The ternary hybrid thin films of poly[9,9'-di-n-octylfluorenyl-2,7-diyl] (PFO)/poly [2methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV)/2-butyl-6- (butylamino) benzo [de] isoquinoline-1,3-dione (F7GA) were successfully prepared with various ratios of F7GA. Dual Förster resonance energy transfer (FRET) from PFO to both F7GA and MEH-PPV was confirmed in the ternary thin films. The distance between PFO and F7GA molecules was smaller than the distance between PFO and MEH-PPV. Besides, white light emission was achieved with cascade energy transfer in this ternary blend system. The lifetime decay components of the acceptor emission were attributed to the presence of an exciplex between the molecules in the acceptor excited state and the donor ground state. In addition to the dual FRET, carrier trapping took place in the device, successfully realizing white organic light-emitting diodes (WOLEDs). The maximum luminance of 2295 cd/m² and a current density of 12.98 mA/cm² at CIE coordinates of (0.31, 0.24) was achieved with the device at 1.0 wt.% F7GA.

聚[9,9'-二-正辛基芴基-2,7-二基]（PFO）/聚[2甲氧基-5-（2-乙基-己氧基）-1,4-亚苯基亚乙烯基]（用各种比例的F7GA成功制备了MEH-PPV）/ 2-丁基-6-（丁基氨基）苯并[de]异喹啉-1,3-二酮（F7GA）。三元薄膜证实了从PFO到F7GA和MEH-PPV的双重Förster共振能量转移（FRET）。PFO和F7GA分子之间的距离小于PFO和MEH-PPV之间的距离。此外，在该三元混合系统中，通过级联能量转移实现了白光发射。受体发射的寿命衰减成分归因于在受体激发态和供体基态的分子之间存在激基复合物。除了双FRET之外，设备中还发生了载流子捕获，成功实现了白色有机发光二极管（WOLED）。最大亮度2295 cd / m^{如图2所示}，在1.0重量％的F7GA下，用CIE坐标（0.31、0.24）得到的电流密度为12.98mA / cm ²。