Great improvement of operation-lifetime for all-solution OLEDs with mixed hosts by blade coating

Yu Fan Chang, Cheng Han Yu, Shao Chun Yang, I. Hong Hong, Sin Ciang Jiang, Hsin-Fei Meng*, Heh Lung Huang, Hsiao-Wen Zan, Sheng Fu Horng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We investigated some effective device designs and fabrication methods for long operation-lifetime all-solution-processed Phosphorescent OLEDs (PhOLEDs) and fluorescent OLEDs with mixed-hosts system and thin Poly [(9, 9-dioctylfluorenyl-2, 7-diyl)-co-(4, 4'-(N-(4-sec-butylphenyl) diphenylamine)] (TFB). The all-solution-processed green PhOLEDs had high current efficiency (30.3 cd/A) and long operation-lifetime. The best half-lifetime of green PhOLEDs with thin HTL, MH-hosts EML and optimized deposition was 310 h at an initial luminance 1000 cd/m2, 250 h at an initial luminance 500 cd/m2 for green PhOLEDs with thin HTL, and MH-hosts EML, and the lifetime of triple layer PhOLEDs device was only 0.5 h for the same materials. The red PhOLEDs exhibited a high current efficiency (10.93 cd/A) and half-lifetime with 157.9 h at an initial luminance 500 cd/m2. For the blue fluorescent OLEDs, the thin polymer TFB, mixed-hosts EML, double EMLs and optimization deposition yield a high current efficiency (5.68 cd/A) and long operation-lifetime with 117.7 h at an initial luminance 500 cd/m2. Single host fluorescent device had half-lifetime of 73.5 h only at an initial luminance 100 cd/m2. Finally, by doping red emitter Rubrene into stable blue device, we achieved soft yellow OLEDs with high efficiency (10.87 cd/A) and 8 fold improvement operation-lifetime (1200 h). We believe that such all-solution-processed OLEDs which showed greatly improved operational lifetimes would be suitable for the indoor supportive lighting with natural colors.

Original languageEnglish
Pages (from-to)75-86
Number of pages12
JournalOrganic Electronics
Volume42
DOIs
StatePublished - 1 Mar 2017

Keywords

  • Blade-coating
  • Operation-lifetime
  • Organic Light-Emitting Diodes
  • Solution-process

Fingerprint Dive into the research topics of 'Great improvement of operation-lifetime for all-solution OLEDs with mixed hosts by blade coating'. Together they form a unique fingerprint.

Cite this