Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 38, Pages 18789-18794Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp2036235
Keywords
-
Funding
- National Research Foundation of Korea
- Ministry of Education, Science, and Technology [2011-0015172]
- collaborative RD program [2010-advanced-B-015]
- National Research Foundation of Korea [2011-0015172] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
A series of small molecule based interlayer materials with different functional groups were synthesized and evaluated as cathode modifiers at the interface between the poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) active layer and Al cathode. The device performances of the organic solar cells (OSCs) were correlated with the interface properties between the small molecule interface modifiers and the Al cathode. High open circuit voltage (V-oc) was obtained in the OSC with highly polar phosphine oxide compound, while low V-oc was observed in the OSC with less polar phosphine chalconide interlayer. The interface between the interlayer and Al was analyzed with ultraviolet photoelectron spectroscopy, and the energy level shift at the interface was correlated with the V-oc and polarity of the interlayer. Highly polar phosphine oxide compound induced large energy level shift, while less polar phosphine chalconide compound induced small energy level shift at the interface. Therefore, the use of the highly polar interlayer was effective to improve the V-oc of OSCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available