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RESEARCH PRODUCT

Oligofluorene with multiple spiro-connections: its and their use in blue and white OLEDs

Klaus MüllenMartin BaumgartenDieter SchollmeyerChunbo DuanDongxue DingHui XuManfred WagnerDebin XiaShihui Liu

subject

PhotoluminescenceChemistrybusiness.industry02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesCatalysis0104 chemical sciencesActive componentMaterials ChemistryOLEDMoleculeOptoelectronics0210 nano-technologybusinessDiodeCommon emitter

description

Bond rotation within molecules is regarded as one of the nonradiative decay pathways and is detrimental to high photoluminescence quantum yields. In this work, a bulky and rigid blue emitter (Spiro-F) with five spiro-carbon linkages is synthesized. Spiro-F can serve not only as an active component of blue organic light-emitting diodes (OLEDs), but also as a host and blue emitter of white OLEDs. The WOLED offers a low turn-on voltage of 3.5 V and a high current efficiency of 3.6 cd A−1, together with CIE coordinates of (0.29, 0.33). This work proves the potential of super-rigid oligofluorene emitters for OLEDs.

yearjournalcountryeditionlanguage
2019-01-01New Journal of Chemistry
https://doi.org/10.1039/c8nj06135a