Semi-paracrystallinity in semi-conducting polymers

被引：36

作者：

Marina, Sara ^{[1
]}

Gutierrez-Fernandez, Edgar ^{[1
]}

Gutierrez, Junkal ^{[2
,3
]}

Gobbi, Marco ^{[4
,5
,6
]}

Ramos, Nicolas ^{[1
]}

Solano, Eduardo ^{[7
]}

Rech, Jeromy ^{[8
]}

You, Wei ^{[8
]}

Hueso, Luis ^{[4
,5
]}

Tercjak, Agnieszka ^{[2
]}

Ade, Harald ^{[9
,10
]}

Martin, Jaime ^{[1
,5
,11
]}

机构：

[1] Univ Basque Country UPV EHU, POLYMAT, Av Tolosa 72, Donostia San Sebastian 20018, Spain

[2] Univ Basque Country UPV EHU, Fac Engn Guipuzcoa, Grp Mat Technol, Plaza Europa 1, Donostia San Sebastian 20018, Spain

[3] Univ Basque Country UPV EHU, Fac Engn Vitoria Gasteiz, C Nieves Cana 12, Vitoria 01006, Spain

[4] CIC nanoGUNE BRTA, Donostia San Sebastian 20018, Basque Country, Spain

[5] Basque Fdn Sci, Ikerbasque, Bilbao 48013, Basque Country, Spain

[6] Ctr Fis Mat CFM MPC CSIC UPV EHU, Donostia San Sebastian 20018, Basque Country, Spain

[7] NCD SWEET Beamline, ALBA Synchrotron Light Source, Cerdanyola Del Valles 08290, Spain

[8] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

[9] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[10] North Carolina State Univ, Organ & Carbon Elect Labs ORaCEL, Raleigh, NC 27695 USA

[11] Univ A Coruna, Ctr Invest Tecnol CIT, Grp Polimeros, Esteiro 15471, Ferrol, Spain

来源：

MATERIALS HORIZONS | 2022年 / 9卷 / 04期

基金：

欧盟地平线“2020”; 美国国家科学基金会;

关键词：

CRYSTALLINITY; AGGREGATION; PERFORMANCE; TRANSPORT; DISORDER;

D O I：

10.1039/d1mh01349a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Precise determination of structural organization of semi-conducting polymers is of paramount importance for the further development of these materials in organic electronic technologies. Yet, prior characterization of some of the best-performing materials for transistor and photovoltaic applications, which are based on polymers with rigid backbones, often resulted in conundrums in which X-ray scattering and microscopy yielded seemingly contradicting results. Here we solve the paradox by introducing a new structural model, i.e., semi-paracrystalline organization. The model establishes that the microstructure of these materials relies on a dense array of small paracrystalline domains embedded in a more disordered matrix. Thus, the overall structural order relies on two parameters: the novel concept of degree of paracrystallinity (i.e., paracrystalline volume/mass fraction, introduced here for the first time) and the lattice distortion parameter of paracrystalline domains (g-parameter from X-ray scattering). Structural parameters of the model are correlated with long-range charge carrier transport, revealing that charge transport in semi-paracrystalline materials is particularly sensitive to the interconnection of paracrystalline domains.

引用

页码：1196 / 1206

页数：12

共 34 条

[1] Determination of the Crystallinity of Semicrystalline Poly(3-hexylthiophene) by Means of Wide-Angle X-ray Scattering [J].