Full-Color Sterically Shielded Boron Difluoride Emitters with Efficient and Ultrapure Electroluminescence via Sensitized Fluorescence,ACS Applied Materials & Interfaces

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Full-Color Sterically Shielded Boron Difluoride Emitters with Efficient and Ultrapure Electroluminescence via Sensitized Fluorescence
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-05-26 , DOI: 10.1021/acsami.3c02628
Tianyu Huang ₁ , Qi Wang ₁ , Renyin Zhou ₂ , Haowen Chen ₂ , Wei Jiang ₂ , Jinbei Wei ₃ , Guoyun Meng ₁ , Guomeng Li ₁ , Xuewen Wang ₄ , Lian Duan ₁ , Dongdong Zhang ₁

Affiliation

Emitters with narrowband emissions are essential to improve the color purity of organic light-emitting diodes (OLEDs). Boron difluoride (BF) derivatives have preliminarily exhibited small full width at half-maximum (FWHM) values in electroluminescent devices, which, however, still face formidable challenges in recycling triplet excitons and realizing full-color emissions covering the whole visible spectra. Here, a systematic molecular engineering on the aza-fused aromatic emitting core and peripheral substitutions is made, affording a family of full-color BF emitters spanning from blue (461 nm) to red (635 nm), with high photoluminescence quantum yields of >90% and a small FWHM of 0.12 eV. The device architectures are delicately manipulated to form effective thermally activated sensitizing emissions, first affording the highest maximum external quantum efficiency of >20% for BF-based OLEDs with negligible efficiency roll-off.

中文翻译：

全色空间屏蔽二氟化硼发射器，通过敏化荧光实现高效超纯电致发光

具有窄带发射的发射器对于提高有机发光二极管 (OLED) 的色纯度至关重要。二氟化硼（BF）衍生物在电致发光器件中的半峰全宽（FWHM）初步呈现较小，但在回收三重态激子和实现覆盖整个可见光谱的全色发射方面仍面临着巨大挑战。在这里，对氮杂稠合芳香族发光核心和外围取代进行了系统的分子工程，提供了一系列从蓝色 (461 nm) 到红色 (635 nm) 的全色 BF 发射器，具有 > > 的高光致发光量子产率90% 和 0.12 eV 的小 FWHM。设备架构被巧妙地操纵以形成有效的热激活敏化发射，

更新日期：2023-05-26

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