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. (2016) 'Rational design of TADF polymers using a donoracceptor monomer with enhanced TADF eciency induced by the energy alignment of charge transfer and local triplet excited states.', Advanced optical materials., 4 (4). pp. 597-607. Further information on publisher's website:http://dx.doi.org/10.1002/adom.201500689 Publisher's copyright statement: This is the peer reviewed version of the following article: Nobuyasu, R. S., Ren, Z., Griths, G. C., Batsanov, A. S., Data, P., Yan, S., Monkman, A. P., Bryce, M. R. and Dias, F. B. (2016) Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. performance with EQE of 22% at low luminance (<100 cd/m 2 ), for 100 cd/m 2 the EQE is 2 19.4%. In the case of solution processed devices, using the novel TADF polymers, the performance was much lower, EQE3.5% at 100 cd/m 2 , which is still the highest value for a polymer TADF system at useful brightness, yet reported. This results from a combination of weak charge transport properties in these materials and device fabrication methods that require further improvement. Nevertheless, these results pave the way to explore TADF in polymer light emitting diodes (PLEDs), using less costly deposition methods, such as spincoating and inkjet printing, which are more appropriate for large area deposition.

ABSTRACT:The blends of low molecular weight triacetin (TAC) and oligomeric poly(1,3-butylene glycol adipate) (PBGA) were used as multiple plasticizers to lubricate poly-(lactic acid) (PLA) in this study. The thermal and mechanical properties of plasticized polymers were investigated by means of dynamic mechanical analysis and differential scanning calorimetry. Atomic force microscopy (AFM) was used to analyze the morphologies of the blends. Multiple plasticizers were effective in lowering the glass transition temperature (T g ) and the melting temperature (T m ) of PLA. Moreover, crystallinity of PLA increased with increasing the content of multiple plasticizers. Tensile strength of the blends decreased following the increasing of the plasticizers, but increased in elongation at break. AFM topographic images showed that the multiple plasticizers dispersed between interfibrillar regions. Moreover, the fibrillar crystallite formed the quasicrosslinkings, which is another cause for the increase in elongation at break.