【摘 要】
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The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in t
【机 构】
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Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosens
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The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in the ongoing development of organic semiconductors.Herein,two solution-processible resonance host materials with self-adaptive characteristics are delicately designed and constructed.Because of the dynamic tautomerization upon resonance variation,these smart hosts show self-adaptive and selectively enhanced charge carrier flux at high triplet energy levels.Conferred by the resonance molecules,solution-processed blue and white devices exhibit excellent maximum current efficiencies (CEs) of 29.8 and 57.3 cd A-1,and external quantum efficiencies (EQEs) up to 14.5％ and 23.5％,respectively.Our works highlight the significant progress of the solution-processed phosphorescent organic light-emitting diodes(PhOLEDs) using resonance host molecules,potentially furnishing a leap forward in constructing advanced organic semiconductors for next-generation optoelectronic devices.
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