Depletion OLEDs

Figure 13-4. Encigy level diagnim of a single-layer OLED, where the organic malerial is depicted as a fully depleted semiconductor. The valence band Ey corresponds to the HOMO and the conduction band Ec corresponds to the LUMO. Tile Fermi levels of the two metal electrodes are marked as Et-. Upon contact a built-in potential is established and needs to be compensated for, before the device will begin to operating.

The general, incompatible-element depleted nature of the majority of MOREs and their sources is well explained by the extraction of the continental crust. Nevertheless, the bulk continental crust and the bulk of the MORE sources are not exact chemical complements. Rather, the residual mantle has undergone additional differentiation, most likely involving the generation of OlEs and their subducted equivalents. In addition, there may be more subtle differentiation processes involving smaller-scale melt migration occurring in the upper mantle (Donnelly et al., 2003). It is these additional differentiation processes that have... 

Nielsen, Ole John, Depletion of the Ozone Layer, in Air Pollution, Jes Fenger and Jens Christian Tjell, Eds., Royal Society of Chemistry, Cambridge, UK, 389-414, 2009. 

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