Li, B.; Zhang, G.; Liang, Y.; Hao, Q.; Sun, J.; Zhou, C.; Tao, Y.; Yang, X.; Ren, Z. Femtosecond Time-Resolved Spectroscopic Photoemission Electron Microscopy for Probing Ultrafast Carrier Dynamics in Heterojunctions. Chinese. J. Chem. Phys. 2019, 32, 399-405.