期刊
NANO-MICRO LETTERS
卷 9, 期 4, 页码 -出版社
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-017-0138-4
关键词
White light; Hybrid; Interlayer; Color rendering index; Organic light-emitting diodes
资金
- National Key Research and Development Program of China [2016YFF02033604]
- Guangdong Natural Science Foundation [2014A030310253, 2016A030310360]
- Fundamental Research Funds for the Central Universities [2015ZM070]
- National Natural Science Foundation of China [51602065]
- Guangdong Science and Technology Plan [2016A040403037, 2016A010101026]
The interlayer (IL) plays a vital role in hybrid white organic light-emitting diodes (WOLEDs); however, only a negligible amount of attention has been given to n-type ILs. Herein, the n-type IL, for the first time, has been demonstrated to achieve a high efficiency, high color rendering index (CRI), and low voltage trade-off. The device exhibits a maximum total efficiency of 41.5 lm W-1, the highest among hybrid WOLEDs with n-type ILs. In addition, high CRIs (80-88) at practical luminances (C1000 cd m(-2)) have been obtained, satisfying the demand for indoor lighting. Remarkably, a CRI of 88 is the highest among hybrid WOLEDs. Moreover, the device exhibits low voltages, with a turn-on voltage of only 2.5 V (>1 cd m(-2)), which is the lowest among hybrid WOLEDs. The intrinsic working mechanism of the device has also been explored; in particular, the role of n-type ILs in regulating the distribution of charges and excitons has been unveiled. The findings demonstrate that the introduction of n-type ILs is effective in developing high-performance hybrid WOLEDs.
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