Themed collection Editor’s Choice: Organic Photovoltaics
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Editors’ choice collection on organic photovoltaics: back in the game
Associate Editors Yana Vaynzof and Renaud Demadrille highlight recent research in organic photovoltaics in this themed collection (rsc.li/OrganicPhotovoltaics).
Mater. Adv., 2021,2, 1111-1112
https://doi.org/10.1039/D1MA90006D
Editors’ choice collection on organic photovoltaics: back in the game
Associate Editors Yana Vaynzof and Renaud Demadrille highlight recent research in organic photovoltaics in this themed collection (rsc.li/OrganicPhotovoltaics).
J. Mater. Chem. C, 2021,9, 1124-1125
https://doi.org/10.1039/D0TC90266G
Recent advances of polymer acceptors for high-performance organic solar cells
Recent advances in polymer acceptors that focus on structure–property relationships, which may provide guidance for photovoltaic materials, were systematically summarized.
J. Mater. Chem. C, 2020,8, 28-43
https://doi.org/10.1039/C9TC05567C
Design of organic small molecules for photovoltaic application with high open-circuit voltage (Voc)
An efficient approach to improve Voc values for OSCs through molecular design and modification of photovoltaic materials was summarized and discussed.
J. Mater. Chem. C, 2019,7, 2487-2521
https://doi.org/10.1039/C8TC06589F
Non-fullerene organic solar cells based on a BODIPY-polymer as electron donor with high photocurrent
Non-fullerene organic solar cells based on a BODIPY-polymer as electron donor provided a high photocurrent above 21 mA cm−2 and a record efficiency of 9.86%.
J. Mater. Chem. C, 2020,8, 2232-2237
https://doi.org/10.1039/C9TC05480D
Improving the performance of near infrared binary polymer solar cells by adding a second non-fullerene intermediate band-gap acceptor
A series of ternary OSCs were fabricated with PBDB-T-2Cl:IXIC-4Cl as a host system and IT-4F as the third component. The optimal ternary device achieved an excellent PCE of 15.0%.
J. Mater. Chem. C, 2020,8, 909-915
https://doi.org/10.1039/C9TC06362E
Naphthalene core-based noncovalently fused-ring electron acceptors: effects of linkage positions on photovoltaic performances
The structural variation by just changing the linkage positions affects the molecular configuration, absorption, packing, charge transport and photovoltaic performance.
J. Mater. Chem. C, 2019,7, 15141-15147
https://doi.org/10.1039/C9TC05013B
A tetrachlorinated molecular non-fullerene acceptor for high performance near-IR absorbing organic solar cells
Installation of chlorine atoms into the ITIC non-fullerene acceptor enables low energy photon harvesting generating high photocurrent in OSCs when paired with PBDB-T. The active layer morphology is greatly influenced by solvent additives.
J. Mater. Chem. C, 2018,6, 9060-9064
https://doi.org/10.1039/C8TC02701C
A nonfullerene acceptor utilizing a novel asymmetric multifused-ring core unit for highly efficient organic solar cells
In this communication, a novel asymmetric ladder-type thiophene-phenylene-thieno[3,2-b]thiophene-fused building block TPTT and the corresponding asymmetric nonfullerene acceptor TPTT-IC were reported for the first time.
J. Mater. Chem. C, 2018,6, 4873-4877
https://doi.org/10.1039/C8TC01229F
Efficient all-polymer solar cells based on a narrow-bandgap polymer acceptor
A new narrow-bandgap polymerized small molecule acceptor, namely PG1, was designed and synthesized. The optimal all-polymer solar cells (all-PSCs) based PBDB-T:PG1 achieved an outstanding PCE of 11.5% with a high Voc of 0.94 V.
J. Mater. Chem. C, 2020,8, 16180-16187
https://doi.org/10.1039/D0TC03303K
Effects of polymer crystallinity on non-fullerene acceptor based organic solar cell photostability
Organic solar cell shows significantly different degradation rate with different donor polymer crystallinity, even the donors and acceptors are all photostable.
J. Mater. Chem. C, 2020,8, 16092-16099
https://doi.org/10.1039/D0TC03969A
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Structure dependent photostability of ITIC and ITIC-4F
ITIC photostability is markedly dependent on the specific polymorph phase and end-group decoration. Fluorination grants stronger chemical stability upon degradation.
Mater. Adv., 2020,1, 2846-2861
https://doi.org/10.1039/D0MA00458H
Design of narrow bandgap non-fullerene acceptors for photovoltaic applications and investigation of non-geminate recombination dynamics
A new narrow bandgap non-fullerene electron acceptor was designed, synthesized, and characterized for near-infrared organic photovoltaics.
J. Mater. Chem. C, 2020,8, 15175-15182
https://doi.org/10.1039/D0TC02136A
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Diketopyrrolopyrrole linked porphyrin dimers for visible-near-infrared photoresponsive nonfullerene organic solar cells
The binding of a porphyrin dimer donor (ETDPP-2P) and a non-fullerene acceptor IT-M leads to a visible-near-infrared photoresponse in all small molecule organic solar cells with a power conversion efficiency of 5.69%.
Mater. Adv., 2020,1, 2520-2525
https://doi.org/10.1039/D0MA00487A
High open-circuit voltage roll-to-roll compatible processed organic photovoltaics
Materials design strategies for high open circuit voltage organic photovoltaics.
J. Mater. Chem. C, 2020,8, 13430-13438
https://doi.org/10.1039/D0TC03614E
Quantifying Voc loss induced by alkyl pendants of acceptors in organic solar cells
In the organic photovoltaic community, extensive efforts have been made in proposing resolutions for depressing Voc loss related to the molecular structures and optoelectronic properties of materials in bulk heterojunctions.
J. Mater. Chem. C, 2020,8, 12568-12577
https://doi.org/10.1039/D0TC01941K
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Comparison of fluorene, silafluorene and carbazole as linkers in perylene monoimide based non-fullerene acceptors
Perylene monoimide based non-fullerene acceptors with fluorene, silafluorene and carbazole as linkers were synthesized and compared regarding their structural, optical, electronic and photovoltaic properties.
Mater. Adv., 2020,1, 2095-2106
https://doi.org/10.1039/D0MA00470G
Enhanced efficiency and stability of nonfullerene ternary polymer solar cells based on a spontaneously assembled active layer: the role of a high mobility small molecular electron acceptor
Introducing a medium bandgap electron acceptor into the PTB7-Th:COi8DFIC solar cell increases both thermal stability and PCE without external treatments.
J. Mater. Chem. C, 2020,8, 6196-6202
https://doi.org/10.1039/D0TC00225A
Isomerizing thieno[3,4-b]thiophene-based near-infrared non-fullerene acceptors towards efficient organic solar cells
The photovoltaic properties of near-infrared non-fullerene acceptors are improved by isomerizing the linkage positions of thieno[3,4-b]thiophene.
J. Mater. Chem. C, 2020,8, 4357-4364
https://doi.org/10.1039/D0TC00269K
Side chain engineering of polymer acceptors for all-polymer solar cells with enhanced efficiency
Side chain engineering of fused bithiophene imide oligomers yields a new series of random copolymers with tunable polymer chain packing and film morphology. When applied in all-polymer solar cells, an 8.32% efficiency is obtained.
J. Mater. Chem. C, 2020,8, 4012-4020
https://doi.org/10.1039/D0TC00087F
Optimization of processing solvent and film morphology to achieve efficient non-fullerene polymer solar cells processed in air
Efficient non-fullerene polymer solar cells based on P2F-EHp and ITIC derivatives were achieved by blade-coating under the ambient air conditions.
J. Mater. Chem. C, 2020,8, 270-275
https://doi.org/10.1039/C9TC05358A
Halogenation on benzo[1,2-b:4,5-b′]difuran polymers for solvent additive-free non-fullerene polymer solar cells with efficiency exceeding 11%
In this work, two novel two-dimensional (2D) benzo[1,2-b:4,5-b′]difuran (BDF)-based wide bandgap polymers were designed using a halogenation strategy by incorporating fluorine- and chlorine-substituted conjugated side chains, respectively.
J. Mater. Chem. C, 2020,8, 139-146
https://doi.org/10.1039/C9TC06018A
An A–D–D–A-type non-fullerene small-molecule acceptor with strong near-infrared absorption for high performance polymer solar cells
An A–D–D–A-type near-infrared non-fullerene small-molecule acceptor IDT2-DFIC with indacenodithiophene–indacenodithiophene (IDT2) as donating core and 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (2FIC) as electron withdrawing end groups has been synthesized.
J. Mater. Chem. C, 2019,7, 13301-13306
https://doi.org/10.1039/C9TC04898G
Enhancing phase separation with a conformation-locked nonfullerene acceptor for over 14.4% efficiency solar cells
The molecular backbone design and sidechain control are both considered for fused-ring electron acceptors to fine-tune the morphology and miscibility of the active layers for organic solar cells.
J. Mater. Chem. C, 2019,7, 13279-13286
https://doi.org/10.1039/C9TC04798K
Molecular origin of efficient hole transfer from non-fullerene acceptors: insights from first-principles calculations
Our results suggest the conditions to promote an efficient hole transfer from acceptors induced by molecular orbital delocalization.
J. Mater. Chem. C, 2019,7, 12180-12193
https://doi.org/10.1039/C9TC03563J
High-efficiency ternary nonfullerene organic solar cells fabricated with a near infrared acceptor enhancing exciton utilization and extending absorption
Incorporating an infrared nonfullerene acceptor O6T-4F enhances the exciton utilization and extends the absorption, leading to an increased PCE of organic solar cells.
J. Mater. Chem. C, 2019,7, 10498-10506
https://doi.org/10.1039/C9TC03534F
Small energy loss in ternary organic solar cells with a blend of cascade energy levels: two fullerene-free acceptors as the electron acceptor
Fullerene-free organic solar cells (OSCs) were fabricated using a blend of wide bandgap donor PBDB-T and ultranarrow bandgap acceptor IEICO-4F as binary photoactive layers.
J. Mater. Chem. C, 2019,7, 10039-10048
https://doi.org/10.1039/C9TC03210J
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Improved photostability in ternary blend organic solar cells: the role of [70]PCBM
Identifying the best ratios of components in ternary blend polymer solar cell could lead to more photostable organic solar cells.
J. Mater. Chem. C, 2019,7, 5104-5111
https://doi.org/10.1039/C8TC06621C
Diketopyrrolopyrrole-based terpolymers with tunable broad band absorption for fullerene and fullerene-free polymer solar cells
Fullerene and fullerene-free organic photovoltaics.
J. Mater. Chem. C, 2019,7, 3375-3384
https://doi.org/10.1039/C8TC06407E
High-efficiency non-fullerene polymer solar cell fabricated by a simple process using new conjugated terpolymers
A series of conjugated terpolymers bearing weak and strong accepting units were synthesized. Their optical and electrochemical properties and device performance can be easily tuned by controlling molar ratio of two accepting units.
J. Mater. Chem. C, 2019,7, 111-118
https://doi.org/10.1039/C8TC05035J
On the understanding of energetic disorder, charge recombination and voltage losses in all-polymer solar cells
Based on comparisons of two all-polymer solar cells based on PTzBI:N2200 and PNDN-T:N2200 blends, factors limiting the device characteristics are investigated.
J. Mater. Chem. C, 2018,6, 7855-7863
https://doi.org/10.1039/C8TC02689K
Effect of a methyl thiophene-3-carboxylate bridge in an indacenodithiophene-based acceptor–donor–acceptor-type molecule on the performance of non-fullerene polymer solar cells
Fullerene-free polymer solar cells with the as-cast blend film of IDT-3MT and PBDB-T exhibited a high PCE of 8.40%.
J. Mater. Chem. C, 2018,6, 7549-7556
https://doi.org/10.1039/C8TC01508B
Efficient device engineering for inverted non-fullerene organic solar cells with low energy loss
We have systematically investigated the synergistic effect of thermal annealing and interlayer modification on improving the performance of inverted non-fullerene organic solar cells.
J. Mater. Chem. C, 2018,6, 4457-4463
https://doi.org/10.1039/C8TC00705E
About this collection
Associate Editors for Journal of Materials Chemistry C and Materials Advances, Renaud Demadrille (Interdisciplinary Research Institute of Grenoble, France) and Yana Vaynzof (Technical University of Dresden, Germany), have selected a few outstanding recent manuscripts on organic photovoltaics for this Editor’s Choice Collection. In order to highlight developments in organic photovoltaics, this online collection includes recent manuscripts from Journal of Materials Chemistry C and Materials Advances on the topic.