Role of Polymer Segregation on the Mechanical Behavior of All Polymer Solar Cell Active Layers
文献类型：期刊论文
| 作者 | Balar, Nrup1; Xiong, Yuan2; Ye, Long2; Li, Sunsun3; Nevola, Daniel2; Dougherty, Daniel B.2; Hou, Jianhui3; Ade, Harald2; O'Connor, Brendan T.1 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2017-12-20 |
| 卷号 | 9期号:50页码:43886-43892 |
| ISSN号 | 1944-8244 |
| 关键词 | All-polymer Solar Cell Polymer Blend Film Fracture Energy Crack Onset Strain Multilength Scale Morphology |
| DOI | 10.1021/acsami.7b13719 |
| 英文摘要 | An all-polymer bulk heterojunction (BHJ) active layer that removes the use of commonly used small molecule electron acceptors is a promising approach to improve the thermomechanical behavior of organic solar cells. However, there has been limited research on their mechanical properties. Here, we report on the mechanical behavior of high-performance blade-coated all-polymer BHJ films cast using eco-friendly solvents. The mechanical properties considered include the elastic modulus, crack onset strain, and cohesive fracture energy. We show that the mechanical behavior of the blend is largely unaffected by significant changes in the segregation characteristics of the polymers, which was varied systematically through solvent formulation. In comparison to a polymer:fullerene BHJ counterpart, the all polymer films were found to have lower stiffness and increased ductility. Yet, the fracture energy of the all-polymer films is not significantly improved compared to that of the polymer:fullerene films. This study highlights that improved mechanical behavior of all-polymer systems cannot be assumed, and that details of the molecular structure, molecular weight, and film morphology play an important role in both the optoelectronic and mechanical properties. Furthermore, we show that simple composite modeling provides a predictive tool for the mechanical properties of the polymer blend films, providing a framework to guide future optimization of the mechanical behavior. |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000418783700056 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/45439]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | O'Connor, Brendan T. |
| 作者单位 | 1.North Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA 2.North Carolina State Univ, Dept Phys, Organ & Carbon Elect Lab ORaCEL, Raleigh, NC 27695 USA 3.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Balar, Nrup,Xiong, Yuan,Ye, Long,et al. Role of Polymer Segregation on the Mechanical Behavior of All Polymer Solar Cell Active Layers[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(50):43886-43892. |
| APA | Balar, Nrup.,Xiong, Yuan.,Ye, Long.,Li, Sunsun.,Nevola, Daniel.,...&O'Connor, Brendan T..(2017).Role of Polymer Segregation on the Mechanical Behavior of All Polymer Solar Cell Active Layers.ACS APPLIED MATERIALS & INTERFACES,9(50),43886-43892. |
| MLA | Balar, Nrup,et al."Role of Polymer Segregation on the Mechanical Behavior of All Polymer Solar Cell Active Layers".ACS APPLIED MATERIALS & INTERFACES 9.50(2017):43886-43892. |
入库方式： OAI收割
来源：化学研究所
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