Semitransparent organic photovoltaics for building-integrated photovoltaic applications

Nature Reviews Materials, Journal Year: 2022, Volume and Issue: 8(3), P. 186 - 201

Published: Dec. 2, 2022

Language: Английский

---

Molecular orientation-dependent energetic shifts in solution-processed non-fullerene acceptors and their impact on organic photovoltaic performance

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: April 4, 2023

The non-fullerene acceptors (NFAs) employed in state-of-art organic photovoltaics (OPVs) often exhibit strong quadrupole moments which can strongly impact on material energetics. Herein, we show that changing the orientation of Y6, a prototypical NFA, from face-on to more edge-on by using different processing solvents causes significant energetic shift up 210 meV. this OPV performance is investigated both bilayer and bulk-heterojunction (BHJ) devices with PM6 polymer donor. device electronic bandgap rate non-geminate recombination are found depend Y6 BHJ devices, attributed moment-induced band bending. Analogous shifts also observed other common polymer/NFA blends, correlates well NFA moments. This work demonstrates key quadruple molecular energetics thereby efficiency high-performance OPVs.

Language: Английский

---

Physical insights into non-fullerene organic photovoltaics

Nature Reviews Physics, Journal Year: 2024, Volume and Issue: 6(6), P. 365 - 381

Published: April 15, 2024

Language: Английский

---

Recent progress and prospects of dimer and multimer acceptors for efficient and stable polymer solar cells

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4674 - 4706

Published: Jan. 1, 2024

This review summarizes the recent progress, key design principles and prospects of dimer multimer acceptors for developing polymer solar cells (PSCs) with high efficiency long-term stability.

Language: Английский

---

Dissecting the structure-stability relationship of Y-series electron acceptors for real-world solar cell applications

Joule, Journal Year: 2023, Volume and Issue: 7(9), P. 2135 - 2151

Published: July 24, 2023

Language: Английский

---

Hexanary blends: a strategy towards thermally stable organic photovoltaics

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 1, 2023

Non-fullerene based organic solar cells display a high initial power conversion efficiency but continue to suffer from poor thermal stability, especially in case of devices with thick active layers. Mixing five structurally similar acceptors electron affinities, and blending donor polymer is explored, yielding up 17.6%. The hexanary device performance unaffected by annealing the bulk-heterojunction layer for at least 23 days 130 °C dark an inert atmosphere. Moreover, blends offer degree stability thickness 390 nm, which advantageous high-throughput processing cells. Here, generic strategy on multi-component acceptor mixtures presented that permits considerably improve non-fullerene thus paves way large-area

Language: Английский

---

A computational insight into enhancement of photovoltaic properties of non-fullerene acceptors by end-group modulations in the structural framework of INPIC molecule

Journal of Molecular Graphics and Modelling, Journal Year: 2023, Volume and Issue: 126, P. 108664 - 108664

Published: Nov. 2, 2023

Language: Английский

---

The Asymmetric Strategy of Small‐Molecule Materials for Organic Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: Feb. 8, 2024

Abstract The conjugated small‐molecule materials of organic solar cells have always played a crucial role in light‐harvesting, charge transport, morphology optimization, and the attainment efficient devices. advancement novel understanding underlying molecular design rules serve as driving force for furthering stable photovoltaic Among variety principles, symmetry‐breaking strategy, which is well developed 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d’]‐s‐indaceno[1,2‐b:5,6‐b’]dithiophene (ITIC)‐series acceptors, recently demonstrates great potential acceptors donors realizing high power conversion efficiency. In this review, order to give deep insight on asymmetric are systematically summarized with structure elucidate structure‐performance relationship, packing behaviors, evolution. Not only delicate balance between open circuit voltage short‐circuit current density, but also reductions recombination non‐radiative considered play key points improving performance when molecule used host or guest materials. Finally, concise challenges outlooks provided future development application molecules strategies.

Language: Английский

---

Charge generation in organic solar cells: Journey toward 20% power conversion efficiency

Aggregate, Journal Year: 2022, Volume and Issue: 3(6)

Published: Oct. 26, 2022

Abstract The power conversion efficiencies of organic solar cells (OSCs) have routinely lagged far behind those their inorganic counterparts. However, owing to the enormous contributions many researchers, OSCs rapidly improved and now exceed 19%. charge generation mechanisms in been heavily debated during this period while acquiring valuable knowledge. This review highlights fundamental cutting‐edge research that rationalizes why can generate photocurrent so efficiently. In particular, a photophysicist's views on exciton diffusion donor:acceptor interfaces, transfer at interface, long‐range spatial dissociation states are discussed. Although general consensus area has not reached yet, recent time‐resolved spectroscopic measurements provide important photophysical insights help achieving better understanding mechanism OSCs. Based these observations, future directions for realizing further improvements OSC performance

Language: Английский

---

Branched Alkoxy Side Chain Enables High-Performance Non-Fullerene Acceptors with High Open-Circuit Voltage and Highly Ordered Molecular Packing

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(5), P. 2059 - 2068

Published: Feb. 21, 2022

The linear alkyl chains on the β-position of thieno[3,2-b]thiophene units Y6 play a critical role in determining molecular properties non-fullerene acceptors (NFAs) and device performance corresponding organic solar cells (OSCs). This chain can be substituted with either alkoxy or branched side chains, which are two common strategies to modify property Y6-type molecules. In this paper, we use combination these by using develop new NFA named Y6-O2BO. Interestingly, substitution introduces different effects from previously used modifications. More ordered packing enhanced crystallinity observed for Y6-O2BO-based blend films, should beneficial charge carrier transportation. exhibits much open-circuit voltage (VOC) compared those based By mixture Y6-O2BO, VOC ternary devices linearly tuned between 0.84 0.96 V ratio acceptors. As result, optimal OSC yields an improved 0.88 high FF 0.79, leading maximum efficiency 17.5%. reveals effectiveness elevating further optimizing OSCs.

Language: Английский

---