Abstract
The positive external heavy atom effect on upconversion efficiency (Φuc) of DPA (9,10-diphenylanthracene) emitter combined with palladium(II)tetraphenylporphyrins as triplet sensitizer was first found to significantly increase from 12.33% to 35.17% under excitation of low power density at 30 mW·cm–2 (λex = 532 nm). Dynamics data showed that the increasing phosphorescence lifetime (τp) and the phosphorescence quantum yield (Φp) of sensitizer, accompanied with the decreasing nonphosphorescence decay rate constant (knp), have contribution to the triplet–triplet energy transfer (TTT). Interestingly, the external heavy atom effect was found to be more efficient than the internal heavy atom effect on upconversion efficiency, which has provided a simple approach to increase low-powered upconversion efficiency without the difficulties that can arise by the modification of the sensitizer molecular structure in its inner parts. Moreover, this efficient green-to-blue upconversion has been demonstrated to have potent...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
