Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=26204810
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Solution-Processed Phosphorescent Organic Light-Emitting Diodes with Ultralow
Driving Voltage and Very High Power Efficiency
#MMPMID26204810
Wang S
; Wang X
; Yao B
; Zhang B
; Ding J
; Xie Z
; Wang L
Sci Rep
2015[Jul]; 5
(?): 12487
PMID26204810
show ga
To realize power efficient solution-processed phosphorescent organic
light-emitting diodes (s-PhOLEDs), the corresponding high driving voltage issue
should be well solved. To solve it, efforts have been devoted to the exploitation
of novel host or interfacial materials. However, the issues of charge trapping of
phosphor and/or charge injection barrier are still serious, largely restraining
the power efficiency (PE) levels. Herein, with the utilization of an
exciplex-forming couple 4, 4', 4?-tris[3-methylphenyl(phenyl)amino]triphenylamine
(m-MTDATA) and 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB), the efficient
charge injection and transporting, barrier-free hole-electron recombination for
the formation of the interfacial exciplex, and elimination of charge traps of
phosphors in the emissive layer are realized simultaneously, resulting in a
turn-on voltage of 2.36?V, a record high PE of 97.2?lm W(-1), as well as
extremely low driving voltage of 2.60?V at 100?cd m(-2), 3.03?V at 1000?cd m(-2)
and 4.08?V at 10000?cd m(-2). This report is the first time that the PE
performance of s-PhOLED approaches 100?lm W(-1) high level, even superior to the
corresponding state-of-the-art performance of the same color vacuum-deposited
PhOLED (v-PhOLED) counterpart. We anticipate this report opens a new avenue for
achieving power efficient monochromatic and white s-PhOLEDs with simple
structures.
free
free
free
