Asymmetrified Benzothiadiazole‐Based Solid Additives Enable All‐Polymer Solar Cells with Efficiency Over 19 % DOI Open Access
Tianqi Chen,

Yanyi Zhong,

Tainan Duan

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 137(1)

Published: Aug. 24, 2024

Abstract Disordered polymer chain entanglements within all‐polymer blends limit the formation of optimal donor‐acceptor phase separation. Therefore, developing effective methods to regulate morphology evolution is crucial for achieving morphological features in organic solar cells (APSCs). In this study, two isomers, 4,5‐difluorobenzo‐ c ‐1,2,5‐thiadiazole (SF‐1) and 5,6‐difluorobenzo‐ (SF‐2), were designed as solid additives based on widely‐used electron‐deficient benzothiadiazole unit nonfullerene acceptors. The incorporation SF‐1 or SF‐2 into PM6 : PY‐DT blend induces stronger molecular packing via interaction, leading continuous interpenetrated networks with suitable phase‐separation vertical distribution. Furthermore, after treatment SF‐2, exciton diffusion lengths films are extended over 40 nm, favoring charge transport. asymmetrical characterized by an enhanced dipole moment, increases power conversion efficiency (PCE) PY‐DT‐based device 18.83 % due electrostatic interactions. Moreover, a ternary strategy boosts PCE SF‐2‐treated APSC 19 %. This work not only demonstrates one best performances APSCs but also offers approach manipulate using rational‐designed additives.

Language: Английский

Enhancing Organic Solar Cell Efficiency with Ester-Based Quinoxaline Non-Fullerene Acceptors in Ternary Blends DOI
Zhixin Liu,

Chunguang Zhu,

Jianpeng Xu

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110801 - 110801

Published: Feb. 1, 2025

Language: Английский

Citations

0
Balancing carrier mobility with solvent-solid hybrid additives for high-performance non-fullerene organic solar cells DOI
Shilin Liu, Haozhe Zhang, Hui Shen

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161037 - 161037

Published: Feb. 1, 2025

Language: Английский

Citations

0
Volatile Imide Additives with Large Dipole and Special Film Formation Kinetics Enable High‐Performance Organic Solar Cells DOI Open Access

Shuangshuang Xia,

Jie Xu, Zongtao Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N-(o-chlorophenyl)phthalimide (oClPA), N-(m-chlorophenyl)phthalimide (mClPA), N-(p-chlorophenyl)phthalimide (pClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for oClPA, 4.2361 mClPA, 4.7896 pClPA) compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high-quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP-eC9 treated pClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8-BO, PM6:Y6, D18:L8-BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.

Language: Английский

Citations

0
Volatile Imide Additives with Large Dipole and Special Film Formation Kinetics Enable High‐Performance Organic Solar Cells DOI Open Access

Shuangshuang Xia,

Jie Xu, Zongtao Wang

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Abstract Large dipole moment additives have strong interactions with the host materials, which can optimize morphology and improve photovoltaic performance of organic solar cells (OSCs). However, these are difficult to remove due their intermolecular interactions, may impair stability. Developing volatile large moments is challenging. Herein, we first report imide that could effectively OSCs through modification. Three N ‐( o ‐chlorophenyl)phthalimide ( ClPA), m p ClPA) were screened investigate effort positional isomerization on molecular configuration interaction. These (ClPAs) larger (2.0664 Debye for ClPA, 4.2361 4.7896 compared reported solid additives. In contrast traditional simultaneous nucleation crystal growth, ClPAs induce acceptor nucleate then grow, contributes forming high‐quality domains better crystallinity. To our knowledge, this unique film formation kinetics was first. The power conversion efficiency (PCE) based PM6:BTP‐eC9 treated ClPA improved from 16.13 % 18.58 %. Additive also performed well in PM6:L8‐BO, PM6:Y6, D18:L8‐BO systems, a high PCE 19.04 achieved. Our results indicate using unit construct simple effective strategy, halogen atom has effect performance.

Language: Английский

Citations

0
Suppressing Voltage Loss and Improving Charge Generation via Fluorinated Molecular Backbone of Low-Cost Polymers for Efficient Organic Solar Cells DOI
Xixi Zhang, Xin Wu, J.B. Zhang

et al.

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

High efficiency and low cost are indispensable for the industrialization of organic solar cells (OSCs), which urgently needs to be addressed. Herein, three simple-structure terpolymer donors, PTQ13-5, PTQ13-10, PTQ13-15, developed by embedding a simple fluorinated unit 3-fluorothiophene (T-F) into molecular backbone polymer PTQ10 pursue low-cost high-efficiency photovoltaic molecules. Three terpolymers show obviously characteristics due their short synthesis routes high total synthetic yields from cheap raw materials. The introduction T-F leads blue-shifted absorption, down-shifted HOMO levels, more favored aggregation morphology terpolymers, mainly strong electron-withdrawing property F atom, along with presence noncovalent F···H interactions. As result, PTQ13-5-based OSC achieves enhanced power conversion (PCE) 18.42% suppressed voltage loss (Vloss) because nonradiative 0.189 eV charge generation; this is one highest PCEs OSCs based on This work suggests that fluorination an effective strategy suppress Vloss improve generation OSCs, it offers rational guide in design molecules performance.

Language: Английский

Citations

0
200 nm Ultrathin Freestanding Organic Photovoltaics DOI Creative Commons

Jingyu Chang,

Zida Zheng,

Qianqing Jiang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Ultrathin organic photovoltaics (OPVs) have great application prospects in the field of wearable electronics, such as electronic tattoos, skins, etc. In this study, we report substrate-free ultrathin OPVs with a thickness approximately 200 nm. The freestanding OPV devices achieve power conversion efficiency 11.6% and power-per-weight ratio 109.4 W g–1, weight 1.06 g m–2. can self-adhere to various surfaces complex curved structures, ensuring excellent conformity. Notably, demonstrate remarkable mechanical flexibility, maintaining 90% their initial after 1000 compression-stretching cycles are capable bending radius less than 2 μm. These attributes make crucial advancement expanding landscape for electronics other special applications ultraflexible ultralight requests.

Language: Английский

Citations

0
Balanced Crystallization Enhances Morphology and Efficiency in Binary Organic Solar Cells DOI

Ni Gao,

Panpan Zhang,

Zhigang Xu

et al.

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

Published: April 21, 2025

Abstract Achieving high‐performance organic solar cells (OSCs) relies heavily on precise morphology optimization, a challenging task due to the intrinsic differences in crystallization kinetics and interfacial compatibility between polymer donors small‐molecule acceptors. In this work, 2,7‐dibromonaphthalene (DBN) is introduced as an innovative solid additive that uniquely regulates both donor acceptor phases within PM6:Y6 system. Unlike conventional liquid additives, which often induce excessive Y6 crystallization, DBN achieves balanced enhancing molecular order PM6 while mitigating over‐aggregation Y6. This dual‐phase effect improves light absorption, exciton generation dissociation, charge transport, reduces recombination losses. As result, OSCs treated with achieved remarkable power conversion efficiency (PCE) of 18.5%, open‐circuit voltage ( V OC ) 0.848 V, high short‐circuit current density J SC 28.15 mA cm −2 , enhanced fill factor (FF) 77.7%. Adding anti‐reflection MgF 2 layer further boosts 19.0%, setting new benchmark for binary devices. study establishes promising regulator presents robust strategy control, advancing development photovoltaic applications.

Language: Английский

Citations

0
18.18% Efficiency of Organic Solar Cells Based on PM6:Y6 with Syringic acid Modified ZnO DOI
Qiao Zheng,

Zhaohuang Guo,

Jinyong Zhuang

et al.

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106557 - 106557

Published: April 1, 2025

Language: Английский

Citations

0
In Situ Morphology Control for Solution‐Printable Organic Photovoltaics DOI Open Access
Zhaozhao Bi, Chang Liu, Wei Ma

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 27, 2024

Abstract The morphology of the photoactive layer plays an important role in both photoelectric effect and device performance solution‐processed organic solar cells (OSCs). Optimizing requires precise control over complex film formation kinetics, which are influenced by a range factors from solution state to solid‐film state. This review delves into situ characterization technologies employed understand active process explores strategies for controlling during key stages, including aggregation, nucleation, crystal growth, phase separation. Special attention is given mechanism these enable real‐time printing their potential facilitate direct layers with optimized morphology. goal offer valuable insights guidance managing kinetics OSCs, ultimately addressing challenges scale‐up paving way high‐throughput production post‐processing‐free devices.

Language: Английский

Citations

3
Effective Regulation of Morphologies and Exciton‐Generation Process Enables Quasi‐Planar All‐Polymer Organic Solar Cells Exceed 18% Efficiency DOI
Jiaying Wang, Tianqi Chen, Wenkai Zhao

et al.

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

Published: Sept. 27, 2024

Abstract Disordered polymer chain entanglements within all‐polymer blends limit the formation of optimal donor–acceptor phase separation, and thus performance organic solar cells (all‐PSCs). Considering challenge importance morphology regulation in all‐PSCs, a diluted layer‐by‐layer (N‐LBL) strategy is thereby adopted to fine‐tuning properties blends. When comparing traditional PM6:PY‐IT based bulk‐heterojunction (BHJ) film PM6/PY‐IT (LBL) film, N‐LBL which prepared from PM6 (with 3% PY‐IT) bottom layer PY‐IT 6% PM6) top layer, displayed clearer bi‐continuous fibrillar network higher exciton generation process. Benefiting these unique characters, all‐PSC consisting active exhibited short‐circuit current density over 26 mA cm −2 power conversion efficiency (PCE) 18.33%, are both than those BHJ (16.88%) LBL (17.13%) devices. Moreover, universality dilution other (PM6 PY‐DT, PY‐FT‐ o ) also demonstrated with unanimously improved device performance. This work underscores effectiveness method tuning morphologies charge dynamics for high‐performance all‐PSCs.

Language: Английский

Citations

3