Effects of acetone-soaking treatment on the performance of polymer solar cells based on P3HT/PCBM bulk heterojunction

The improvement of the acetone-soaking treatment to the performance of polymer solar cells based on the P3HT/PCBM bulk heterojunction is reported. Undergoing acetone-soaking, the PCBM does not distribute uniformly in the vertical direction, a PCBM enrichment layer forms on the top of the active layer, which is beneficial to the collec- tion of the carriers and blocking the inverting diffusion carriers. X-ray photoelectron spectroscopy （XPS） analysis reveals that the PCBM weight ratio on the top of the active layer increases by 20% after the acetone-soaking treatment. Due to the nonuniform distribution of PCBM, the short-circuit current density, the open-circuit voltage, and the fill factor are enhanced significantly. Finally, the power conversion efficiency of the acetone-soaking device increases by 31% compared with the control device.     

气相色谱-质谱法测定烟用香精香料中香兰素和乙基香兰素

采用气相色谱-质谱法测定烟用香精香料中香兰素和乙基香兰素的含量。烟用香精香料样品与萃取剂的比例为1g比100mL,在500W下超声萃取10min。在气相色谱分离中用DBWAXETR毛细管柱为固定相,在质谱分析中采用选择离子监测模式。以丙酸苯乙酯为内标物。香兰素和乙基香兰素的线性范围均为0.5~200mg·L-1,检出限(3S/N)分别为0.03,0.02mg·kg-1。加标回收率在91.4%~109%之间,测定值的日内相对标准偏差(n=5)在0.43%~2.2%之间,日间相对标准偏差(n=5)在0.67%~2.6%之间。