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- W2078546521 abstract "Lithium acetylacetonate [Li(acac)] covered with aluminium was used as an efficient electron injection layer in organic light-emitting devices (OLEDs) consisting of NPB as the hole transport layer and Alq3 as the electron transport and light emitting layer, resulting in lower turn-on voltage and increased current efficiency. The turn-on voltage (the voltage at a luminance of 1 cd m−2) was decreased from 5.5 V for the LiF/Al and 4.4 V for Ca/Al to 4.0 V for Li(acac)/Al, and the device current efficiency was enhanced from 4.71 and 5.2 to 7.0 cd A−1. The performance tolerance to the layer thickness of Li(acac) is also better than that of the device with LiF. LiF can only be used when deposited as an ultra-thin layer because of its highly insulating nature, while the Li(acac) can be as thick as 5 nm without significantly affecting the EL performance. We suppose that the free lithium released from Li(acac) improves the electron injection when Li(acac) is covered with an Al cathode." @default.
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- W2078546521 date "2007-01-30" @default.
- W2078546521 modified "2023-09-28" @default.
- W2078546521 title "Improved electron injection in organic light-emitting devices with a lithium acetylacetonate [Li(acac)]/aluminium bilayer cathode" @default.
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- W2078546521 doi "https://doi.org/10.1088/0268-1242/22/3/013" @default.
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