Intrinsic Role of Volatile Solid Additive in High‐Efficiency PM6:Y6 Series Nonfullerene Solar Cells DOI

Xue Yang,

Bin Li, Xuliang Zhang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(24)

Published: March 16, 2023

Organic nonfullerene solar cells (ONSCs) have made unprecedented progress; however, morphology optimization of ONSCs is proven to be particularly challenging relative classical fullerene-based devices. Here, a novel volatile solid additive (VSA), 2-hydroxy-4-methoxybenzophenone (2-HM), reported for achieving high-efficiency ONSCs. 2-HM functions as universal morphology-directing agent several well-known PM6:Y6 series blends, viz. PM6:Y6, PM6:BTP-eC9, PM6:L8-BO, leading best efficiency 18.85% at the forefront binary VSAs recently emerged, while intrinsic kinetics still unclear. Herein, set in situ and ex characterizations employed first illustrate molecule-aggregate-domain transition dynamic process assisted by VSA. More specifically, role individual donor PM6 acceptor Y6 systems unlocked, function altering bulk heterojunction blends further revealed enhanced photovoltaic performance. It believed that achievement brings not only deep insight into emerging additive, but also new hope improve molecular ordering, film microstructure, relevant performance

Language: Английский

In Situ Removable Additive Assisted Organic Solar Cells Achieving Efficiency over 19% and Fill Factor Exceeding 81% DOI

Lingchen Kong,

Zesheng Zhang, Ningjiu Zhao

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(25)

Published: May 24, 2023

Abstract Additive engineering can precisely regulate the bulk‐heterojunction active layer morphology with ideal domain size and purity, playing a critical role in development of organic solar cells (OSCs). Herein, two solid additives, 1,4‐dichlorobenzene (DCB) 1‐chloro‐4‐iodobenzene (CIB), low melting point (mp.) ≈52 °C, are investigated comprehensively comparison to 1,4‐diiodobenzene (DIB, mp. 131 °C). After spin‐coating, DIB residue is found as‐cast PM6:BTP‐eC9 based blend film, whereas DCB CIB completely removed during showing situ removable properties that enable convenient processing. In OSCs, DCB‐ CIB‐processed layers afford power‐conversion efficiencies (PCEs) 18.2% 18.4%, respectively, all higher than 17.8% for DIB. Among three most effective enhancements absorption coefficients donor acceptor, affording fast more balanced carrier transports, suppressing recombination. Of particular note, provide some universality as an additive, on its elevations PCEs several binary PM6:D18‐Cl:L8‐BO ternary layers. Impressively, prominent PCE 19.1% remarkable fill factor 81.1% achieved layer. This work demonstrates potential additive high‐efficiency OSCs.

Language: Английский

Citations

103
19.28% Efficiency and Stable Polymer Solar Cells Enabled by Introducing an NIR‐Absorbing Guest Acceptor DOI
Qunping Fan, Ruijie Ma, Zhaozhao Bi

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(8)

Published: Jan. 6, 2023

Abstract Here, a near‐infrared (NIR)‐absorbing small‐molecule acceptor (SMA) Y‐SeNF with strong intermolecular interaction and crystallinity is developed by combining selenophene‐fused core naphthalene‐containing end‐group, then as custom‐tailor guest incorporated into the binary PM6:L8‐BO host system. shows 65 nm red‐shifted absorption compared to L8‐BO. Thanks of Y‐SeNF, morphology PM6:L8‐BO:Y‐SeNF can be precisely regulated introducing achieving improved charge‐transporting suppressed non‐radiative energy loss. Consequently, ternary polymer solar cells (PSCs) offer an impressive device efficiency 19.28% both high photovoltage (0.873 V) photocurrent (27.88 mA cm −2 ), which one highest efficiencies in reported single‐junction PSCs. Notably, PSC has excellent stability under maximum‐power‐point tracking for even over 200 h, better than its parental devices. The study provides novel strategy construct NIR‐absorbing SMA efficient stable PSCs toward practical applications.

Language: Английский

Citations

102
Electrostatic force promoted intermolecular stacking of polymer donors toward 19.4% efficiency binary organic solar cells DOI Creative Commons

Zirui Gan,

Liang Wang,

Jinlong Cai

et al.

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

Published: Oct. 9, 2023

Conjugated polymers are generally featured with low structural order due to their aromatic and irregular units, which limits light absorption charge mobility in organic solar cells. In this work, we report a conjugated molecule INMB-F that can act as molecular bridge via electrostatic force enhance the intermolecular stacking of BDT-based polymer donors toward efficient stable Molecular dynamics simulations synchrotron X-ray measurements reveal electronegative adsorb on electropositive main chain increase donor-donor interactions, leading enhanced shortened π-π distance consequently transport ability. Casting non-fullerene acceptor layer top modified donor fabricate cells layer-by-layer deposition evidences significant power conversion efficiency boosts range photovoltaic systems. A 19.4% (certified 18.96%) is realized PM6/L8-BO binary devices, one highest reported efficiencies material system. The by also leads six-fold enhancement operational stability

Language: Английский

Citations

98
16.52% Efficiency All‐Polymer Solar Cells with High Tolerance of the Photoactive Layer Thickness DOI Creative Commons
Wenqing Zhang, Chenkai Sun, Indunil Angunawela

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(20)

Published: March 15, 2022

All-polymer solar cells (all-PSCs) have drawn growing attention and achieved tremendous progress recently, but their power conversion efficiency (PCE) still lags behind small-molecule-acceptor (SMA)-based PSCs due to the relative difficulty on morphology control of polymer photoactive blends. Here, low-cost PTQ10 is introduced as a second donor (a third component) into PM6:PY-IT blend finely tune energy-level matching microscopic layer. The addition decreases π-π stacking distance, increases coherence length ordered face-on molecular packing orientation, which improves charge separation transport in Moreover, deeper highest occupied orbital energy level than PM6 leads higher open-circuit voltage ternary all-PSCs. As result, PCE 16.52% for all-PSCs, one PCEs In addition, devices exhibit high tolerance layer thickness with 15.27% 13.91% at ≈205 ≈306 nm, respectively, are so far all-PSCs thick

Language: Английский

Citations

90
High performance polymerized small molecule acceptor by synergistic optimization on π-bridge linker and side chain DOI Creative Commons
Guangpei Sun,

Xin Jiang,

Xiaojun Li

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Sept. 7, 2022

The polymerized small-molecule acceptors have attracted great attention for application as polymer acceptor in all-polymer solar cells recently. modification of small molecule building block and the π-bridge linker is an effective strategy to improve photovoltaic performance acceptors. In this work, we synthesized a new PG-IT2F which representative PY-IT by replacing its upper linear alkyl side chains on with branched attaching difluorene substituents thiophene linker. Through synergistic optimization, possesses more suitable phase separation, increased charge transportation, better exciton dissociation, lower bimolecular recombination, longer transfer state lifetime than their PM6 donor. Therefore, devices based PM6:PG-IT2F demonstrated high power conversion efficiency 17.24%, one highest reported binary all date. This work indicates that regulation plays key role designing developing highly efficient

Language: Английский

Citations

90
Restrained energetic disorder for high-efficiency organic solar cells via a solid additive DOI

Zhihao Chen,

Huifeng Yao, Jingwen Wang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(6), P. 2637 - 2645

Published: Jan. 1, 2023

A new morphology regulation approach using solid additive, 1,3,5-trimethoxybenzene, can restrict energetic disorder and optimize the nanoscale of organic solar cells, achieves a high power conversion efficiency 19.30%.

Language: Английский

Citations

87
Reducing Photovoltaic Property Loss of Organic Solar Cells in Blade‐Coating by Optimizing Micro‐Nanomorphology via Nonhalogenated Solvent DOI
Jiayou Zhang, Lifu Zhang,

Xinkang Wang

et al.

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(14)

Published: March 7, 2022

Abstract Blade‐coating which is compatible with roll‐to‐roll (R2R) fabrication has been considered a promising technology for the large‐scale production of organic solar cells (OSCs). Despite rapid increase in power conversion efficiency (PCE) devices, most processing solvents are still halogenated, key issue that needs to be addressed urgently commercialized manufacturing. In this work, targeted strategies explored preparation efficient OSCs via combining nonhalogenated solvent toluene (TL) blade‐coating. Based on situ UV–vis absorption, grazing‐incidence wide‐angle X‐ray scattering, and device performance measurements, subtle relationship between solvents, film morphology, properties successfully established. The PM6:BTP‐eC9 blend prepared by strategy demonstrates higher crystallinity smaller phase separation resulting an outstanding PCE 16.58% low energy loss high fill factor, than CF‐based (15.08%). Finally, 1.00 cm 2 exhibits 14.82%, one highest values blade‐coating based TL solvent. This specific combines shows synergy optimization demonstrating excellent potential highly large area OSCs.

Language: Английский

Citations

81
Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17% DOI
Jianghao Jin,

Qiao Wang,

Kaige Ma

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(14)

Published: Jan. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Language: Английский

Citations

74
Pushing the Efficiency of High Open‐Circuit Voltage Binary Organic Solar Cells by Vertical Morphology Tuning DOI
Guilong Cai, Zeng Chen, Xinxin Xia

et al.

Advanced Science, Journal Year: 2022, Volume and Issue: 9(14)

Published: March 21, 2022

The tuning of vertical morphology is critical and challenging for organic solar cells (OSCs). In this work, a high open-circuit voltage (V

Language: Английский

Citations

72
Film-formation dynamics coordinated by intermediate state engineering enables efficient thickness-insensitive organic solar cells DOI

Xin Song,

Hao Xu, Xinyu Jiang

et al.

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3441 - 3452

Published: Jan. 1, 2023

In this work, by adding a low-cost and volatile 1,3,5-tribromobenzene solid as process-aid additive, champion power conversion efficiency high 19.1% together with remarkable fill factor of 80.7% is achieved based on the state-of-the-art PM6:L8-BO system.

Language: Английский

Citations

72