Unsymmetrical substituted steric terfluorenes for solution-processed narrowband deep-blue organic light-emitting diodes with CIE_y = 0.06

Ningning Yu, Wenyu Chen, Mengyuan Li, Yingru Lin, Xinyu Du, Yingying Zheng, Jing Yang, Wenxin Huang, Zhiqiang Zhuo, Chuanxin Wei, Xiang An, Yamin Han, Lubing Bai, Jiewei Li, Xuehua Ding, Heyuan Liu, Man Xu, Wei Huang, Jinyi Lin