Abstract
Two D-A type conjugated polymers bearing 3,4-dithiophenyl-1,2-squaraine as acceptor segment, thiophene and benzo[1,2-b;4,5-b′]dithiophene (BDT) as donor moieties, namely, PTTST and PBDTTST, are synthesized by Stille coupling reaction. Compared with their reference polymer PBDTTT without 1,2-squaraine unit, both PTTST and PBDTTST possess more extended absorption in the vis-NIR region of 600-800 nm and lowered HOMO energy levels of 0.1-0.2 eV. Bulk-heterojunction PSC with PBDTTST as p-type material shows high performance with the best PCE value of 1.26% (V oc=0.87 V, J sc=3.81 mA/cm 2, FF=0.38) under irradiation of 100 mW/cm 2, while that of PBDTTT-based PSC is 0.36%. Therefore, 1,2-squaraine is a promising electron-acceptor component for construction of high performance photovoltaic D-A type conjugated photovoltaic polymers. © 2012 Elsevier B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 220-228 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 105 |
| DOIs | |
| Publication status | Published - Oct 2012 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Research Keywords
- 1,2-squaraines
- Conjugated polymers
- Photovoltaic
- Solar cells
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