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10.1038/ncomms12689 http://scihub22266oqcxt.onion/10.1038/ncomms12689 C5013605!5013605!27573539     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27573539&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215       Nat+Commun 2016 ; 7 (ä): ä Nephropedia Template TP {{tp|p=27573539|t=2016. Photon upconversion with directed emission |pdf=|usr=}}{{27573539}} gab.com Text Photon upconversion with directed emission JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=27573539 #FOAvip Photon upconversion has the potential to increase the efficiency of single bandgap solar cells beyond the Shockley Queisser limit. Efficient light management is an important point in this context. Here we demonstrate that the direction of upconverted emission can be controlled in a reversible way, by embedding anthracene derivatives together with palladium porphyrin in a liquid crystalline matrix. The system is employed in a triplet-triplet annihilation photon upconversion scheme demonstrating controlled switching of directional anti Stokes emission. Using this approach an emission ratio of 0.37 between the axial and longitudinal emission directions and a directivity of 1.52 is achieved, reasonably close to the theoretical maximal value of 2 obtained from a perfectly oriented sample. The system can be switched for multiple cycles without any visible degradation and the speed of switching is only limited by the intrinsic rate of alignment of the liquid crystalline matrix. Twit Text FOAVip Photon upconversion with directed emission ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=27573539 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=27573539 #FOAvip English Wikipedia <ref>{{Cite pmid|27573539}}</ref> Photon upconversion with directed emission #MMPMID27573539 Börjesson K; Rudquist P; Gray V; Moth-Poulsen K Nat Commun 2016[]; 7 (ä): ä PMID27573539show ga Photon upconversion has the potential to increase the efficiency of single bandgap solar cells beyond the Shockley Queisser limit. Efficient light management is an important point in this context. Here we demonstrate that the direction of upconverted emission can be controlled in a reversible way, by embedding anthracene derivatives together with palladium porphyrin in a liquid crystalline matrix. The system is employed in a triplet-triplet annihilation photon upconversion scheme demonstrating controlled switching of directional anti Stokes emission. Using this approach an emission ratio of 0.37 between the axial and longitudinal emission directions and a directivity of 1.52 is achieved, reasonably close to the theoretical maximal value of 2 obtained from a perfectly oriented sample. The system can be switched for multiple cycles without any visible degradation and the speed of switching is only limited by the intrinsic rate of alignment of the liquid crystalline matrix. äPhoton upconversion with directed emission (epmc).pdf DeepDyve Pubget Overpricing