P‐110: Donor‐Acceptor Type Bifunctional Molecules with Hybridized Local and Charge‐Transfer Excited State as Efficient Non‐Doped Deep‐Blue Emitters for Highly Efficient Fluorescent OLEDs

Khushbu Patel, Seung Chan Kim, Jun Yeob Lee
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Abstract

Herein, we synthesized two novel D–p–A fluorescent molecules namely PhAnsIn and PhAnoIn based on dimethyl‐ dihydroindenocarbazole–anthracene‐ phenanthroimidazole for non‐doped blue organic light‐emitting diodes. The excited‐state properties of the PhAnsIn and PhAnoIn investigated through photophysical experiments and density functional theory revealed the HLCT excited‐state characteristics. The neat films of PhAnsIn and PhAnoIn exhibited photoluminescence quantum yields of 80.6% and 56.5%, respectively. The non‐doped devices based on PhAnsIn and PhAnoIn exhibited corresponding blue emissions with electroluminescence peaks at 458 and 457 nm, a maximum EQE of 8.2% and 8.5% with CIE coordinates of (0.14,0.12) and (0.14,0.11), respectively.
P‐110:具有杂化局部激发态和电荷转移激发态的供体-受体型双功能分子作为高效的非掺杂深蓝发光器件用于高效荧光oled
在此,我们合成了两种新型的D–p–A荧光分子,即PhAnsIn和PhAnoIn,它们基于二甲基-二氢茚并噻唑-蒽并菲咪唑,用于非掺杂蓝色有机发光二极管。通过光物理实验和密度泛函理论研究了PhAnsIn和PhAnoIn的激发态特性,揭示了HLCT的激发态特征。PhAnsIn和PhAnoIn的纯膜分别表现出80.6%和56.5%的光致发光量子产率。基于PhAnsIn和PhAnoIn的非掺杂器件表现出相应的蓝色发射,电致发光峰值分别在458和457 nm,最大EQE分别为8.2%和8.5%,CIE坐标分别为(0.14,0.12)和(0.14,0.11)。
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