[1] Beijing Inst Technol, Sch Chem & Chem Engn, Beijing Key Lab Photoelect Electrophoton Convers, Key Lab Cluster Sci,Minist Educ China, Beijing 100081, Peoples R China
[2] Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China
[3] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect Er Mol Engn, Minist Educ, Beijing 100084, Peoples R China