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Efficient white polymer light-emitting diodes (WPLEDs) based on covalent-grafting of [Zn2(MP)3(OAc)] into PVK† † Electronic supplementary information (ESI) available: Starting materials and characterization methods; detailed synthesis and characterization; XRD; quantum calculations. CCDC 1894830. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c9sc05288g

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 (ηMaxc = 13.0 cd A−1, ηMaxp = 6.1 lm W−1 and ηMaxEQE = 9.2%) and low (ca. 25%) efficiency roll-off compared to previous organo-Zn2+-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. 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.

SUBMITTER: Fu G

PROVIDER: S-EPMC8157705 | biostudies-literature |

REPOSITORIES: biostudies-literature

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