Single‐Junction Organic Photovoltaic Cell with 19% Efficiency

Advanced Materials, Год журнала: 2021, Номер 33(41)

Опубликована: Авг. 31, 2021

Abstract Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE 19.0% (certified value 18.7%) achieved in single‐junction OPV cells by combining material design with ternary blending strategy. An active layer comprising new wide‐bandgap polymer donor named PBQx‐TF and low‐bandgap non‐fullerene acceptor (NFA) eC9‐2Cl rationally designed. With optimized light utilization, resulting binary cell exhibits good 17.7%. NFA F‐BTA3 then added to as third component simultaneously improve parameters. The improved unitization, cascaded energy level alignment, enhanced intermolecular packing result open‐circuit voltage 0.879 V, short‐circuit current density 26.7 mA cm −2 , fill factor 0.809. This study demonstrates that further improvement PCEs high‐performance requires fine tuning electronic structures morphologies layers.

Язык: Английский

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Renewed Prospects for Organic Photovoltaics

Chemical Reviews, Год журнала: 2022, Номер 122(18), С. 14180 - 14274

Опубликована: Авг. 5, 2022

Organic photovoltaics (OPVs) have progressed steadily through three stages of photoactive materials development: (i) use poly(3-hexylthiophene) and fullerene-based acceptors (FAs) for optimizing bulk heterojunctions; (ii) development new donors to better match with FAs; (iii) non-fullerene (NFAs). The application NFAs an A–D–A configuration (where A = acceptor D donor) has enabled devices efficient charge generation small energy losses (Eloss < 0.6 eV), resulting in substantially higher power conversion efficiencies (PCEs) than FA-based devices. discovery Y6-type (Y6 2,2′-((2Z,2′Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]-thiadiazolo[3,4-e]-thieno[2″,3″:4′,5′]thieno-[2′,3′:4,5]pyrrolo-[3,2-g]thieno-[2′,3′:4,5]thieno-[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile) A–DA′ D–A further propelled the PCEs go beyond 15% due smaller Eloss values (∼0.5 eV) external quantum efficiencies. Subsequently, Y6-series single-junction increased >19% may soon approach 20%. This review provides update recent progress OPV following aspects: developments novel donors, understanding structure–property relationships underlying mechanisms state-of-the-art OPVs, tasks underpinning commercialization such as device stability, module development, potential applications, high-throughput manufacturing. Finally, outlook prospects section summarizes remaining challenges technology.

Язык: Английский

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Layer‐by‐Layer Processed Ternary Organic Photovoltaics with Efficiency over 18%

Advanced Materials, Год журнала: 2021, Номер 33(12)

Опубликована: Фев. 18, 2021

Abstract Obtaining a finely tuned morphology of the active layer to facilitate both charge generation and extraction has long been goal in field organic photovoltaics (OPVs). Here, solution resolve above challenge via synergistically combining layer‐by‐layer (LbL) procedure ternary strategy is proposed demonstrated. By adding an asymmetric electron acceptor, BTP‐S2, with lower miscibility binary donor:acceptor host PM6:BO‐4Cl, vertical phase distribution can be formed donor‐enrichment at anode acceptor‐enrichment cathode OPV devices during LbL processing. In contrast, LbL‐type OPVs based on PM6:BO‐4Cl still show bulk‐heterojunction like morphology. The formation not only reduce recombination but also promote collection, thus enhancing photocurrent fill factor OPVs. Consequently, exhibit best efficiency 18.16% (certified: 17.8%), which among highest values reported date for work provides facile effective approach achieving high‐efficiency expected morphologies, demonstrates as being promising fabricating from present laboratory study future industrial production.

Язык: Английский

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A History and Perspective of Non‐Fullerene Electron Acceptors for Organic Solar Cells

Advanced Energy Materials, Год журнала: 2021, Номер 11(15)

Опубликована: Янв. 14, 2021

Abstract Organic solar cells are composed of electron donating and accepting organic semiconductors. Whilst a significant palette donors has been developed over three decades, until recently only small number acceptors have proven capable delivering high power conversion efficiencies. In particular the fullerenes dominated landscape. this perspective, emergence family materials–the non‐fullerene (NFAs) is described. These delivered discontinuous advance in cell efficiencies, with milestone 20% now sight. Intensive international efforts synthetic chemistry established clear design rules for molecular engineering enabling an ever‐expanding efficiency candidates. However, these materials challenge accepted wisdom how work force new thinking areas such as morphology, charge generation recombination. This perspective provides historical context development NFAs, also addresses current plus considers important manufacturability criteria. There no doubt that NFAs propelled technology to efficiencies necessary viable commercial technology–but far can they be pushed, will deliver on equally metrics stability?

Язык: Английский

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Machine learning for high performance organic solar cells: current scenario and future prospects

Energy & Environmental Science, Год журнала: 2020, Номер 14(1), С. 90 - 105

Опубликована: Ноя. 26, 2020

In this review, current research status about the machine learning use in organic solar cell is reviewed. We have discussed challenges anticipating data driven material design.

Язык: Английский

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A-DA′D-A non-fullerene acceptors for high-performance organic solar cells

Science China Chemistry, Год журнала: 2020, Номер 63(10), С. 1352 - 1366

Опубликована: Июль 17, 2020

Язык: Английский

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16% efficiency all-polymer organic solar cells enabled by a finely tuned morphology via the design of ternary blend

Joule, Год журнала: 2021, Номер 5(4), С. 914 - 930

Опубликована: Март 7, 2021

Язык: Английский

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High-performance and eco-friendly semitransparent organic solar cells for greenhouse applications

Joule, Год журнала: 2021, Номер 5(4), С. 945 - 957

Опубликована: Март 19, 2021

Язык: Английский

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A Fully Non‐fused Ring Acceptor with Planar Backbone and Near‐IR Absorption for High Performance Polymer Solar Cells

Angewandte Chemie International Edition, Год журнала: 2020, Номер 59(50), С. 22714 - 22720

Опубликована: Авг. 31, 2020

Fused-ring electron acceptors have made significant progress in recent years, while the development of fully non-fused ring has been unsatisfactory. Here, two acceptors, o-4TBC-2F and m-4TBC-2F, were designed synthesized. By regulating location hexyloxy chains, formed planar backbones, m-4TBC-2F displayed a twisted backbone. Additionally, film showed markedly red-shifted absorption after thermal annealing, which indicated formation J-aggregates. For fabrication organic solar cells (OSCs), PBDB-T was used as donor blended with acceptors. The o-4TBC-2F-based blend films higher charge mobilities, lower energy loss power conversion efficiency (PCE). optimized devices based on gave PCE 10.26 %, much than those at 2.63 it is one highest reported values for

Язык: Английский

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Polymerized small molecular acceptor based all-polymer solar cells with an efficiency of 16.16% via tuning polymer blend morphology by molecular design

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Сен. 6, 2021

Abstract All-polymer solar cells (all-PSCs) based on polymerized small molecular acceptors (PSMAs) have made significant progress recently. Here, we synthesize two A-DA’D-A molecule acceptor PSMAs of PS-Se with benzo[c][1,2,5]thiadiazole A’-core and PN-Se benzotriazole A’-core, for the studies effect structure photovoltaic performance PSMAs. The possess broad absorption showing more red-shifted than suitable electronic energy levels application as polymer in all-PSCs PBDB-T donor. Cryogenic transmission electron microscopy visualizes aggregation behavior donor PSMA their solutions. In addition, a bicontinuous-interpenetrating network PBDB-T:PN-Se blend film size 10~20 nm is clearly observed by photoinduced force microscopy. desirable morphology active layer leads its all-PSC higher power conversion efficiency 16.16%.

Язык: Английский

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