Organic photovoltaic cell incorporating electron conducting exciton blocking layers
Patent
·
OSTI ID:1150826
The present disclosure relates to photosensitive optoelectronic devices including a compound blocking layer located between an acceptor material and a cathode, the compound blocking layer including: at least one electron conducting material, and at least one wide-gap electron conducting exciton blocking layer. For example, 3,4,9,10 perylenetetracarboxylic bisbenzimidazole (PTCBI) and 1,4,5,8-napthalene-tetracarboxylic-dianhydride (NTCDA) function as electron conducting and exciton blocking layers when interposed between the acceptor layer and cathode. Both materials serve as efficient electron conductors, leading to a fill factor as high as 0.70. By using an NTCDA/PTCBI compound blocking layer structure increased power conversion efficiency is achieved, compared to an analogous device using a conventional blocking layers shown to conduct electrons via damage-induced midgap states.
- Research Organization:
- University of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SC0001013
- Assignee:
- The Regents of the University of Michigan (Ann Arbor, MI)
- Patent Number(s):
- 8,816,332
- Application Number:
- 13/400,963
- OSTI ID:
- 1150826
- Country of Publication:
- United States
- Language:
- English
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