Ladder-type poly(indenofluorene-: Co -benzothiadiazole)s as efficient gain media for organic lasers: Design, synthesis, optical gain properties, and stabilized lasing properties

Si Ju Chang, Xu Liu, Ting Ting Lu, Yuan Yuan Liu, Jin Qiang Pan, Yi Jiang, Shuang Quan Chu, Wen Yong Lai, Wei Huang