Alkyl-chain branched effect on the aggregation and photophysical behavior of polydiarylfluorenes toward stable deep-blue electroluminescence and efficient amplified spontaneous emission

Lili Sun, Ning Sun, Lubing Bai, Xiang An, Bin Liu, Chen Sun, Lixiang Fan, Chuanxin Wei, Yamin Han, Mengna Yu, Jinyi Lin, Dan Lu, Ning Wang, Linghai Xie, Kang Shen, Xinwen Zhang, Yanan Xu, Juan Cabanillas-Gonzalez, Wei Huang