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Efficient Non-polymeric Heterojunctions in Ternary Organic Solar Cells
- Source :
- ACS Applied Energy Materials. 1:4203-4210
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- We describe the use of a near IR non-fullerene low molecular weight organic semiconductor molecule, as electron acceptor, in combination with a wide band gap organic semiconductor electron donor, in efficient bulk heterojunction organic solar cells. The electron acceptor is a 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione-based molecule while the electron donor is a carbazole derivative. These two small molecules have complementary absorption spectra, and, thus, the heterojunction absorbs from 450 to 950 nm. The optimized photoactive layer shows power conversion efficiency of 7.44% under standard measurement conditions with an estimated energy loss as low as 0.55 eV. Identical solar cells, but using fullerene derivative, PC71BM, result in lower efficiency values (PCE = 5.07%) and greater energy losses (0.86 eV). The better performance of the non-fullerene-based small molecule organic solar cells is due to the higher LUMO energy level for the electron acceptor. Moreover, to improve further the efficiency of th...
- Subjects :
- chemistry.chemical_classification
Materials science
Organic solar cell
Energy conversion efficiency
Energy Engineering and Power Technology
Heterojunction
Electron donor
02 engineering and technology
Electron acceptor
010402 general chemistry
021001 nanoscience & nanotechnology
Photochemistry
01 natural sciences
Polymer solar cell
0104 chemical sciences
Organic semiconductor
chemistry.chemical_compound
Photoactive layer
chemistry
Materials Chemistry
Electrochemistry
Chemical Engineering (miscellaneous)
Electrical and Electronic Engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 25740962
- Volume :
- 1
- Database :
- OpenAIRE
- Journal :
- ACS Applied Energy Materials
- Accession number :
- edsair.doi...........b808274ce001e26fa8a679e2f44e442d