期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 39, 页码 34162-34171出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b11422
关键词
organic light-emitting diodes; aggregation-induced emission; doping-free; sunlight; color rendering index
资金
- National Key Basic Research and Development Program of China (973 program) [2015CB655004]
- National Natural Science Foundation of China [61401156, 21673082, U1601651, U1301243]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306035]
- Pearl River S&T Nova Program of Guangzhou [201710010066, 201610010052]
- Fundamental Research Funds for Central Universities [2017MS008, 2017ZD001]
- China Postdoctoral Science Foundation [2017T100627]
- Tiptop Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C777, 2016TQ03C331]
Doping-free white organic light-emitting diodes (DF-WOLEDs) have aroused research interest because of their simple properties. However, to achieve doping-free hybrid WOLEDs (DFH-WOLEDs), avoiding aggregation-caused quenching is challenging. Herein, blue luminogens with aggregation-induced emission (AIE) characteristics, for the first time, have been demonstrated to develop DFH-WOLEDs. Unlike previous DFH-WOLEDs, both thin (<1 nm) and thick (>10 nm) AIE luminogen (AIEgen) can be used for devices, enhancing the flexibility. Two-color devices show (i) pure-white emission, (ii) high CRI (85), and (iii) high efiiciency. Particularly, 19.0 lm W1- is the highest for pure-white DF-WOLEDs, while 35.0 lm W1- is the best for two-color hybrid WOLEDs with CRI >= 80. A three-color DFH-WOLED shows broad color-correlated temperature span (2301-11628 K), (i) the first sunlight-like OLED (2500-8000 K) operating at low voltages, (ii) the broadest span among sunlight-like OLED, and (iii) possesses comparable efficiency with the best doping counterpart. Another three-color DFH-WOLED exhibits CRI >90 at >= 3000 cd m(-2), (i) the first DF-WOLED with CRI >= 90 at high luminances, and (ii) the CRI (92.8) is not only the highest among AIE-based WOLEDs hut also the highest among DF-WOLEDs. Such findings may unlock an alternative concept to develop DFH-WOLEDs.
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