Recent progress in organic solar cells (Part I material science)

Science China Chemistry, Journal Year: 2021, Volume and Issue: 65(2), P. 224 - 268

Published: Dec. 27, 2021

Language: Английский

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

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(15)

Published: Jan. 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?

Language: Английский

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Polymerized Small‐Molecule Acceptors for High‐Performance All‐Polymer Solar Cells

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 60(9), P. 4422 - 4433

Published: Aug. 28, 2020

Abstract All‐polymer solar cells (all‐PSCs) have drawn tremendous research interest in recent years, due to their inherent advantages of good film formation, stable morphology, and mechanical flexibility. The most representative widely used n ‐CP acceptor was the naphthalene diimide based D‐A copolymer N2200 before 2017, power conversion efficiency (PCE) all‐PSCs on reached over 8% 2016. However, low absorption coefficient near‐infrared (NIR) region limits further increase its PCE. In we proposed a strategy polymerizing small‐molecule acceptors (SMAs) construct new‐generation polymer acceptors. polymerized SMAs (PSMAs) possess band gap strong NIR region, which attracted great attention drove PCE 15% recently. this Minireview explain design strategies molecular structure PSMAs describe progress. Finally, current challenges future prospects are analyzed discussed.

Language: Английский

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Achieving over 17% efficiency of ternary all-polymer solar cells with two well-compatible polymer acceptors

Joule, Journal Year: 2021, Volume and Issue: 5(6), P. 1548 - 1565

Published: April 23, 2021

Language: Английский

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Improving open-circuit voltage by a chlorinated polymer donor endows binary organic solar cells efficiencies over 17%

Science China Chemistry, Journal Year: 2020, Volume and Issue: 63(3), P. 325 - 330

Published: Feb. 17, 2020

Language: Английский

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High-Performance n-Type Polymer Semiconductors: Applications, Recent Development, and Challenges

Chem, Journal Year: 2020, Volume and Issue: 6(6), P. 1310 - 1326

Published: June 1, 2020

Language: Английский

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Controlling Molecular Mass of Low-Band-Gap Polymer Acceptors for High-Performance All-Polymer Solar Cells

Joule, Journal Year: 2020, Volume and Issue: 4(5), P. 1070 - 1086

Published: April 16, 2020

Language: Английский

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Polymer Acceptors Containing B←N Units for Organic Photovoltaics

Accounts of Chemical Research, Journal Year: 2020, Volume and Issue: 53(8), P. 1557 - 1567

Published: July 21, 2020

ConspectusOrganic photovoltaics (OPVs), in which blend films of organic or polymer electron donor and acceptor are used as the active layer, a promising photovoltaic technology with great advantages solution processing, low cost, flexibility. The development small molecular acceptors has boosted power conversion efficiency (PCE) OPVs from 10% to 18%. Among them, have merits superior morphology stability excellent mechanical properties. However, owing key requirement very low-lying LUMO/HOMO energy levels for acceptors, few conjugated polymers can work OPVs. majority based on strong electron-withdrawing imide units cyano substituents. Since 2015, containing boron-nitrogen coordination bond (B←N) emerged new kind performance various kinds devices. In this Account, we summarize our research progress B←N units.At first, introduce principle greatly down shift levels, enables be design acceptors. Then describe two strategies units. For high-efficiency OPVs, should wide absorption spectra, proper high mobility, good donor/acceptor morphology. We discuss how use finely tune mobility B←N-containing also improve phase separation blends these donors donors. These improvements lead three donor/polymer type solar cells show thermal PCE 8.0%, is highest value reported so far. all-polymer exhibit 10.1%. indoor 27.4% under fluorescent lamp illumination at 2000 lx. This fairly comparable those best inorganic photovoltaics. results provide solid foundation future advances. Finally, propose that attention paid further enhancement applications emerging acceptor.

Language: Английский

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Recent Advances in Single‐Junction Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(37)

Published: July 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.

Language: Английский

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Cyano-Functionalized Bithiophene Imide-Based n-Type Polymer Semiconductors: Synthesis, Structure–Property Correlations, and Thermoelectric Performance

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(3), P. 1539 - 1552

Published: Jan. 14, 2021

n-Type polymers with deep-positioned lowest unoccupied molecular orbital (LUMO) energy levels are essential for enabling n-type organic thin-film transistors (OTFTs) high stability and thermoelectrics (OTEs) doping efficiency promising thermoelectric performance. Bithiophene imide (BTI) its derivatives have been demonstrated as acceptor units constructing high-performance polymers. However, the electron-rich thiophene moiety in BTI leads to elevated LUMOs resultant hence limits their performance intrinsic stability. Herein, we addressed this issue by introducing strong electron-withdrawing cyano functionality on derivatives. We successfully overcome synthetic challenges developed a series of novel building blocks, CNI, CNTI, CNDTI, which show substantially higher electron deficiencies than does BTI. On basis these acceptor–acceptor type homopolymers copolymers were synthesized featured greatly suppressed (−3.64 −4.11 eV) versus that (−3.48 control polymer PBTI. Their resulted improved OTFTs more efficient n-doping OTEs corresponding highest electrical conductivity 23.3 S cm–1 power factor ∼10 μW m–1 K–2. The among values reported solution-processed molecularly n-doped new CNDTI offer remarkable platform polymers, study demonstrates cyano-functionalization is very effective strategy developing deep-lying electronic devices.

Language: Английский

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