Recent Advances in Single‐Junction Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(37)

Опубликована: Июль 20, 2022

Single-junction organic solar cells (OSCs) have made significant progress in recent years. Innovations material design and device optimization improved the power conversion efficiencies to over 19 %. In this Minireview, based on advances, we discuss molecular strategies tune absorption spectrum, energy level, intermolecular aggregation as well highlight role of electrostatic potential decreasing loss. Then, introduce latest four types OSCs composed different donor:acceptor combinations: polymer donor:small-molecule acceptor, all-polymer, all-small-molecule, small-molecule donor:polymer acceptor. Finally, challenges practical applications, including cost, stability, multi-function integration, are discussed.

Язык: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(5), С. 2350 - 2387

Опубликована: Янв. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Язык: Английский

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18.9% Efficient Organic Solar Cells Based on n‐Doped Bulk‐Heterojunction and Halogen‐Substituted Self‐Assembled Monolayers as Hole Extracting Interlayers

Advanced Energy Materials, Год журнала: 2022, Номер 12(45)

Опубликована: Окт. 3, 2022

Abstract The influence of halogen substitutions (F, Cl, Br, and I) on the energy levels self‐assembled hole‐extracting molecule [2‐(9 H ‐Carbazol‐9‐yl)ethyl]phosphonic acid (2PACz), is investigated. It found that formation monolayers (SAMs) [2‐(3,6‐Difluoro‐9 ‐carbazol‐9‐yl)ethyl]phosphonic (F‐2PACz), [2‐(3,6‐Dichloro‐9 (Cl‐2PACz), [2‐(3,6‐Dibromo‐9 (Br‐2PACz), [2‐(3,6‐Diiodo‐9 (I‐2PACz) directly indium tin oxide (ITO) increases its work function from 4.73 eV to 5.68, 5.77, 5.82, 5.73 eV, respectively. Combining these ITO/SAM electrodes with ternary bulk‐heterojunction (BHJ) system PM6:PM7‐Si:BTP‐eC9 yields organic photovoltaic (OPV) cells power conversion efficiency (PCE) in range 17.7%–18.5%. OPVs featuring Cl‐2PACz SAMs yield highest PCE 18.5%, compared F‐2PACz (17.7%), Br‐2PACz (18.0%), or I‐2PACz (18.2%). Data analysis reveals enhanced performance Cl‐2PACz‐based relates increased hole mobility, decreased interface resistance, reduced carrier recombination, longer lifetime. Furthermore, show stability under continuous illumination ITO/PEDOT:PSS‐based cells. Remarkably, introduction n‐dopant benzyl viologen into BHJ further boosted ITO/Cl‐2PACz a maximum value 18.9%, record‐breaking for SAM‐based par best‐performing reported date.

Язык: Английский

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Device Performance of Emerging Photovoltaic Materials (Version 3)

Advanced Energy Materials, Год журнала: 2022, Номер 13(1)

Опубликована: Дек. 9, 2022

Abstract Following the 2nd release of “Emerging PV reports,” best achievements in performance emerging photovoltaic devices diverse research subjects are summarized, as reported peer‐reviewed articles academic journals since August 2021. Updated graphs, tables, and analyses provided with several parameters, e.g., power conversion efficiency, open‐circuit voltage, short‐circuit current density, fill factor, light utilization stability test energy yield. These parameters presented a function bandgap average visible transmittance for each technology application, put into perspective using, detailed balance efficiency limit. The 3rd installment reports” extends scope toward triple junction solar cells.

Язык: Английский

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Balancing the Selective Absorption and Photon‐to‐Electron Conversion for Semitransparent Organic Photovoltaics with 5.0% Light‐Utilization Efficiency

Advanced Materials, Год журнала: 2022, Номер 34(41)

Опубликована: Авг. 24, 2022

Efficiently converting invisible light while allowing full visible transmission is key to achieving high-performance semitransparent organic photovoltaics (ST-OPVs). Here, a detailed balance strategy explored optimize the ST-OPV via taking both absorption and carrier dynamics into consideration. Based on this principle, comprehensive optimizations are carried out, including ternary strategy, donor:acceptor blend ratio, thickness, antireflection, etc., compromise energy conversion for ST-OPVs. As result, opaque OPV device exhibits champion power efficiency of 19.35% (certificated 19.07%), most strikingly, best shows remarkably high light-utilization 5.0%, where average 12.95% 38.67%, respectively. An 12.09% achieved upscaled with an area 1.05 cm2 , demonstrating its promise large-area fabrication. These results among values Besides, it demonstrated that good infrared light-reflection capability thermal control. This work provides rational design balancing absorbing selectivity photon-to-electron ST-OPVs, may pave way toward practical application solar windows.

Язык: Английский

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Giant Molecule Acceptor Enables Highly Efficient Organic Solar Cells Processed Using Non‐halogenated Solvent

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(26)

Опубликована: Апрель 26, 2023

High efficiency organic solar cells (OSCs) based on A-DA'D-A type small molecule acceptors (SMAs) were mostly fabricated by toxic halogenated solvent processing, and power conversion (PCE) of the non-halogenated processed OSCs is mainly restricted excessive aggregation SMAs. To address this issue, we developed two vinyl π-spacer linking-site isomerized giant (GMAs) with linking inner carbon (EV-i) or out (EV-o) benzene end group SMA longer alkyl side chains (ECOD) for capability solvent-processing. Interestingly, EV-i possesses a twisted molecular structure but enhanced conjugation, while EV-o shows better planar weakened conjugation. The OSC as acceptor o-xylene (o-XY) demonstrated higher PCE 18.27 % than that devices ECOD (16.40 %) (2.50 %). one highest PCEs among from solvents so far, benefitted suitable structure, stronger absorbance high charge carrier mobility EV-i. results indicate GMAs site would be excellent candidates fabricating performance solvents.

Язык: Английский

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Semi-transparent organic photovoltaics

Chemical Society Reviews, Год журнала: 2023, Номер 52(13), С. 4132 - 4148

Опубликована: Янв. 1, 2023

This tutorial review summarizes the basic concepts, design strategies and potential applications of semi-transparent organic photovoltaics (STOPVs). Challenges research directions toward commercialization STOPVs are also proposed.

Язык: Английский

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Impact of Electrostatic Interaction on Non‐radiative Recombination Energy Losses in Organic Solar Cells Based on Asymmetric Acceptors

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(35)

Опубликована: Июль 11, 2023

Reducing non-radiative recombination energy loss (ΔE3 ) is one key to boosting the efficiency of organic solar cells. Although recent studies have indicated that Y-series asymmetric acceptors-based devices featured relatively low ΔE3 , understanding mechanism derived from molecular structure change still lagging behind. Herein, two acceptors named BTP-Cl and BTP-2Cl with different terminals were synthesized make a clear comparative study symmetric acceptor BTP-0Cl. Our results suggest exhibit larger difference electrostatic potential (ESP) in semi-molecular dipole moment, which contributes form stronger π-π interaction. Besides, experimental theoretical reveal lower ESP-induced intermolecular interaction can reduce distribution PM6 near interface enhance built-in decrease charge transfer state ratio for acceptors. Therefore, achieve higher exciton dissociation . This work establishes structure-performance relationship provides new perspective understand state-of-the-art

Язык: Английский

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Non‐Halogen Solvent Processed Binary Organic Solar Cells with Efficiency of 19% and Module Efficiency Over 15% Enabled by Asymmetric Alkyl Chain Engineering

Advanced Energy Materials, Год журнала: 2023, Номер 13(39)

Опубликована: Сен. 3, 2023

Abstract The effective molecular design of non‐fullerene acceptors is important to high‐efficiency organic solar cells. Herein, asymmetric alkyl chain engineering applied a new acceptor named DTC11. Compared with the model accpetor DTY6 two long‐branched chains (2‐decyltetradecyl) on dithie‐nothiophen[3.2‐b]‐pyrrolobenzothiadiazole central unit, DTC11 owns 2‐decyltetradecyl and an undecyl in inner bay side unit. It found that such modification long chains, crystallinity, absorption coefficient, exciton lifetime are all improved. Moreover, comparison D18:DTY6 device, non‐halogen solvent processed D18:DTC11 device shows enhanced generation dissociation, improved charge transport as well weak recombination, promoting higher short‐circuit current density fill factor. Consequently, delivers outstanding efficiency 19.0%. More significantly, large‐area module (active area 21 cm 2 ) fabricated by blade coating, impressive 15.4% factor 74.6% realized. This study demonstrates feasible strategy high‐performance processability, which very essential for commercialization module.

Язык: Английский

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