Journal
IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume 9, Issue 3, Pages 400-406Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2009.2027120
Keywords
Calcium electrode; device annealing; fill factor (FF); incident light intensity; nanomorphology; polymer solar cells
Categories
Funding
- Korean Government [(NRF)-2009-0093819, 2009-0082820, NRF-20090072777, KETEP-2008-N-PV08-J-01-30202008, KOSEF-R01-2007-00010836-0, KRF-2007-331-D00121, KRF-2006-214-E00016]
- National Research Foundation of Korea [2009-0093819, 2007-0053412, 2007-331-D00121, 2009-0083009] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this paper, we report the effect of long annealing time device and the influence of incident light intensity on the performance of polymer solar cells prepared using a Ca/Al top electrode and a blend film of regioregular poly(3-hexylthiophene) and soluble fullerene as a photoactive layer. Results showed that the device performance exhibited a four-stage trend with annealing time, which was attributed to the continuous change of nanomorphology in blend films. In particular, the longest time annealing (300 min) did not degrade the device performance, thus indicating durability of the thin Ca electrode. Interestingly, an extremely high fill factor (76%-82%) was obtained at a low light intensity.
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