Cited by Tailoring selenium alkyl chain-containing small molecule donor enables efficient ternary solar cells with reduced charge recombination

Controlling the Third Component Distribution Toward High‐Efficient Ternary Organic Solar Cells DOI

Yutong Zhang, Yan Zhang, Xingpeng Liu

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Abstract Ternary organic solar cells (T‐OSCs) based on energy transfer can significantly boost the light absorption efficiency, thereby improving their power conversion efficiency (PCE). However, uncontrolled distribution of third component in bulk heterojunction (BHJ) device often results low ( E FRET ), and also tends to compromise interpenetrating network structure active layer. Herein, a localized deposition strategy is proposed establish with controlled (CDBHJ). Take PM6:Y6:IBC‐F for example, IBC‐F serves as donor PM6 acceptor. Compared BHJ‐based devices, proportion within phase increases from 25.1% 72.7%, enhancing 46.5% 66.8% CDBHJ‐based devices. Furthermore, improves crystallization separation kinetics during film‐forming process. Thus, exhibits superior exciton generation, diffusion, dissociation process, along higher more balanced charge transport. Consequently, achieves PCE 18.29%, which ranks among best PM6:Y6‐based T‐OSCs. This work demonstrates effectiveness controlling component, presenting an innovative pathway development highly efficient

Language: Английский

Citations

The Phase Separation Control in All‐Polymer Solar Cells DOI

Qiuju Liang, Zongcheng Miao, Xingpeng Liu

et al.

SusMat, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

ABSTRACT All‐polymer solar cells (all‐PSCs) are of interest owing to their unique advantages, including remarkably improved device stability and exceptional mechanical stretchability. Over recent years, there has been a notable increase in the power conversion efficiency (PCE) all‐PSCs, largely attributed advancements morphology control active layer. Notably, domain size is paramount importance as it impacts critical factors such exciton dissociation, charge transport, collection. However, low glass transition temperature conjugated polymers, coupled with minimal change mixing entropy, often results an excessive degree phase separation. Consequently, essential comprehend evolution separation develop strategies regulate size. In this review, we elucidate key parameters that contribute enhancement present qualitative quantitative characterization techniques for Building on foundation, introduce principles regulating sizes, encompassing crystallinity, miscibility, molecular conformation from thermodynamic perspective, well film‐forming kinetics crystallization sequence kinetic perspective. Lastly, offer insights into current challenges potential future prospects all‐PSCs.

Language: Английский

Citations

In‐Depth Investigation of Morphology Evolution in Highly Efficient Pseudo‐Planar Heterojunction All‐polymer Organic Photovoltaics DOI

Xingpeng Liu, Yutong Zhang,

Shaopeng Fu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Pseudo‐planar heterojunction (PPHJ) structure using sequential deposition is an effective method for achieving high‐efficiency organic photovoltaics (OPVs). The crystallization and phase separation behavior during film‐forming process intricately related to morphology with PPHJ structure. Despite this, the relationship between these two factors remains ambiguous, thereby impeding further improvements in performance. To tackle this challenge, PM6 PY‐DT all‐polymer systems as models are utilized, combine theoretical calculations, situ spectroscopy, morphological characterization elucidate aforementioned relationship. Thermodynamically, can effectively suppress van der Waals forces, increase crystallinity of PM6, promote matching crystallinity. Kinetically, rate notably faster more sustained, facilitating development interpenetrating network enhanced Furthermore, driven by crystallization‐induced‐phase separation, characterized minimal intermixed content substantial domain size. Concurrently, layer swells a limited extent, downward diffusion PY‐DT, which promotes formation vertical Ultimately, favorable achieved optimizing process, resulting power conversion efficiency (PCE) 18.08%, highest PCEs reported binary OPVs based on date.

Language: Английский

Citations

Boosting the performance of ternary solar cells by fine-tuning the distribution of the third component DOI

Yan Zhang, Jing Peng, Zemin He

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162693 - 162693

Published: April 1, 2025

Language: Английский

Citations

Rational halogenation on aromatic-core of tethered small molecule acceptors for high-performance polymer solar cells DOI

Yang Bai, Qi Chen, Qingyuan Wang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162657 - 162657

Published: April 1, 2025

Language: Английский

Citations

The Effects of Polymer Molecular Weight on Morphology and the Device Efficiency: Progress and Prospects for Organic Solar Cells DOI

Muhammad Saqib,

Xipeng Yin,

Zefeng Liu

et al.

Macromolecular Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Abstract Organic solar cells (OSCs) are developing as a crucial technology for sustainable energy, attaining power conversion efficiencies (PCEs) of over 20%. The morphology the active layer is essential in influencing PCE, but its exact manipulation difficult because complex interactions between donor and acceptor molecules. molecular weight ( M w ) polymers parameter that significantly affects morphological development, including domain size, purity, crystallinity, orientation. Here trade‐offs regulation examined, emphasizing high‐ improve stability crystallinity may hinder phase separation. In contrast, low‐ promote finer separation at cost mechanical integrity. Moreover, current achievements synthesized to clarify methodologies optimizing achieve balanced features, enhance design, maximize potential OSCs. These insights facilitate resolution existing difficulties advancements OSCs toward useful applications.

Language: Английский

Citations

Impact of the Torsion Angle in Y6-Backbone Acceptors on the Open-Circuit Voltage in Organic Solar Cells DOI

Yun Wang, Rongkun Zhou, Zilong Zheng

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 3157 - 3164

Published: March 20, 2025

In organic solar cells (OSCs), optimizing the molecular geometry is crucial for improving device efficiency by reducing recombination rates and maximizing charge transfer (CT) state energy. Understanding structure–property relationship regarding geometry, electronic structure, open-circuit voltage (Voc) essential. By employing dynamics simulations density functional theory calculations, we explored how intramolecular torsion angles (θ) between conjugated moieties impact Voc. Small θ promotes orbital energy degeneracy, CT (ECT) its energetic disorder (σCT). While a low ECT can increase non-radiative losses (ΔEnr), small σCT decreases ΔEnr. Balancing these effects essential to maximize value of – ΔEnr high L8-BO exhibits large θ, resulting in 1.17 eV PM6/L8-BO compared 1.04 PM6/Y6, while latter has 0.17 lower Consequently, achieved Voc 0.87 V, surpassing 0.81 V PM6/Y6. These findings were consistent with experimental 0.89 0.84 This study demonstrates role dihedral on OSC material design, as they significantly influence conjugation effect distribution.

Language: Английский

Citations

Tailoring selenium alkyl chain-containing small molecule donor enables efficient ternary solar cells with reduced charge recombination DOI

Gengsui Tian,

Yao Chen,

Dingqin Hu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 513, P. 163009 - 163009

Published: April 23, 2025

Language: Английский

Citations