首页|Near-infrared double-cable conjugated polymers based on alkyl linkers with tunable length for single-component organic solar cells

Near-infrared double-cable conjugated polymers based on alkyl linkers with tunable length for single-component organic solar cells

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The photovoltaic properties of double-cable conjugated polymers are significantly influenced by the length of the alkyl linkers that connect donor backbones and acceptor side units.In this study,a series of 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile(IC)-based double-cable polymers with alkyl linkers ranging from C8H16 to C16H32(Px,x=8,10,12,14,16)were synthesized for single-component organic solar cells(SCOSCs).Among these,the linker length x=12(P12)is found to optimize the power conver-sion efficiencies(PCEs)in SCOSCs.Specifically,PCEs increase from P8 to P12 and then decline from P12 to P16.Detailed investigations of optical absorption,charge transport,and morphology provide insights into the underlying factors contributing to these PCE variations.The findings indicate that the excep-tional photovoltaic properties observed in P12 can be attributed to three key factors:A delicate balance between enhanced charge separation facilitated by the increased spacer length and reduced crystallinity resulting from longer spacers,higher charge mobilities,and well-balanced hole/electron transport charac-teristics.This study highlights the critical role of linker length in determining the photovoltaic properties of double-cable conjugated polymer-based SCOSCs and offers valuable guidance for the design of novel double-cable conjugated polymers.

Single-component organic solar cellsDouble-cable conjugated polymersPhotovoltaic propertiesAlkyl linkers

Yikun Wang、Qiaomei Chen、Shijie Liang、Dongdong Xia、Chaowei Zhao、Christopher R.McNeill、Weiwei Li

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Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China

Institute of Applied Chemistry,Jiangxi Academy of Sciences,Nanchang 330096,China

Department of Materials Science and Engineering,Monash University,Wellington Road,Clayton,Victoria 3800,Australia

北京市自然科学基金北京市自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中央高校基本科研业务费专项中央高校基本科研业务费专项中央高校基本科研业务费专项Opening Foundation of State Key Laboratory of Organic-Inorganic Composites of Beijing University of Chemical Technology江西省科技厅项目江西省科技厅项目江西省科技厅项目

2212045JQ21006219051585207301692163128buctrc202111buctrc201828XK1802-2oic-20220100620202ACBL21300420212BCJ23035jxsq2019102004

2024

10.1016/j.cclet.2023.109164

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(4)
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