Tethered Trimeric Small‐molecular Acceptors through Aromatic‐core Engineering for Highly Efficient and Thermally Stable Polymer Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 7, 2024

Polymer solar cells (PSCs) rely on a blend of small molecular acceptors (SMAs) with polymer donors, where thermodynamic relaxation SMAs poses critical concerns operational stability. To tackle this issue, tethered SMAs, wherein multiple SMA-subunits are connected to the aromatic-core via flexible chains, proposed. This design aims an elevated glass transition temperature (T

Language: Английский

---

High efficiency and thermally stable ternary all-polymer solar cells achieved by alloyed vinyl-linked polymerized small-molecule acceptors

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109338 - 109338

Published: Jan. 25, 2024

Language: Английский

---

High-performance intrinsically stretchable organic solar cells based on flexible spacer incorporated dimerized small-molecule acceptors

Nano Energy, Journal Year: 2024, Volume and Issue: 125, P. 109541 - 109541

Published: March 26, 2024

Language: Английский

---

Simultaneous enhancement of efficiency, stability and stretchability in binary polymer solar cells with a three-dimensional aromatic-core tethered tetrameric acceptor

National Science Review, Journal Year: 2025, Volume and Issue: 12(3)

Published: Jan. 21, 2025

Polymer solar cells (PSCs) leverage blend films from polymer donors and small-molecule acceptors (SMAs), offering promising opportunities for flexible power sources. However, the inherent rigidity crystalline nature of SMAs often embrittle donor in constructed bulk heterojunction structure. To address this challenge, we improved stretchability by designing synthesizing a tethered giant tetrameric acceptor (GTA) with increased molecular weight that promotes entanglement individual SMA units. The key to design is using tetraphenylmethane as linking core create three-dimensional high C2 symmetry structure, which successfully regulates their aggregation relaxation behavior. With GTA acceptor, its PM6 exhibit significantly stretchability, nearly 150% increase crack onset strain value compared PM6:Y6. Moreover, PSCs achieve an efficiency up 18.71% demonstrate outstanding photostability, maintaining >90% initial conversion after operating over 1000 hours. Our findings specifically aligning weights more closely those counterparts, can enhanced without compromising morphological stability or device efficiency.

Language: Английский

---

Dredging photocarrier trapping pathways via “charge bridge” driven exciton–phonon decoupling enables efficient and photothermal stable quaternary organic solar cells

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3350 - 3362

Published: Jan. 1, 2023

The “charge bridge” strategy is applied to organic photovoltaic devices, which dredges photocarrier trapping pathways by facilitating exciton–phonon decoupling. This benefit leads simultaneous improvement of efficiency and photothermal stability.

Language: Английский

---