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Small organic additive to improve the charge separation in an inverted bulk heterojunction organic photovoltaic
- Source :
- Organic Electronics. 13:2702-2708
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- A small organic molecule of 2,3-bis(5-bromothiophene-2-yl)acrylonitrile (DTDBAL) was synthesized for the first time and introduced into an active layer consisting of poly-3-hexylthiophene (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), in order to improve the performance of an inverted bulk heterojunction organic photovoltaic. The short-circuit current of the device was improved owing to the formation of a cascade band alignment of P3HT/DTDBAL/PCBM which enhanced the exciton dissociation and charge transport. Meanwhile, the open-circuit voltage and fill factor were simultaneously improved due to the optimization of the active layer morphology. The best power conversion efficiency achieved was 3.45% under simulated AM 1.5G illumination of 100 mW/cm 2 , which is an increase of 36% compared to a solar cell without the additive and featuring only P3HT/PCBM as the active layer.
- Subjects :
- Materials science
business.industry
Photovoltaic system
Energy conversion efficiency
General Chemistry
Condensed Matter Physics
Polymer solar cell
Electronic, Optical and Magnetic Materials
Active layer
law.invention
Biomaterials
chemistry.chemical_compound
chemistry
law
Cascade
Solar cell
Materials Chemistry
Optoelectronics
Electrical and Electronic Engineering
Acrylonitrile
business
Short circuit
Subjects
Details
- ISSN :
- 15661199
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Organic Electronics
- Accession number :
- edsair.doi...........bf3e103613f37665b9ee8f25beeb0c57