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13 September 2012 Role of the cathode interfacial layers in improving the stability of organic optoelectronic devices
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Abstract
We study the photo-stability of various organic/metal contacts under monochromatic illumination. The results show that the organic/metal contacts are susceptible to irradiation, leading to deteriorations in both charge injection (i.e. from the metal to the organic layer) and charge extraction (i.e. from the organic layer to the metal). As a result, the photo-stability of these organic/metal contacts plays an important role in the stability of organic light-emitting devices (OLEDs), where the photo-degradation is caused by the irradiation of device own electroluminescence (EL), and organic photodetectors (OPDs), where exposure to light is obviously a more relevant issue. It is also found that interfacial layers such as cesium carbonate (Cs2CO3) and lithium acetylacetonate (Liacac) can greatly improve the photo-stability of the organic/metal contacts, and thus improve the stability of organic optoelectronic devices such as OLEDs and OPDs.
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Qi Wang and Hany Aziz "Role of the cathode interfacial layers in improving the stability of organic optoelectronic devices", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84760D (13 September 2012); https://doi.org/10.1117/12.929111
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