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The cover illustrates a photorefractive composite‐based, white light, multibeam coupler, wherein the novel broad‐band sensitizer DiPBI displaces the widely used PCBM. As the absorption spectrum of DiPBI stretches over the whole range of visible light, operation at any desired wavelength is possible. This essential advantage over PCBM makes the new compound a promising candidate for optical computing...
A new photorefractive (PR) material sensitized with a novel functional unit DiPBI is prepared based on the guest/host approach. This unique mixture exhibits strong absorption in the whole range of visible light. Moreover, the photorefractive performance as well as PR speed is improved by far compared to the widely used sensitizer PCBM.
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