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- Title
Single Component Organic Solar Cells Based on Oligothiophene-Fullerene Conjugate.
- Authors
Nguyen, Thanh Luan; Lee, Tack Ho; Gautam, Bhoj; Park, Song Yi; Gundogdu, Kenan; Kim, Jin Young; Woo, Han Young
- Abstract
A new donor (D)-acceptor (A) conjugate, benzodithiophene-rhodanine-[6,6]-phenyl-C61 butyric acid methyl ester (BDTRh-PCBM) comprising three covalently linked blocks, one of p-type oligothiophene containing BDTRh moieties and two of n-type PCBM, is designed and synthesized. A single component organic solar cell (SCOSC) fabricated from BDTRh-PCBM exhibits the power conversion efficiency (PCE) of 2.44% and maximum external quantum efficiency of 46%, which are the highest among the reported efficiencies so far. The SCOSC device shows efficient charge transfer (CT, ≈300 fs) and smaller CT energy loss, resulting in the higher open-circuit voltage of 0.97 V, compared to the binary blend (BDTRh:PCBM). Because of the integration of the donor and acceptor in a single molecule, BDTRh-PCBM has a specific D-A arrangement with less energetic disorder and reorganization energy than blend systems. In addition, the SCOSC device shows excellent device and morphological stabilities, showing no degradation of PCE at 80 °C for 100 h. The SCOSC approach may suggest a great way to suppress the large phase segregation of donor and acceptor domains with better morphological stability compared to the blend device.
- Subjects
SOLAR cells; OLIGOTHIOPHENES; FULLERENES; BUTYRATES; ENERGY conversion; OPEN-circuit voltage
- Publication
Advanced Functional Materials, 2017, Vol 27, Issue 39, pn/a
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201702474