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High efficiency and stability in air of the encapsulation-free hybrid organic-inorganic light-emitting diode
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High efficiency and stability in an encapsulation-free hybridorganic-inorganiclight-emitting diode (HOILED) have been achieved by controlling the hole carrier concentration by the use of a cesium compound layer acting as a hole-blocking unit. The low efficiency and brightness of the conventional HOILED are caused by insufficient blocking on the titanium dioxide interface. Electroluminescence with high brightness ( at ) and efficiency ( at ) was observed. Higher than required emission reaching at can be observed after keeping the -free improved HOILED in air for .
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