Thermal emission of one-dimensional conjugated photonic crystals heterojunction embedded with graphene Yifan He, Liang Guo, Jincheng Li, Yihang Chen and Chengping Yin Eur. Phys. J. B, 92 3 (2019) 63 Published online: 25 March 2019 DOI: 10.1140/epjb/e2019-90611-3