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A simple-structured benzo[1,2-b:4,5-b']dithiophene-based molecule as a third component enables organic solar cells with over 18.2% efficiency.
- Source :
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Dyes & Pigments . Sep2023, Vol. 217, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
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Abstract
- Research has shown that ternary strategy is an effective tool for improving the performance of organic solar cells (OSCs) and simple-structured small molecules with low-cost and wide bandgap which broadens the scope of the choice in third components recently attracted the attention of researchers. Herein, a small molecule with benzo[1,2-b:4,5-b']dithiophene (BDT) core named BR-C12 which mixed well with PM6 has been designed and synthesized. Incorporating BR-C12 as third component into PM6:Y6, BR-C12 exhibits a complementary absorption with PM6 and Y6, promoted exciton dissociation and charge collection, reduced bimolecular recombination, resulting in more ordered molecular packing. The PM6:Y6:BR-C12 (1:1.2:0.1, weight ratio) OSC shows an improved power conversion efficiency (PCE) of 17.02% in comparison to host binary devises (16.42%). In addition, by employing BR-C12 as third component into PM6:L8-BO, the ternary device based on PM6:L8-BO:BR-C12 also achieves significant enhancement in device photovoltaic performance with a PCE of 18.26%. In addition, BR-C12-added ternary devices exhibit improved stability than binary ones. This work presents a method for constructing high-performance ternary OSCs and enriches the abundance of materials for the third components. A simple-structured small molecule of BR-C12 is used as third component in the binary blends of PM6:Y6 and PM6:L8-BO to achieve efficient ternary solar cells with enhanced PCEs up to 17.02% and 18.26%, respectively. [Display omitted] • Simple-structured small molecule as cost-effective third component were studied for PM6:Y6 ternary OPV. • The small molecule has good compatibility with PM6 which improves blend morphology and enhances charge transport. • Third component-added ternary devices exhibit improved stability over binary ones. • The ternary OPV with blend of PM6:L8-BO:BR-C12 achieved a PCE of 18.26%. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOLAR cells
*SMALL molecules
*MOLECULES
Subjects
Details
- Language :
- English
- ISSN :
- 01437208
- Volume :
- 217
- Database :
- Academic Search Index
- Journal :
- Dyes & Pigments
- Publication Type :
- Academic Journal
- Accession number :
- 164257143
- Full Text :
- https://doi.org/10.1016/j.dyepig.2023.111423