Diketopyrrolopyrrole-Based Conjugated Polymers with Perylene Bisimide Side Chains for Single-Component Organic Solar Cells

Lai, Wenbin; Li, Cheng; Zhang, Jianqi; Yang, Fan; Colberts, Fallon J. M.; Guo, Bing; Wang, Qiang Mike; Li, Mengmeng; Zhang, Andong; Janssen, Raj René; Zhang, Maojie; Li, Weiwei

doi:10.1021/acs.chemmater.7b02534

Cited by 97 publications

(88 citation statements)

References 39 publications

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“…Copolymer 6b showed an ≈2 orders of magnitude higher hole mobility than 6a. [80,81] Three polymers with alkyl spacers of 6 and 12 carbons and DTBDT substituted by branched alkyl and alkylsulfanyl groups were synthesized. The best device gave a J sc of 1.50 mA cm −2 , a V oc of 0.44 V, and a PCE of 0.20%.…”

Section: "Double-cable" Polymers With Nonfullerene Acceptor Unitsmentioning

confidence: 99%

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The Dawn of Single Material Organic Solar Cells

2018

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Single material organic solar cells (SMOSCs) are based on ambivalent materials containing electron donor (D) and acceptor (A) units capable to ensure the basic functions of light absorption, exciton dissociation, and charge transport. Compared to bicomponent bulk heterojunctions, SMOSCs present several major advantages such as considerable simplification of cell fabrication and a strong stabilization of the morphology of the D/A interface, and thus of the cell lifetime. In addition to these technical issues, SMOSCs pose fundamental questions regarding the possible formation, and dissociation of excitons on the same molecular D–A architecture. SMOSCs are developed with various approaches, namely “double‐cable” polymers, block copolymers, oligomers, and molecules that differ by the donor platform: polymer or molecule, the nature of A, the D–A connection, and the intra‐ and intermolecular interactions of D and A. Although for several years the maximum efficiency of SMOSCs has remained limited to 1.0–1.5%, impressive progress has been recently accomplished leading to SMOSCs with 4.0–5.0% efficiency. Here, recent advances in the synthesis of D–A materials for SMOSCs are presented in the broader context of the chemistry of organic photovoltaic materials in order to discuss possible directions for future research.

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Section: "Double-cable" Polymers With Nonfullerene Acceptor Unitsmentioning

confidence: 99%

“…The best device gave a J sc of 1.50 mA cm −2 , a V oc of 0.44 V, and a PCE of 0.20%. [80] The authors have compared polymer 9c with a parent systems containing only one PBI unit on the DPP block. Thermal treatment at 150 °C for 20 min increased J sc to 2.57 mA cm −2 and PCE to 0.49%.…”

Section: "Double-cable" Polymers With Nonfullerene Acceptor Unitsmentioning

confidence: 99%

The Dawn of Single Material Organic Solar Cells

2018

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“…The first challenge is to develop new conjugated monomers for aryl‐aryl polymerization, instead of using P3HT derivatives. In our first work, we developed these double‐cable monomers M5 and M9 containing dibromo‐dithienyl‐DPP backbone and PBI as side units . As shown in Scheme , we firstly synthesized the tetrabromo‐DPP compounds M3 and M8 , in which PBI could be attached as side chains due to the different reactivity of these bromides.…”

Section: Double‐cable Conjugated Polymers For Single‐component Organimentioning

confidence: 99%

Crystalline Conjugated Polymers for Organic Solar Cells: From Donor, Acceptor to Single‐Component

Xia

2018

The Chemical Record

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Organic solar cells have made rapid progress in the last two decades due to the innovation of conjugated materials and photovoltaic devices. Microphase separation that connects with materials and devices plays a crucial role in the charge generation process. In this account, we summary our recent works of developing new crystalline conjugated polymers to control the microphase separation in thin films in order to realize high performance in solar cells, including crystalline diketopyrrolopyrrole‐based donor polymers, perylene bisimide‐based electron acceptors, and “double‐cable” conjugated polymers that contain covalently‐linked crystalline donor and acceptor in one material for single‐component organic solar cells.

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“…All‐conjugated block copolymers (BCPs) which consist of covalently bound donor and acceptor polymers provide a potential alternative for studying charge separation and recombination processes at the donor–acceptor interface. These materials have been implemented in single‐component photovoltaic devices, as detailed in recent publications In our previous work, we also showed that the composition of the linking group between donor and acceptor domains can play a critical role in charge separation . However, a systematic study of the role of the linking group in all‐conjugated BCPs with a flexible, insulating linker has not been carried out, and only a few prior studies have reported all‐conjugated BCPs with flexible linkers …”

Section: Introductionmentioning

confidence: 99%

An experimental and computational study of donor–linker–acceptor block copolymers for organic photovoltaics

Jakowski

Zheng

et al. 2018

J Polym Sci B Polym Phys

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Block copolymers with donor and acceptor conjugated polymer blocks provide an approach to dictating the donor–accepter interfacial structure and understanding its relationship to charge separation and photovoltaic performance. We report the preparation of a series of donor‐linker‐acceptor block copolymers with poly(3‐hexylthiophene) (P3HT) donor blocks, poly((9,9‐dioctylfluorene)‐2,7‐diyl‐alt‐[4,7‐bis(thiophen‐5‐yl)‐2,1,3‐benzothiadiazole]‐2′,2″‐diyl) (PFTBT) acceptor blocks, and varying lengths of oligo‐ethylene glycol (OEG) chains as the linkers. Morphological analysis shows that the linkers increase polymer crystallinity while a combination of optical and photovoltaic measurements shows that the insertion of a flexible spacer reduces fluorescence quenching and photovoltaic efficiencies of solution processed photovoltaic devices. Density functional theory (DFT) simulations indicate that the linking groups reduce both charge separation and recombination rates, and block copolymers with flexible linkers will likely rotate to assume a nonplanar orientation, resulting in a significant loss of overlap at the donor–linker–acceptor interface. This work provides a systematic study of the role of linker length on the photovoltaic performance of donor–linker–acceptor block copolymers and indicates that linkers should be designed to control both the electronic properties and relative orientations of conjugated polymers at the interface. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 1135–1143

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Diketopyrrolopyrrole-Based Conjugated Polymers with Perylene Bisimide Side Chains for Single-Component Organic Solar Cells

Cited by 97 publications

References 39 publications

The Dawn of Single Material Organic Solar Cells

The Dawn of Single Material Organic Solar Cells

Crystalline Conjugated Polymers for Organic Solar Cells: From Donor, Acceptor to Single‐Component

An experimental and computational study of donor–linker–acceptor block copolymers for organic photovoltaics

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