Color-stable deep red-emitting OLEDs based on a soluble terpolyrner containing fluorene, thiophene and benzothiadiazole units - Qu, Bo; Feng, Limin; Yang, Hongsheng; Gao, Zhi; Chao Gao; Chen, Zhijian; Xiao, Lixin; Qihuang Gong (SYNTHETIC METALS, 2012)