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New Wide Bandgap Conjugated D-A Copolymers Based on BDT or NDT Donor Unit and Anthra[1,2-b:4,3,bʹ:6,7-cʺ]trithiophene-8-12-dione Acceptor for Fullerene-Free Polymer Solar Cellsстатья
- Авторы: Keshtov Mukhamed L., Konstantinov Igor O., Khokhlov Alexie R., Ostapov Ilya E., Godovsky Dimitri Y., Alekseev Vladimir G., Zou Yingping, Singhal Rahul, Singh Manish Kumar, Sharma Ganesh D.
- Журнал: Macromolecular Chemistry and Physics
- Год издания: 2022
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 2200168
- DOI: 10.1002/macp.202200168
- Аннотация: Two donor–acceptor (D-A) copolymers, P128 and P129, containingbenzodithiophene (BDT) and naphthiodithiophene (NDT) donor unit,respectively, and the alike anthra[1,2-b:4,3,bʹ:6,7-cʺ]trithiophene-8-12-dione(A3T) as an acceptor unit, are synthesized. The P129(NDT donor) exhibits enhanced chain planarity and linearity of backbonecompared to P128 (BDT donor), which leads to a considerable increase inboth the light-harvesting ability and hole mobility. In addition to it, theincorporation of the NDT unit creates a strong modification in themorphology with a well-mixed interpenetrating nanofibrillar network with anincreased donor–acceptor interface in the P129:Y6 bulk heterojunction activelayer that leads to a high short-circuit current density and fill factor. The powerconversion efficiency (PCE) of the improved polymer solar cells based onP128:Y6 and P129:Y6 is 6.25% and 14.55%, respectively. The negative HOMOoffset (−0.02 eV) at P128/Y6 interface restricts the hole transfer from Y6 toP128 and results in low value of short-circuit current and thereby poor PCE.Finally, the ternary PSCs are constructed with a weight ratio of 0.5:0.5between P128 and P129 and the weight component of Y6 is kept constant andthe PSC attains a PCE of 16.19%. This increase in the PCE can be attributed tothe formation of semiconducting alloy based on P128 and P129 donors andthe transformation of HOMO offset from negative (−0.02 eV for Y6/P128) topositive (0.04 eV for Y6/P128:P129).
- Добавил в систему: Кештов Мухамед Лостанбиевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Первая страница | Scan.2pdf.pdf | 531,5 КБ | 19 сентября 2022 [keshtov] | |
| 2. | благоданости | Scan.pdf | 569,5 КБ | 19 сентября 2022 [keshtov] | |
| 3. | Эксперное заключение | Scan.1pdf.pdf | 317,0 КБ | 19 сентября 2022 [keshtov] |