摘要
发展新型高性能黄色磷光材料是实现高品质互补色白光有机发光器件(OLEDs)的关键。本工作中,使用氯原子功能化的2-苯基喹啉衍生物作为环金属配体,乙酰丙酮作为辅助配体,通过温和的合成方法制备了一种新型氯功能化的黄色磷光铱(Ⅲ)配合物(Ir1)。通过核磁共振谱和单晶X-射线衍射确认了配合物的结构。该配合物在二氯甲烷中具有强的宽谱带黄色磷光发射,最大发射峰位于574 nm,发射寿命为1.29μs,量子效率达到51%。与同类发射波段的铱(Ⅲ)配合物相比,该黄光配合物具有非常宽的单分子发射半峰宽(101 nm)。进一步制备了基于该磷光配合物的高性能黄光OLEDs,器件最大发射峰位于568 nm,发射半峰宽达到88 nm,器件最大亮度、外量子效率、电流效率和功率效率分别达到18310 cd/m2、20.8%、58.16 cd/A和48.3 lm/W。结果表明该黄色磷光配合物在高性能互补色白光有机发光器件方面具有重要前景。
High-performance yellow emitter is the key to achieve high-quality complementary white organic electroluminescence.Herein,a novel yellow iridium(Ⅲ)complex(Ir1)is synthesized by using chlorine-bearing cyclometalated ligand under the mild condition.The complex is confirmed by nuclear magnetic resonance and X-ray diffraction analysis.In degassed CH2Cl2,the complex shows bright yellow phosphorescent emission with high luminescent quantum yield of 51%and lifetime of 1.29μs at room temperature.Notably,the full width at half maximum(FWHM)of emission spectrum is up to 101 nm.Moreover,complex Ir1 is served as triplet emitter in organic light-emitting device.The device exhibits broad yellow emission at 568 nm with FWHM of 88 nm,maximum brightness of 18310 cd/m2,external quantum efficiency of 20.8%,current efficiency of 58.2 cd/A and power efficiency of 48.3 lm/W.
作者
陶鹏
郑小康
尹梦娜
赵方卿
苗艳勤
刘淑娟
赵强
TAO Peng;ZHENG Xiao-kang;YIN Meng-na;ZHAO Fang-qing;MIAO Yan-qin(Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials, Institute of Flexible Electronics (Future Technology),Nanjing University of Posts and Telecommunications, Nanjing 210023, China;Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)
出处
《液晶与显示》
CAS
CSCD
北大核心
2021年第1期1-7,共7页
Chinese Journal of Liquid Crystals and Displays
基金
国家杰出青年科学基金(No.61825503)
国家自然科学基金(No.61905120,No.61705156)
江苏省自然科学基金(No.BK20190740)
山西省重点研发计划(国际合作项目:No.201903D421087)。
关键词
磷光
铱(Ⅲ)配合物
黄光
电致发光
半峰宽
phosphorescence
iridium(Ⅲ)complex
yellow emission
electroluminescence
full width at half maximum
