Efficient white polymer light-emitting diodes (WPLEDs) based on covalent-grafting of [Zn2(MP)3(OAc)] into PVK. Issue 10 (12th February 2020)

• Record Type: Journal Article
• Authors: Fu, Guorui; He, Yani; Li, Wentao; Miao, Tiezheng; Lü, Xingqiang; He, Hongshan; Liu, Li; Wong, Wai-Yeung
• Is Part Of: Chemical science. Volume 11:Issue 10(2020)
• Page Start: 2640
• Page End: 2646
• Publication Date: 2020-02-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9sc05288g
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : Using [Zn2 (MP)3 (OAc)] -grafted polymer as a single emitting layer, record-high efficiencies and weak ( ca . 25%) efficiency roll-off are realized for cost-effective and large-area flexible WPLEDs. Abstract : Thanks to the straightforward white light of single grafting-type polymers based on earth-abundant Zn(ii )-complexes, producing cost-effective flexible WOLEDs/WPLEDs with good device performance remains a formidable challenge. Herein, by using the polymer Poly(NVK- co -[Zn2 (MP)3 (OAc)]) with excellent physical properties for single-layer WPLEDs, record-high efficiencies ( η Maxc = 13.0 cd A −1, η Maxp = 6.1 lm W −1 and η MaxEQE = 9.2%) and low ( ca . 25%) efficiency roll-off compared to previous organo-Zn 2+ -based WOLEDs/WPLEDs are realized. This finding renders single Zn(ii )-complex-grafted polymers a new route to low-cost and large-area flexible WPLEDs for potential full-colour flat displays.