Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi''an 710062 China;
Frontier Institute of Science and Technology Xi''an Key Laboratory of Sustainable Energy Materials Chemistry Xi''an Jiaotong University Xi''an 710054 China;
perylene bisimide(PBI); spirofluorene; singlet oxygen; film-based photosensitizer;