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Over 13% Efficient Single-Component Organic Solar Cells Enabled by Adjusting the Conjugated-Length of Intermediate PBDB-T Block
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-11-03 , DOI: 10.1002/adfm.202208412 Xinrong Yang 1 , Yao Wu 2 , Yuan Gao 1 , Jing Guo 1 , Wei Wang 1 , Jie Min 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-11-03 , DOI: 10.1002/adfm.202208412 Xinrong Yang 1 , Yao Wu 2 , Yuan Gao 1 , Jing Guo 1 , Wei Wang 1 , Jie Min 1
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Batch-to-batch variation widely exists in conjugated donor-acceptor (D-A) block copolymer materials and plays a crucial role in photovoltaic performance of organic solar cells (OSCs). To investigate the influence of conjugated-length of the intermediate block on the performance of single-component OSC (SCOSCs), herein, four batches of conjugated block copolymers (CBCs, PB-b-PY-1, PB-b-PY-2, PB-b-PY-3, and PB-b-PY-4) are synthesized, which possess different D/A block lengths. As the conjugation length of intermediate D-block increases, the lamellar packing order of these CBCs shows a monotonically increasing trend, leading to stronger absorption spectra in the visible region, efficient charge transfer, and suppressed carrier recombination loss. Consequently, the PB-b-PY-4 device yields a higher efficiency of 13.28% than those of other CBCs. This study demonstrates the effectiveness of the conjugated length of intermediate D-blocks in designing high-performance conjugated D-A block copolymers, which paves the way toward developing high-performance SCOSCs.
中文翻译:
通过调整中间 PBDB-T 嵌段的共轭长度实现效率超过 13% 的单组分有机太阳能电池
批次间差异广泛存在于共轭供体-受体 (DA) 嵌段共聚物材料中,并且在有机太阳能电池 (OSC) 的光伏性能中起着至关重要的作用。为了研究中间嵌段的共轭长度对单组分 OSC (SCOSCs) 性能的影响,本文中,四批共轭嵌段共聚物 (CBCs、PB- b -PY-1、PB- b -PY-2 , PB- b -PY-3, 和 PB- b-PY-4) 被合成,具有不同的 D/A 块长度。随着中间 D-block 共轭长度的增加,这些 CBC 的层状堆积顺序呈单调增加趋势,导致可见光区吸收光谱更强,电荷转移有效,载流子复合损失受到抑制。因此, PB- b -PY-4 器件的效率比其他 CBC 的效率高 13.28%。该研究证明了中间 D 嵌段的共轭长度在设计高性能共轭 DA 嵌段共聚物中的有效性,这为开发高性能 SCOSC 铺平了道路。
更新日期:2022-11-03
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
通过调整中间 PBDB-T 嵌段的共轭长度实现效率超过 13% 的单组分有机太阳能电池
批次间差异广泛存在于共轭供体-受体 (DA) 嵌段共聚物材料中,并且在有机太阳能电池 (OSC) 的光伏性能中起着至关重要的作用。为了研究中间嵌段的共轭长度对单组分 OSC (SCOSCs) 性能的影响,本文中,四批共轭嵌段共聚物 (CBCs、PB- b -PY-1、PB- b -PY-2 , PB- b -PY-3, 和 PB- b-PY-4) 被合成,具有不同的 D/A 块长度。随着中间 D-block 共轭长度的增加,这些 CBC 的层状堆积顺序呈单调增加趋势,导致可见光区吸收光谱更强,电荷转移有效,载流子复合损失受到抑制。因此, PB- b -PY-4 器件的效率比其他 CBC 的效率高 13.28%。该研究证明了中间 D 嵌段的共轭长度在设计高性能共轭 DA 嵌段共聚物中的有效性,这为开发高性能 SCOSC 铺平了道路。