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https://hdl.handle.net/20.500.14279/32656
Title: | Unexpected Performance of a Bifunctional Sensitizer/Activator Component for Photon Energy Management via Upconversion | Authors: | Antoniou, Giannis N. Athanasopoulos, Stavros Koyioni, Maria Koutentis, Panayiotis A. Keivanidis, Panagiotis E. |
Major Field of Science: | Engineering and Technology | Field Category: | Mechanical Engineering | Issue Date: | 23-May-2024 | Source: | The journal of physical chemistry letters, 2024, vol. 15, iss. 20, pp. 5337-5343 | Volume: | 15 | Issue: | 20 | Start page: | 5337 | End page: | 5343 | Journal: | The Journal of Physical Chemistry Letters | Abstract: | We here report on the observation of upconverted photoluminescence (UC-PL) from the blue-light-emitting 9,10-diphenylanthracene (DPA) mixed with the yellow-light-absorbing bifunctional sensitizer/activator component of (3,3,7,8,12,13,17,18-octaethylporphyrin-22,24-diid-2-one) PtII (PtOEP-K). Yellow-to-blue UC-PL (0.680 eV spectral upshift) is achieved at room temperature under ultralow power continuous incoherent photoexcitation (220 μW/cm2) despite the absence of triplet energy transfer (TET) between PtOEP-K and DPA. Under selective CW-laser photoexcitation of PtOEP-K in DPA:PtOEP-K, a 2.5% UC-PL quantum yield is obtained; that is an improvement exceeding by more than 3 orders of magnitude the UC-PL quantum yield of TTA-UC material combinations wherein no TET is operative. The PL response of DPA:PtOEP-K to varying laser fluence suggests that bimolecular annihilation reactions between triplet-excited PtOEP-K facilitate the UC-PL activation in DPA. These findings pave the way toward low-complexity strategies for the reduction of transmission losses in solar energy technologies through an innovative wavelength upshifting protocol involving excitonic materials. | URI: | https://hdl.handle.net/20.500.14279/32656 | ISSN: | 19487185 | DOI: | 10.1021/acs.jpclett.4c00720 | Rights: | Attribution-NonCommercial-NoDerivatives 4.0 International | Type: | Article | Affiliation : | Cyprus University of Technology Universidad Carlos III de Madrid University of Cyprus |
Appears in Collections: | Άρθρα/Articles |
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