Abstract
In this work, a series of eco-friendly solvent-processed all-polymer solar cells (APSCs) were fabricated by employing the sequentially spin-coating method. Two polymer donor materials PBQx-TCl and PM6 were deliberately selected due to their similar chemical structure, preferring to form the alloyed state for better exciton dissociation and hole transport in the layer-by-layer (LbL) APSCs. The better exciton dissociation between PBQx-TCl and PM6 can be confirmed from PL spectra of neat and blend films, as well as the short-circuit current densities (JSC) of special cells without acceptor layer. The optimized ternary LbL APSCs with 30 wt% PM6 in donor layer exhibit the power conversion efficiency (PCE) of 18.55 %, originating from the simultaneously improved JSC of 25.16 mA cm−2, open-circuit voltage (VOC) of 0.966 V, and fill factor of 76.33 %. The increased VOC of ternary LbL APSCs is mainly attributed to the decreased energy loss due to the good compatibility of the two polymer donors. The PCE of 18.55 % should be among the highest value for LbL APSCs processed by eco-friendly solvent.
Original language | English |
---|---|
Article number | 152558 |
Journal | Chemical Engineering Journal |
Volume | 493 |
DOIs | |
Publication status | Published - 2024 Aug 1 |
Bibliographical note
Publisher Copyright:© 2024 Elsevier B.V.
Keywords
- All-polymer solar cells
- Eco-friendly solvent
- Layer-by-layer
- Power conversion efficiency
- Ternary
ASJC Scopus subject areas
- General Chemistry
- Environmental Chemistry
- General Chemical Engineering
- Industrial and Manufacturing Engineering