LIGHT-EMITTING DIODE AND LIGHT-EMITTING DEVICE COMPRISING THE SAME

To provide a light-emitting diode in which holes and electrons are injected into a light emitting material layer in a well-balanced manner, luminous efficiency is improved, and which can be driven at low voltage, and a light emitting device comprising the same.SOLUTION: An inorganic compound is applied to a hole transfer layer 140 to remove an energy barrier between the hole transfer layer 140 and a light emitting material layer 150 and a light emitting diode 100 with improved hole transfer characteristics can be designed. Holes and electrons are moved and injected to the light emitting material layer 150 in a balanced manner, and charges injected to the light emitting material layer 150 emit light with a light emitting material that is located inside the light emitting material layer 150, not at the interface of the adjacent first charge transfer layers 140. Thus, the light emitting efficiency can be improved, and the light emitting diode 100 and a light emitting device which can be driven at low voltage can be embodied and manufactured.SELECTED DRAWING: Figure 2 【課題】発光物質層へ正孔と電子がバランスよく注入され、発光効率が向上し、低電圧駆動の可能な発光ダイオードおよびこれを備える発光装置を提供すること。【解決手段】無機化合物を正孔移動層１４０に適用して、正孔移動層１４０と発光物質層１５０との間のエネルギー障壁を取り除き、正孔移動特性の向上した発光ダイオード１００を設計することができる。正孔と電子が発光物質層１５０へバランスよく移動・注入され、発光物質層１５０に注入された電荷は、隣接した第１電荷移動層１４０の界面ではなく、発光物質層１５０の内部に位置する発光素材で発光する。これによって、発光効率が向上し、低電圧駆動が可能な発光ダイオード１００および発光装置を具現化・製造することができる。【選択図】図２