Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 9, Pages 3384-3388Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am200559b
Keywords
light-emitting electrochemical cell; white luminescence; solid-state lighting; conjugated polymer; solution-processed technology
Funding
- Kempestiftelserna
- Carl Tryggers Stiftelse
- Swedish Research Council (Vetenskapsradet)
- Knut and Alice Wallenberg Foundation
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We report a light-emitting electrochemical cell (LEC) with air-stable electrodes and a solution-processed single-layer active material that emits warm-white light (CIE coordinates = (0.39, 0.43); color rendering index =83) with significant brightness (B) at a low voltage. The carefully tuned trichromatic device exhibits a short turn-on time (similar to 5 s to B > 100 cd/m(2)), high efficiency (3.1 cd/A at B = 240 cd/m(2)) and good operational stability (17 h at B > 100 cd/m(2)). We also report a blue LEC with a highly respectable set of device properties in the form of a turn-on time of s, an efficiency of 3.6 lm/W and 5.6 cd/A, and an uninterrupted operational lifetime of 25 h. Finally, by analyzing data from trichromatic and monochromatic devices as well as from the constituent fluorescent CPs, we are able to point out a viable path toward further improvements in the performance of the white-emitting LEC.
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