Manipulating the nanoscale morphology in the active layers of polymer solar cells

Qin, Yunpeng; Ye, Long; Fan, Huili; Hou, Jianhui

doi:10.1360/n032015-00162

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…In the OSCs field, using solvent additives is a more convenient strategy to improve the PCE of bulk heterojunction (BHJ) solar cells. − Generally, solvent additives can not only achieve effective exciton dissociation but also improve the charge transport by adjusting molecular aggregation. Wang et al reported that the addition of DIO as an additive can reduce molecular aggregation and the domain size in PBDTTT-C:PC71BM, finally promoting the exciton dissociation and improving charge transport .…”

Section: Introductionmentioning

confidence: 99%

Improved Morphology and Interfacial Contact of PBDB-T:N2200-Based All-Polymer Solar Cells by Using the Solvent Additive p-Anisaldehyde

Huang

Huai

Ren

et al. 2019

ACS Appl. Energy Mater.

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All-polymer solar cells (all-PSCs) have been intensively investigated due to their excellent thermal and mechanical stabilities. However, the efficiency of all-PSCs is still far behind that of organic solar cells (OSCs), which are based on small molecule acceptors. Improving the efficiency of all-PSCs is of great urgency. In this work, the solvent additive named p-anisaldehyde (AA) was introduced to improve the performance of all-PSCs based on PBDB-T:N2200. It is demonstrated that AA helps to form a better network interpenetrating track and more uniform phase separation. With the assistance of AA, which has both an oleophilic methoxy group and a hydrophilic aldehyde group, the interfacial contact between the donor and the acceptor (D/A) is improved, increasing the contact area at D/A and promoting efficient exciton dissociation. More importantly, AA acts as a “bridge” between the oleophilic active layer and the hydrophilic PEDOT:PSS layer, improving the interfacial compatibility between the active layer and the PEDOT:PSS layer, reducing the interfacial resistance, and facilitating the carrier transport. Finally, the all-PSCs based on PBDB-T:N2200 exhibits a superior power conversion efficiency (PCE) of 7.24% which is a record efficiency for the current all-PSCs with the same architecture. In this work, a promising and effective strategy for achieving high efficiency all-PSCs is provided.

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Section: Introductionmentioning

confidence: 99%

Improved Morphology and Interfacial Contact of PBDB-T:N2200-Based All-Polymer Solar Cells by Using the Solvent Additive p-Anisaldehyde

Huang

Huai

Ren

et al. 2019

ACS Appl. Energy Mater.

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A-D-A small molecule donors based on pyrene and diketopyrrolopyrrole for organic solar cells

Liu

et al. 2017

Sci. China Chem.

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Effect of molecular weight on microstructure and electrical properties of conjugated polymer films

Li¹,

Han²,

Ye³

2021

Sci. Sin.-Chim

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Conjugated polymers are soft materials composed of carbon, hydrogen, nitrogen, sulfur and other elements, which have great application prospects in the printed electronics industry represented by flexible disp lays, logic circuits and photovoltaic panels. The change of molecular weight can directly affect the solid microstructure of conjugated polymers and then affect their photoelectric properties. In this review, the influence of molecular weight on the aggregation structure and charge transport properties of amorphous, paracrystalline and semi-crystalline conjugated polymers were described successively. Then, the relationship between molecular weight, microstructure, and performance (solar cells and thin-film transistors) is summarized. Finally, the urgent scientific problems to be solved at present and the future directions are outlined. We hope that this review on the molecular weight effects of conjugated polymers, which is an important structural parameter, to help readers to deepen their understanding of the influence mechanism of molecular weight and to further provide guidance for the regulation of the structure and properties of organic photoelectric films.

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Manipulating the nanoscale morphology in the active layers of polymer solar cells

Cited by 3 publications

References 44 publications

Improved Morphology and Interfacial Contact of PBDB-T:N2200-Based All-Polymer Solar Cells by Using the Solvent Additive p-Anisaldehyde

Improved Morphology and Interfacial Contact of PBDB-T:N2200-Based All-Polymer Solar Cells by Using the Solvent Additive p-Anisaldehyde

A-D-A small molecule donors based on pyrene and diketopyrrolopyrrole for organic solar cells

Effect of molecular weight on microstructure and electrical properties of conjugated polymer films

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