Regiospecific Incorporation of Fluorine Atoms in Polythiophene Derivatives for Efficient Organic Solar Cells DOI
Tan Ngoc‐Lan Phan, Jin‐Woo Lee, Trieu Hoang‐Quan Nguyen

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(46), P. 63861 - 63870

Published: Nov. 9, 2024

Derivatives of polythiophene (PT) have garnered considerable attention in organic solar cells (OSCs) because their relatively uncomplicated molecular structures and cost-effective synthesis. Herein, we developed two regioisomeric fluorinated PT donors, PEI3T-FITVT PEI3T-FOTVT, to realize efficient OSCs. PEI3T-FOTVT are strategically designed with different fluorine atom arrangements on thiophene-vinyl-thiophene (TVT) units. Notably, possesses enhanced backbone planarity induced by F···S noncovalent interactions between constituent building blocks. Consequently, the higher aggregation crystalline properties leads a 2.5-fold increase hole mobility over (from 1.4 × 10–4 3.6 cm2 V–1 s–1). Furthermore, exhibits domain purity than PEI3T-FITVT, leading faster charge transport reduced recombination OSC devices. These characteristics lead power conversion efficiency 14.4% for PEI3T-FOTVT-based OSCs, compared 12.9% PEI3T-FITVT-based

Language: Английский

Binary All‐polymer Solar Cells with a Perhalogenated‐Thiophene‐Based Solid Additive Surpass 18 % Efficiency DOI

Wanying Feng,

Tianqi Chen, Yulu Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 3, 2024

Abstract Morphological control of all‐polymer blends is quintessential yet challenging in fabricating high‐performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable tuning the morphology polymer: small‐molecule improving performance and stability devices. Herein, three perhalogenated thiophenes, which are 3,4‐dibromo‐2,5‐diiodothiophene (SA‐T1), 2,5‐dibromo‐3,4‐diiodothiophene (SA‐T2), 2,3‐dibromo‐4,5‐diiodothiophene (SA‐T3), were adopted as SAs optimize cells (APSCs). For blend PM6 PY‐IT, benefitting from intermolecular interactions between thiophenes polymers, molecular packing properties could finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that assist morphological character evolution blend, leading their optimal morphologies. Compared as‐cast device : all SA‐treated binary devices displayed enhanced power conversion efficiencies 17.4–18.3 % with obviously elevated short‐circuit current densities fill factors. To our knowledge, PCE 18.3 for SA‐T1‐treated ranks highest among APSCs date. Meanwhile, universality SA‐T1 other demonstrated unanimously improved performance. This work provide a new pathway realizing APSCs.

Language: Английский

Citations

22
Insight Into Designing High‐Performance Polythiophenes for Reduced Urbach Energy and Nonradiative Recombination in Organic Solar Cells DOI
Zhe Sun,

Hayoung Ma,

Sangjin Yang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 18, 2024

Abstract In the pursuit of high‐efficiency polythiophene (PT) organic solar cells (OSCs), a critical challenge is reduction nonradiative recombination. This study comprehensively explores polydithienylthiazolothiazole (PTTz)‐based PT terpolymers: PTTz‐Tz and PTTz‐TzT, in which it demonstrate that molecular structure alterations greatly influence aggregation kinetics orientation these polymers. Specifically, PTTz‐TzT achieves rapid ordering during spin coating, effectively suppressing excessive polymer facilitating appropriate phase separation upon mixing with acceptor. Meanwhile, inherently adopts face‐on orientation, resulting more structured π–π stacking vertical direction after acceptor integration, compared to intrinsic edge‐on PTTz‐Tz. These factors collectively contribute lower Urbach energy substantial recombination PTTz‐TzT‐based OSCs, culminating high photovoltaic conversion efficiency (PCE) exceeding 16%. Furthermore, prominent PCE 19.11% obtained by via ternary blend strategy, among highest values reported for OSCs. investigation underscores significance PT‐based polymers, especially regarding recombination, offers novel insights designing high‐performance donors.

Language: Английский

Citations

17
Cyanoesterthiophene Based Low‐Cost Polymer Donors for High Efficiency Organic Solar Cells DOI
Junjie Wang,

Fuzhen Bi,

Li Du

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 11, 2024

Abstract To achieve commercial application of organic solar cells (OSCs), it is necessary to reduce material costs and improve device efficiency. This paper reports on the utilization a multifunctional building block, namely 3‐cyanoesterthiophene, which exhibits simple structure accessibility synthetic for cost‐effective high‐performance polymer donors (PDs). Meanwhile, ternary terpolymerization strategies have been studied. Two similar PDs, PBTCl0‐TCA PBTCl100‐TCA, are synthesized, devices exhibit less‐than‐satisfactory efficiency 13.21% 11.53% due mismatching energy level imperfect morphology. The two PDs with comparable structures commendable compatibility easily form alloy‐like phase in active layer, can effectively boost 14.17% retained high J SC significant improved open‐circuit voltage ( V OC ) fill factor (FF). Encouraged by blending phenomenon, donor (PBTCl50‐TCA) same ratio random designed. And over 17% binary OSCs using demonstrated. synergies incorporation cyanoester‐group terpolymer endow developed deep‐lying levels, face‐on orientation, thermodynamic miscibility prevailing nonfullerene acceptor appropriate crystallinity. findings study provide valuable insights support advancement PDs.

Language: Английский

Citations

15
Binary All‐polymer Solar Cells with a Perhalogenated‐Thiophene‐Based Solid Additive Surpass 18 % Efficiency DOI

Wanying Feng,

Tianqi Chen, Yulu Li

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(9)

Published: Jan. 3, 2024

Abstract Morphological control of all‐polymer blends is quintessential yet challenging in fabricating high‐performance organic solar cells. Recently, solid additives (SAs) have been approved to be capable tuning the morphology polymer: small‐molecule improving performance and stability devices. Herein, three perhalogenated thiophenes, which are 3,4‐dibromo‐2,5‐diiodothiophene (SA‐T1), 2,5‐dibromo‐3,4‐diiodothiophene (SA‐T2), 2,3‐dibromo‐4,5‐diiodothiophene (SA‐T3), were adopted as SAs optimize cells (APSCs). For blend PM6 PY‐IT, benefitting from intermolecular interactions between thiophenes polymers, molecular packing properties could finely regulated after introducing these SAs. In situ UV/Vis measurement revealed that assist morphological character evolution blend, leading their optimal morphologies. Compared as‐cast device : all SA‐treated binary devices displayed enhanced power conversion efficiencies 17.4–18.3 % with obviously elevated short‐circuit current densities fill factors. To our knowledge, PCE 18.3 for SA‐T1‐treated ranks highest among APSCs date. Meanwhile, universality SA‐T1 other demonstrated unanimously improved performance. This work provide a new pathway realizing APSCs.

Language: Английский

Citations

9
Improved charge transport based on donor-acceptor type solid additive with large dipole moment for efficient organic solar cells DOI
Rui Lin, Hui Zhou,

Xuee Xu

et al.

Dyes and Pigments, Journal Year: 2024, Volume and Issue: 224, P. 111980 - 111980

Published: Jan. 24, 2024

Language: Английский

Citations

9
Unraveling the electrical energy loss in silver nanowire electrodes for flexible and Large-Area organic solar cells DOI

Hao Ren,

Wei-Shuo Chen,

Jingde Chen

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148498 - 148498

Published: Jan. 4, 2024

Language: Английский

Citations

7
Polythiophene and its derivatives for all-polymer solar cells DOI

Qingqing Bai,

Yanxiang Cheng, Wei Wang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(27), P. 16251 - 16267

Published: Jan. 1, 2024

We review polythiophene and its derivative (PT)-based polymer donors for all-PSCs, focusing on material design, morphology optimization strategies, the selection design of acceptors that complement their properties.

Language: Английский

Citations

7
Nanoscale Balance of Energy Loss and Quantum Efficiency for High-Efficiency Polythiophene-Based Organic Solar Cells DOI

Zhe Sun,

Hayoung Ma,

Thi Le Huyen

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Polythiophene donors offer scalable and cost-effective solutions for the organic photovoltaic industry. A thorough understanding of structure–property–performance relationship is essential advancing polythiophene-based solar cells (PTOSCs) with high power conversion efficiencies (PCEs). Herein, we develop two polythiophene donors─PTTz-CN PTTz-CN(T2)─to verify energy loss–quantum efficiency relationship. The strong preaggregation property PTTz-CN improves quantum in spite nonradiative recombination loss, while PTTz-CN(T2) chains are weakly preaggregated, causing low efficiency, accompanied by loss though. Synergistically optimized achieved judiciously mixing PTTz-CN(T2), delivering outstanding PCEs up to 16.4% PTOSC system 19.6% an archetype a high-performing OSC containing optimal PTTz-CN:PTTz-CN(T2) composition. We highlight significance desirable balance between via molecular interaction tuning improve performances.

Language: Английский

Citations

6
Intramolecular Lock Conjugated Polymer Electrolytes as the Cathode Interfacial Layer for Nonfullerene Organic Solar Cells DOI

Jianwei Quan,

Dan Zhou,

Wentian Wan

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(9), P. 3851 - 3862

Published: Feb. 21, 2024

D–A polymers exhibit excellent intramolecular charge transfer (ICT) properties due to the differences in energy levels. However, bulky dihedral angles between D and A units with conjugated structures have a negative impact on process of ICT, which inhibits efficient electron transport adjacent units. To solve this problem, noncovalent conformational locks were constructed by introduction π-bridges. Intriguingly, thiophene π-bridges containing sulfur elements can form S─H locks, not only extend structure overcome steric hindrance but also enhance efficiency transport. Therefore, PFPy-TT PFPy-TTBT exhibited superior short-circuit density (JSC) compared PFPy-BT without locks. Meanwhile, benzothiazole moiety exhibits stronger ICT better extraction structure. The enhanced enable intermolecular performance, realizing power conversion (PCE) 16.15%. By constructing using cathode interfacial layers (CILs), problem inferior coplanarity is resolved, favorable molecular alignment promoted, while demonstrating exceptional storage, light, heat, air stability. device maintains over 80% its initial PCE value when stored nitrogen condition for 120 h. These advances hold promise improving film quality organic solar cells.

Language: Английский

Citations

6
Low‐Temperature Processed Efficient and Reproducible Blade‐Coating Organic Photovoltaic Devices with γ‐Position Branched Inner Side Chains‐Containing Nonfullerene Acceptor DOI Creative Commons

Donghoo Won,

So‐Huei Kang, Jaeyeong Park

et al.

Small Science, Journal Year: 2024, Volume and Issue: 4(7)

Published: April 15, 2024

Recent advancements in blade‐coating organic photovoltaic (OPV) devices utilizing eco‐friendly nonhalogenated solvents have demonstrated high power conversion efficiencies (PCEs) when processed at substrate temperatures. However, this method poses challenges device reproducibility and stability. Herein, a BTP‐eC9‐ γ nonfullerene acceptor (analogous to BTP‐eC9) with ‐position‐branched inner side chains within the BTP‐eC9‐based structural motif is developed. This pin‐sized extension branching position enhances solubility of toluene solvent. improvement not only mitigates excessive aggregation film state but also facilitates fabrication lower Optimized temperature 40 °C, ‐based achieve remarkable PCEs 16.43% (0.04 cm 2 ) 14.95% (1.0 ). Furthermore, these retain their uniformity which contributes superior reproducibility. attributed minimized alteration evolution kinetics fluid flow. These findings signify promising direction for industrial production OPV devices.

Language: Английский

Citations

6