Optimization of energy levels by molecular design: evaluation of bis-diketopyrrolopyrrole molecular donor materials for bulk heterojunction solar cells
Cited 37 times inCited 25 times in
- Optimization of energy levels by molecular design: evaluation of bis-diketopyrrolopyrrole molecular donor materials for bulk heterojunction solar cells
- Walker, Bright; Liu, Jianhua; Kim, Chunki; Welch, Gregory C.; Park, Jin Keun; Lin, Jason; Zalar, Peter; Proctor, Christopher M.; Seo, Jung Hwa; Bazan, Guillermo C.; Nguyen, Thuc-Quyen
- Bulk heterojunction; Bulk heterojunction solar cells; Device fabrications; Diketopyrrolopyrroles; Electrical potential; Electronic levels; Power conversion efficiencies; Solvent additives
- Issue Date
- ROYAL SOC CHEMISTRY
- ENERGY & ENVIRONMENTAL SCIENCE, v.6, no.3, pp.952 - 962
- We report a series of solution-processable, small-molecule, donor materials based on an architecture consisting of two diketopyrrolopyrrole (DPP) cores with different aromatic pi-bridges between the DPP units and different end-capping groups. In general, this architecture leads to desirable light absorption and electronic levels for donor materials. Out of the compounds investigated, a material with a hydrolyzed dithieno(3,2-b;2',3'-d)silole (SDT) core and 2-benzofuran (BFu) end capping groups leads to the most favorable properties for solar cells, capable of generating photocurrent up to 800 nm while producing an open-circuit voltage of over 850 mV, indicating a small loss in electrical potential compared to other bulk heterojunction systems. Device properties can be greatly improved through the use of solvent additives such as 2-chloronaphthalene and initial attempts to optimize device fabrication have resulted in power conversion efficiencies upwards of 4%.
- ; Go to Link
- Appears in Collections:
- ECHE_Journal Papers
- Files in This Item:
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.