OLEDs: Light my firefly

The Spectral Distribution of Firefly Light. II

The in vivo peak emission wavelengths of bioluminescence are reported for 15 species of American fireflies. A spectrophotometric study of the dorsal light organs of 155 specimens of the Jamaican firefly Pyrophorus plagiophthalamus showed three distinct color distributions with peak emission wavelengths at 550.1 +/- 1.5 mmicro, 556.8 +/- 1.4 mmicro, and 562.4 +/- 1.0 mmicro. Similar spectral mea...

The Spectral Distribution of Firefly Light

The in vivo emission spectra of sixteen species of Jamaican fireflies and four species of American fireflies have been measured with a photoelectric recording spectrometer. A simple technique of stimulation with ethyl acetate vapor was found to elicit bright continuous emission over a period of several minutes. Although the luciferin-luciferase cross-reactions were positive in all cases tested,...

Firefly luciferase can use L-luciferin to produce light.

L-Luciferin is a competitive inhibitor of firefly luciferase with a K1 between 3 and 4 microM. Furthermore L-luciferin can serve as an alternative substrate for light production. Catalysis of L-luciferin can be observed in the absence of, or at low concentrations of, D-luciferin. The light production from L-luciferin increases slowly (maximal half-time 8 min) to a stable plateau. At low concent...

A method to determine the presence of oxygen in organic light-emitting diodes (OLEDs)

Organic light emitting diodes (OLEDs) have great potential to replace current commercial display offerings. However, most of the materials comprising the OLEDs suffer degradation effects from the presence of environmental oxygen and water, as both compounds can penetrate into the device. Much research and effort have been put into fabrication methods and proper device encapsulation to help miti...

Investigation on internal electric field distribution of organic light-emitting diodes (OLEDs) with Eu2O3 buffer layer