Solution processed low-color temperature OLED with high efficiency
2018 25th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)(2018)
摘要
Blue-hazard free, low color temperature (CT) lighting sources are crucial for their low suppression of melatonin secretion and creating a warm, comfortable atmosphere, while high-efficiency is required to obtain energy-saving devices. Solution processing enables organic devices to be fabricated cost-effectively with a large area-size via continuous roll-to-roll manufacturing. We demonstrate here a high-efficiency, low CT organic light emitting diode with a power-efficiency of 30.9 lm/W, a current efficiency of 36.1 cd/A and an external quantum efficiency of 12.9% at 100 cd/m
2
. Futhermore, the resultant device shows a CT as low as 2,026 Kat 100 cd/nr', i.e. much lower than that of incandescent bulbs (
~
2500 K) and comparable to candles (
~
2000 K). The high efficiency may be attributed to the use of electroluminescence efficient materials, effective host -to-guest energy transfer and introduction of p-type doped hole transport layer.
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关键词
solution processing,organic devices,low CT organic light emitting diode,power-efficiency,current efficiency,external quantum efficiency,electroluminescence efficient materials,p-type doped hole transport layer,host-to-guest energy transfer,continuous roll-to-roll manufacturing,energy-saving devices,melatonin secretion,blue-hazard free low color temperature lighting sources,solution processed low-color temperature OLED,temperature 2026 K
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