Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3669533
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Funding
- Korea Research Foundation
- Korean Government [KRF-2008-341-C00014]
- Korea Ministry of Knowledge Economy (MKE) [2008-N-PV08-P-01]
- Research Institute for Solar and Sustainable Energies (RISE)
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2011-0007069]
- National Research Foundation of Korea [2011-0007069] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Cross-sectional potential distributions of a polymer bulk heterojunction (BHJ) solar cell, consisting of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester blends, were directly observed by using Kelvin probe force microscopy. It was found that the bulk electric field of BHJ is nearly field-free compared with that of classical metal-insulator-metal model, whereas the electric field of BHJ device is confined to the cathode interface. The cathode-interfaced rectification junction is studied to originate from the formation of bilayered p-n junction in the BHJ. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3669533]
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