【摘 要】
：
A novel host-guest luminous system with enhanced near-UV light absorption thereby enhanced luminescence are designed based on the synergism of quantum confineme
【机 构】
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Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry
论文部分内容阅读
A novel host-guest luminous system with enhanced near-UV light absorption thereby enhanced luminescence are designed based on the synergism of quantum confinement,spatial confinement,and antenna effect,where ultrasmall Y2O3∶Eu3+ nanocrystals are fixed inside MOF (Eu/Y-BTC) as supporting structure.The Eu/Y-BTC not only limits the size and leads to lattice distortion of Y2O3∶Eu3+ nanocrystals and controls the distance between nanocrystals,but also promotes the light absorption and emission.The significantly red-shifted and broadened charge transfer band of Y2O3∶Eu3+/(Eu/Y-BTC) leads to the excellent applications of Y2O3∶Eu3+ in white light-emitting diodes (LEDs).Our results show that white light with superior color quality (CRI＞90) and extremely high luminous efficacy (an LER of 335 Im/W) could be achieved using Y2O3∶Eu3+/(Eu/Y-BTC) as red phosphor.The Y23∶Eu3+/(Eu/Y-BTC) also improves the photoelectric performance of dye-sensitized solar cells (DSSCs),not only because Y2O3∶Eu3+/(Eu/Y-BTC)has a large specific surface area and the adsorption amount of the dye is increased,but also because the valence band position of Y2O3∶Eu3+/(Eu/Y-BTC) is 2.41 eV,which can provide an additional energy level between the TiO2 and dye,promoting electron transfer.For these advantageous features,the multifunctional Y2O3∶Eu3+/(Eu/Y-BTC) composite product will open new avenues in white LEDs and DSSCs.
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