Optical second harmonic generation at heterojunction interfaces of a molybdenum trioxide layer and an organic layer
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概要
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We have observed optical second harmonic generation (SHG) from a space charge layer (SCL) in a stacked indium tin oxide (ITO)/molybdenum trioxide (MoO_3)/N−N′-diphenyl-N−N′-bis(1-naphthly)-1,1′-biphenyl-4,4′-diamine (α-NPD) system. When the MoO_3 thicknesses were increased, the SHG signals from this system decreased sharply at smaller MoO_3 thicknesses, and were saturated at MoO_3 thicknesses larger than 1 nm. These results prove the vital role of SCL in improvement of drive voltages of organic light-emitting diodes.
- 2010-11-08
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