Degradation Mechanisms and Reactions in Organic Light-Emitting Devices

Abstract

Figure 2. Typical normalized L−t curve, showing the experimental data (full circles), together with the fit using eq 2 up to 1100 h (dotted line), and up to 2200 h (full line). Reprinted with permission from ref 32.

Exploiting the Potential of OLED-Based Photo-Organic Sensors for Biotechnological Applications

“…1), since the OLED luminance varies with the current density over a considerable brightness range [20]. Many studies have addressed this topic [27,28]. Experimental results concur with this scaling law; L 0 and T 1/2 (also known as T 50 ) are the initial luminance (i.e., luminance at time t=0 h) and lifetime at 50% brightness loss compared to L 0 , respectively.…”

“…To improve the fitting accuracy, alternative functions such as the stretched exponential decay (SED) [28] correlation (equation 3, where τ and β denote the decay constant and stretching factor, respectively) have been developed to predict OLEDs' lifetime.…”

Review of organic light-emitting diodes with thermally activated delayed fluorescence emitters for energy-efficient sustainable light sources and displays

“…While red and green pixels rely on energy-efficient, phosphorescent materials, blue phosphorescent OLEDs never reached the necessary color purity and stability to allow for commercialization. It needs to be said that academic and industrial institutions tried to solve this issue with blue phosphorescent materials without success for the last 15 years, [94][95][96][97][98][99][100] suggesting that much like the low efficiency of fluorescent OLED materials, the instability of blue phosphorescent materials might be an intrinsic property and that innovative material concepts are required to close the bluegap. This means that as of today, no efficient and stable blue OLED pixels are available.…”

Photophysical and photochemical properties of a family of isoelectronic tris chelated ruthenium(ii) aza-/azo-aromatic complexes

“…34 However, nitrogen rich heterocyclic ligands, complexing with platinum, iridium and other transition metals, have been extensively used to synthesize light-emitting self-assembled materials. 35,36 In order to explore the activity of nitrogen rich heterocyclic ligands in electroluminescent devices, we developed three isomeric triazolopyridine ligands (L 1 -L 3 ) and their ionic ruthenium dye complexes with bipyridine or o-phenanthroline co-ligands.…”