. Based on this parent‐segment, a “one‐pot” catalyst‐free borylation method is developed which generates deep blue to pure green MR emitters from readily available starting materials, with peaks at 426–532 nm and full‐width‐at‐half‐maxima of 27–38 nm. Impressively, a maximum external quantum efficiency of nearly 40 % is recorded for the corresponding device with Commission Internationale de l′Eclairage coordinates of (0.14, 0.16), representing the state‐of‐the‐art performances. This work presents a new paradigm and synthesis of B/N‐doped MR emitters and will motivate the study of other novel frameworks. Deep blue to pure green boron‐ and nitrogen‐embedded multi‐resonance (MR) emitters with a binary‐doped B/N skeleton have been developed that exhibit high photoluminescence quantum yields up to unity, narrow band widths (FWHM <40 nm), and fast radiative decay rates of about 108 s−1 . The materials show maximum external quantum efficiencies up to 39.8 % and CIEy coordinates of 0.05 when used as emitters in organic light‐emitting diodes.