Hybrid Semiconductor-Organic Electroluminesent Device

To date, studies of photoluminescence (PL) from mesoscopic semiconductors have focused on the size of the quantum dots. This effort places equal emphasis on the details of the nonlinear bonding dynamics of the elements comprising the dots. Nanotextured materials with nonlinear bonding dynamics develop energy localization phenomena that allow for selective excitation of vibrational modes that relax via the emission of visible light. Highly efficient and bright, hybrid semiconductor-organic electroluminescent (HSOE) devices can be fabricated in any given color by optimizing both properties. In current solid state light sources the semiconductor host must transport the electron hole pairs with high mobility and, in addition, must possess the proper band gap for the intended emission wavelength. These two properties are contradictory and result in limited efficiencies. In this effort the properties of charge transport and light emission have been decoupled such that the nonlinearly bonded nanodots are chelated to the surface of a sintered, nanotextured high mobility matrix. Electroluminescence (EL) emanates from these distributed emissive dots under 3 - 5 Volt dc making this approach immediately adaptable to TTL logic with pulse rates in excess of 100Hz. The simplicity of processing, low cost of materials and durability of the devices indicates that this nanometric EL approach is ideal for flat panel displays of arbitrary dimension.