TY - JOUR
T1 - Stability comparison
T2 - A PCDTBT/PC 71BM bulk-heterojunction versus a P3HT/PC 71BM bulk-heterojunction
AU - Wang, Dong Hwan
AU - Kim, Jung Kyu
AU - Seo, Jung Hwa
AU - Park, O. Ok
AU - Park, Jong Hyeok
PY - 2012/6
Y1 - 2012/6
N2 - In this study, the physical and chemical degradation behaviors of active layers based on semicrystalline p-type polymer (poly(3-hexylthiophene) (P3HT)) and [6,6]-phenyl C 71 butyric acid methyl-ester (PC 71BM) are compared with the corresponding behaviors of amorphous p-type polymer of poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′, 7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and PC 71BM. A surface morphological study of the active layer (from Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images) and a chemical analysis (from X-ray photoelectron spectroscopy (XPS) and Energy dispersive X-ray spectroscopy (EDS) results) help explain why PCDTBT/PC 71BM bulk heterojunction (BHJ) has a higher level of long-term stability under thermal and air stability experimental conditions than a P3HT/PC 71BM-based BHJ. The power conversion efficiency for a PCDTBT/PC 71BM BHJ cell and a P3HT/PC 71BM BHJ cell decreased by 11% and 21%, respectively, after a thermal stability test and by 68% and 78%, respectively, after a 300 h air stability test.
AB - In this study, the physical and chemical degradation behaviors of active layers based on semicrystalline p-type polymer (poly(3-hexylthiophene) (P3HT)) and [6,6]-phenyl C 71 butyric acid methyl-ester (PC 71BM) are compared with the corresponding behaviors of amorphous p-type polymer of poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′, 7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and PC 71BM. A surface morphological study of the active layer (from Atomic force microscopy (AFM) and scanning electron microscopy (SEM) images) and a chemical analysis (from X-ray photoelectron spectroscopy (XPS) and Energy dispersive X-ray spectroscopy (EDS) results) help explain why PCDTBT/PC 71BM bulk heterojunction (BHJ) has a higher level of long-term stability under thermal and air stability experimental conditions than a P3HT/PC 71BM-based BHJ. The power conversion efficiency for a PCDTBT/PC 71BM BHJ cell and a P3HT/PC 71BM BHJ cell decreased by 11% and 21%, respectively, after a thermal stability test and by 68% and 78%, respectively, after a 300 h air stability test.
KW - Air stability
KW - Bulk heterojunction (BHJ)
KW - Degradation
KW - Morphological change
KW - Polymer solar cells
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=84862791458&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2012.02.005
DO - 10.1016/j.solmat.2012.02.005
M3 - Article
AN - SCOPUS:84862791458
SN - 0927-0248
VL - 101
SP - 249
EP - 255
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
ER -