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Unraveling the Unconventional Order of a High-Mobility Indacenodithiophene–Benzothiadiazole Copolymer
ACS Macro Letters ( IF 5.1 ) Pub Date : 2021-10-05 , DOI: 10.1021/acsmacrolett.1c00547 Camila Cendra 1 , Luke Balhorn 1 , Weimin Zhang 2 , Kathryn O'Hara 3 , Karsten Bruening 4 , Christopher J Tassone 4 , Hans-Georg Steinrück 4, 5 , Mengning Liang 4 , Michael F Toney 4, 6 , Iain McCulloch 2, 7 , Michael L Chabinyc 3 , Alberto Salleo 1 , Christopher J Takacs 4
ACS Macro Letters ( IF 5.1 ) Pub Date : 2021-10-05 , DOI: 10.1021/acsmacrolett.1c00547 Camila Cendra 1 , Luke Balhorn 1 , Weimin Zhang 2 , Kathryn O'Hara 3 , Karsten Bruening 4 , Christopher J Tassone 4 , Hans-Georg Steinrück 4, 5 , Mengning Liang 4 , Michael F Toney 4, 6 , Iain McCulloch 2, 7 , Michael L Chabinyc 3 , Alberto Salleo 1 , Christopher J Takacs 4
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A new class of donor–acceptor (D–A) copolymers found to produce high charge carrier mobilities competitive with amorphous silicon (>1 cm2 V–1 s–1) exhibit the puzzling microstructure of substantial local order, however lacking long-range order and crystallinity previously deemed necessary for achieving high mobility. Here, we demonstrate the application of low-dose transmission electron microscopy to image and quantify the nanoscale and mesoscale organization of an archetypal D–A copolymer across areas comparable to electronic devices (≈9 μm2). The local structure is spatially resolved by mapping the backbone (001) spacing reflection, revealing nanocrystallites of aligned polymer chains throughout nearly the entire film. Analysis of the nanoscale structure of its ordered domains suggests significant short- and medium-range order and preferential grain boundary orientations. Moreover, we provide insights into the rich, interconnected mesoscale organization of this new family of D–A copolymers by analysis of the local orientational spatial autocorrelations.
中文翻译：
揭开高迁移率茚并二噻吩-苯并噻二唑共聚物的非常规顺序
一类新的施主-受主 (D-A) 共聚物被发现可产生与非晶硅竞争的高电荷载流子迁移率 (>1 cm 2 V –1 s –1 ) 表现出大量局部有序的令人费解的微观结构，但缺乏长程以前被认为是实现高迁移率所必需的有序和结晶度。在这里，我们展示了低剂量透射电子显微镜在与电子设备相当的区域（≈9 μm 2）。局部结构通过映射主链 (001) 间距反射进行空间解析，揭示了几乎整个薄膜中排列整齐的聚合物链的纳米微晶。对其有序域的纳米级结构的分析表明，显着的短程和中程有序和优先晶界取向。此外，我们通过分析局部取向空间自相关，提供了对这种新的 D-A 共聚物家族丰富、相互关联的中尺度组织的见解。
更新日期：2021-10-19
中文翻译：
揭开高迁移率茚并二噻吩-苯并噻二唑共聚物的非常规顺序
一类新的施主-受主 (D-A) 共聚物被发现可产生与非晶硅竞争的高电荷载流子迁移率 (>1 cm 2 V –1 s –1 ) 表现出大量局部有序的令人费解的微观结构，但缺乏长程以前被认为是实现高迁移率所必需的有序和结晶度。在这里，我们展示了低剂量透射电子显微镜在与电子设备相当的区域（≈9 μm 2）。局部结构通过映射主链 (001) 间距反射进行空间解析，揭示了几乎整个薄膜中排列整齐的聚合物链的纳米微晶。对其有序域的纳米级结构的分析表明，显着的短程和中程有序和优先晶界取向。此外，我们通过分析局部取向空间自相关，提供了对这种新的 D-A 共聚物家族丰富、相互关联的中尺度组织的见解。
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