​Professor Liu is currently active in Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Engineering Lab for Advanced Energy Technology, Shaanxi Normal University; and iChEM, Dalian Institute of Chemical Physics. He received his Ph. D. from Northwestern University, USA. His research focuses on perovskite solar cells and optoelectronic devices, single-crystalline perovskite materials and devices, photocatalyst and electrocatalyst materials. He has published more than 90 papers in peer-reviewed journals including Science, Nature and Nature Communications.​