Monitoring the 3D nanostructures of bulk heterojunction polymer solar cells using confocal lifetime imaging.
In this study, the exciton lifetime images within the photoactive layers of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) are revealed by confocal optical microscopy combined with the fluorescence module. The images reveal that the active layers during slow solvent evaporation provide 3D pathways for charge transport and the concentration gradient through the film which reflects the better cell performance. This technique offers a great help to investigate the 3D optical-physical property without destroying the blends.
Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan 115.
Jen-Hsien
JH
Huang
Fan-Ching
FC
Chien
Peilin
P
Chen
Kuo-Chuan
KC
Ho
Chih-Wei
CW
Chu