Small molecules for OLEDs (organic light-emitting diodes) have more advanced performance properties than polymers do, but the deposition process is expensive and difficult to scale up. And the devices based on host-guest systems are limited by phase separation, intermolecular interaction, excimer formation, and so on. Thus, it is necessary to develop new materials for host-free devices based on solution-process. Herein, the multinuclear metal complexes which have two types of luminescent metal centers were synthesized to develop multifunctional light-emitting materials for host-free OLED based on solution-process. The aluminum complexes have band gap large enough to act as host. As a synthetic strategy to prepare heteronuclear metal complexes, the salen(^tBu)AlX (X=bridging ligand) and Ir(ppy)₃ derivatives were introduced as fluorescent emitters and phosphorescent emitters, respectively. Consequently, a set of heteronuclear metal materials containing Al/Ir based chromophores were prepared, and their luminescent properties were investigated. In this presentation, the syntheses, the luminescent properties, and the properties of OLED device will be discussed.