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Updated: May 13, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
Direct observation of back energy transfer in blue phosphorescent materials for organic light emitting diodes by
H Hirayama1, Y Sugawara, Y Miyashita
1Analysis Technology Center, Fujifilm Corporation, 210, Nakanuma, Minamiashigara, Kanagawa, Japan.
Abstract:
We demonstrate a high-sensitive transient absorption technique for detection of excited states in an organic thin film by time-resolved optical waveguide spectroscopy. By using a laser beam as a probe light, we detect small change in the transient absorbance which is equivalent to 10-7 absorbance unit in a conventional method. This technique was applied to organic thin films of blue phosphorescent materials for organic light emitting diodes. We directly observed the back energy transfer from emitting guest molecules to conductive host molecules.
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