Stability of polymer solar cells.
Organic photovoltaics (OPVs) evolve in an exponential manner in the two key areas of efficiency and stability. The power conversion efficiency (PCE) has in the last decade been increased by almost a factor of ten approaching 10%. A main concern has been the stability that was previously measured in minutes, but can now, in favorable circumstances, exceed many thousands of hours. This astonishing achievement is the subject of this article, which reviews the developments in stability/degradation of OPVs in the last five years. This progress has been gained by several developments, such as inverted device structures of the bulk heterojunction geometry device, which allows for more stable metal electrodes, the choice of more photostable active materials, the introduction of interfacial layers, and roll-to-roll fabrication, which promises fast and cheap production methods while creating its own challenges in terms of stability.
Risø National Laboratory for Sustainable Energy, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
Mikkel
M
Jørgensen
Kion
K
Norrman
Suren A
SA
Gevorgyan
Thomas
T
Tromholt
Birgitta
B
Andreasen
Frederik C
FC
Krebs
D011211:Electric Power Supplies; D004867:Equipment Design; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy
D011108:Polymers