| 초록 |
Single-crystalline, octahedral CeO2:Eu3+ nanocrystals is prepared using a simple hydrothermal method. The size of the CeO2:Eu3+ nanocrystals (300−400 nm), as well as their mirror-like facets, significantly improved the diffuse reflectance of visible light. Excitation of the CeO2:Eu3+ nanocrystal with 330 nm ultraviolet light was re-emitted via downconversion photoluminescence (PL) from 570 to 672 nm. Downconversion PL was dominant at 590 nm and had a maximum intensity for 1 mol % Eu3+. The CeO2:Eu3+ nanocrystal-based DSSCs exhibited a power conversion efficiency of 8.36%, an increase of 14%, compared with conventional DSSCs, because of the strong light-scattering and downconversion PL of the CeO2:Eu3+ nanocrystals. |
