The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects

Liang, Xin; Wang, Jiuxing; Miao, Run; Zhao, Qing; Huang, Linjun; Wen, Shuguang; Tang, Jianguo

doi:10.1016/j.dyepig.2021.109963

Cited by 18 publications

(18 citation statements)

References 206 publications

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“…As reported widely, intramolecular weak non-covalent interactions could improve molecular planarity through partly "locking" the s-bonds, which has been veried by theoretical calculations and single crystal X-ray diffraction. [17][18][19][20][21] In practice, however, there is inadequate time for molecules to rearrange during the fast lm preparation step of the solution procedure. This may result in fairly different nal molecular conformations from those of theoretical simulations or slow solvent volatilization/exchange in single crystal cultivation.…”

Section: Introductionmentioning

confidence: 99%

Rationally regulating the π-bridge of small molecule acceptors for efficient organic solar cells

Wang

Han

et al. 2022

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Rationally regulating the π-bridge of small molecule acceptors for efficient organic solar cells

Wang

Han

et al. 2022

J. Mater. Chem. A

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“…To date, a wide variety of NFA materials, including perylene diimide (PDI), naphthalene diimide (NDI), diketopyrrolopyrrole (DPP), indacenodithiophene (IDT) and benzothiadiazole (Y6) based small molecular acceptors (SMAs), that exhibit improved power conversion efficiency (PCE) over the fullerene materials have been developed [9]. A champion device efficiency narrowing 18% PCE has been achieved in a single junction device using a Y6 derivative [10].…”

Section: Introductionmentioning

confidence: 99%

“…A champion device efficiency narrowing 18% PCE has been achieved in a single junction device using a Y6 derivative [10]. Among the multitude of investigated NFA materials, the acceptor-donor-acceptor (A-D-A) type based on an IDT core has gradually emerged as an efficient material, contributing to a remarkable enhancement of the efficiency of BHJs up to 13% [11] (a broad list of small molecular acceptors along with their photovoltaic properties appears in a very recent review [9]).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Terminal Acceptor Unit on the Performance of Non-Fullerene Indacenodithiophene Acceptors in Organic Solar Cells

et al. 2022

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Four acceptor–donor–acceptor (A–D–A)-type molecules bearing indacenodithiophene as donating central core and various end-capping acceptor units have been designed and synthesised as n-type materials suitable for organic solar cells (OSCs). The studied optical and electrochemical properties supported by theoretical calculations revealed that the nature and the strength of the terminal groups exert a decisive influence on the polymer bulk-heterojunction OSC performance.

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“…[ 15–20 ] The efficient PSCs employ the bulk heterojunction (BHJ) thin film which is made of polymer or small molecule as a donor (p‐type semiconductor) and a fullerene derivative [ 21 , 22 ] or a NFSM as an acceptor (n‐type semiconductor). [ 23–30 ]…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17][18][19][20] The efficient PSCs employ the bulk heterojunction (BHJ) thin film which is made of polymer or small molecule as a donor (p-type semiconductor) and a fullerene derivative [21,22] or a NFSM as an acceptor (n-type semiconductor). [23][24][25][26][27][28][29][30] In most cases, the efficient BHJ-PSCs use the narrow bandgap NFSMAs, Scheme 1. Synthetic plan of P128 and P129.…”

Section: Introductionmentioning

confidence: 99%

New Wide Bandgap Conjugated D‐A Copolymers Based on BDT or NDT Donor Unit and Anthra[1,2‐b:4,3,bʹ:6,7‐cʺ]trithiophene‐8‐12‐dione Acceptor for Fullerene‐Free Polymer Solar Cells

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Константинов

Хохлов

et al. 2022

Macro Chemistry & Physics

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Two donor-acceptor (D-A) copolymers, P128 and P129, containing benzodithiophene (BDT) and naphthiodithiophene (NDT) donor unit, respectively, and the alike anthra[1,2-b:4,3,bʹ:6,7-cʺ] trithiophene-8-12-dione(A3T) as an acceptor unit, are synthesized. The P129 (NDT donor) exhibits enhanced chain planarity and linearity of backbone compared to P128 (BDT donor), which leads to a considerable increase in both the light-harvesting ability and hole mobility. In addition to it, the incorporation of the NDT unit creates a strong modification in the morphology with a well-mixed interpenetrating nanofibrillar network with an increased donor-acceptor interface in the P129:Y6 bulk heterojunction active layer that leads to a high short-circuit current density and fill factor. The power conversion efficiency (PCE) of the improved polymer solar cells based on P128:Y6 and P129:Y6 is 6.25% and 14.55%, respectively. The negative HOMO offset (−0.02 eV) at P128/Y6 interface restricts the hole transfer from Y6 to P128 and results in low value of short-circuit current and thereby poor PCE. Finally, the ternary PSCs are constructed with a weight ratio of 0.5:0.5 between P128 and P129 and the weight component of Y6 is kept constant and the PSC attains a PCE of 16.19%. This increase in the PCE can be attributed to the formation of semiconducting alloy based on P128 and P129 donors and the transformation of HOMO offset from negative (−0.02 eV for Y6/P128) to positive (0.04 eV for Y6/P128:P129).

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The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects

Cited by 18 publications

References 206 publications

Rationally regulating the π-bridge of small molecule acceptors for efficient organic solar cells

Rationally regulating the π-bridge of small molecule acceptors for efficient organic solar cells

Effect of the Terminal Acceptor Unit on the Performance of Non-Fullerene Indacenodithiophene Acceptors in Organic Solar Cells

New Wide Bandgap Conjugated D‐A Copolymers Based on BDT or NDT Donor Unit and Anthra[1,2‐b:4,3,bʹ:6,7‐cʺ]trithiophene‐8‐12‐dione Acceptor for Fullerene‐Free Polymer Solar Cells

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