Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology
文献类型：期刊论文
| 作者 | Kim, Joo-Hyun1,2; Gadisa, Abay1,2; Schaefer, Charley3; Yao, Huifeng4; Gautam, Bhoj R.1,2; Balar, Nrup2,5; Ghasemi, Masoud1,2; Constantinou, Iordania2,6; So, Franky2,6; O'Connor, Brendan T.2,5 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2017-07-07 |
| 卷号 | 5期号:25页码:13176-13188 |
| 英文摘要 | The performance of polymer-fullerene bulk heterojunction (BHJ) solar cells is highly affected by the morphology of the blend film. Though the structure of the BHJ morphology is well-understood, the relationship between relevant material interactions and BHJ morphological evolutions is poorly understood and seldom explored. In this report, we discuss the impact of polymer molecular weight (MW) on thermodynamic and kinetic phenomena which have a drastic influence on the nanoscale BHJ morphology. The blend film comprises a highly aggregating low bandgap diketopyrrolopyrrole-based polymer PDPP3T and the fullerene electron acceptor molecule PC71BM, cast from a 1,2-dichlorobenzene (DCB) solution with and without the additive 1,8-diiodooctane (DIO). The pair-wise interactions among the components were evaluated by Flory-Huggins interaction parameters (chi). The BHJ blend of PDPP3T and PC71BM exhibited liquid-liquid (L-L) phase separation as a result of strong polymer-fullerene interactions (large chi(PDPP3T-fullerene)) in DCB solution. In contrast, addition of 3% DIO into the DCB solution is found to stimulate polymer aggregation which gives rise to liquid-solid (L-S) phase separation. Large chi(PDPP3T-fullerene) and chi(PDPP3T-solvent) were observed as a result of increasing polymer MW, and these changes promote strong L-L phase separation and polymer aggregation in the blend solution, respectively. The latter interactions have led to low molecular mobility, with an end result of reduced crystallinity and smaller domain size of the BHJ films. The observed dramatic MW-dependent morphological changes were also manifested in solar cell outputs as well as charge carrier dynamics calculated by transient absorption measurements. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38948]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA 2.North Carolina State Univ, ORaCEL, Raleigh, NC 27695 USA 3.Simbeyond BV, Groene Loper 19, NL-5612 AE Eindhoven, Netherlands 4.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 5.North Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA 6.North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA |
| 推荐引用方式 GB/T 7714 | Kim, Joo-Hyun,Gadisa, Abay,Schaefer, Charley,et al. Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(25):13176-13188. |
| APA | Kim, Joo-Hyun.,Gadisa, Abay.,Schaefer, Charley.,Yao, Huifeng.,Gautam, Bhoj R..,...&Ade, Harald.(2017).Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology.JOURNAL OF MATERIALS CHEMISTRY A,5(25),13176-13188. |
| MLA | Kim, Joo-Hyun,et al."Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology".JOURNAL OF MATERIALS CHEMISTRY A 5.25(2017):13176-13188. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。