Naphthalene Diimide-Based Terpolymers with Controlled Crystalline Properties for Producing High Electron Mobility and Optimal Blend Morphology in All-Polymer Solar Cells,Chemistry of Materials

当前位置： X-MOL 学术 › Chem. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Naphthalene Diimide-Based Terpolymers with Controlled Crystalline Properties for Producing High Electron Mobility and Optimal Blend Morphology in All-Polymer Solar Cells
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-03-13 , DOI: 10.1021/acs.chemmater.0c00055
Jin-Woo Lee ₁ , Min Jae Sung ₂ , Donguk Kim ₁ , Seungjin Lee ₁ , Hoseon You ₁ , Felix Sunjoo Kim ₃ , Yun-Hi Kim ₄ , Bumjoon J. Kim ₁ , Soon-Ki Kwon ₂

Affiliation

We report a series of new n-type random copolymers (P(NDI2OD-Se-Th x), where x = 0, 0.5, 0.7, 0.8, 0.9, 1.0) consisting of naphthalene diimide (NDI), selenophene-2,2′-thiophene (Se-Th), and seleno[3,2-b]thiophene (SeTh) to demonstrate their use in producing efficient all-polymer solar cells (all-PSCs) and organic field-effect transistors (OFETs). To investigate the effect of polymer crystallinity on the performance of all-PSCs and OFETs, we tuned the composition of the Se-Th and SeTh moieties in the P(NDI2OD-Se-Th x) polymers, resulting in enhanced crystalline properties with a higher Se-Th ratio. Thus, the OFET electron mobility was increased with a higher Se-Th ratio, exhibiting the highest value of 1.38 × 10^–1 cm² V^–1 s^–1 with P(NDI2OD-Se-Th 1.0). However, the performance of all-PSCs based on PBDB-T:P(NDI2OD-Se-Th x) showed a nonlinear trend relative to the Se-Th ratio and the performance was optimized with P(NDI2OD-Se-Th 0.8) exhibiting the highest power conversion efficiency of 8.30%. This is attributed to the stronger crystallization-driven phase separation in all-polymer blends for higher Se-Th ratio. At the optimal crystallinity of P(NDI2OD-Se-Th 0.8) in all-PSCs, the degree of phase separation, domain purity, and electron mobility were optimized, resulting in enhanced charge generation and transport. Our works describe the structure–property–performance relationships to design effective n-type polymers in terms of crystalline and electrical properties suitable for both efficient OFETs and all-PSCs.

中文翻译：

具有可控结晶特性的萘二酰亚胺基三元共聚物，可在全聚合物太阳能电池中产生高电子迁移率和最佳共混形态

我们报告了一系列新的n型无规共聚物（P（NDI2OD-Se-Th x），其中x = 0、0.5、0.7、0.8、0.9、1.0 ），由萘二酰亚胺（NDI），硒基-2,2组成'-噻吩（Se-Th）和硒代[3,2- b ]噻吩（SeTh）证明了它们在生产高效的全聚合物太阳能电池（all-PSC）和有机场效应晶体管（OFET）中的用途。为了研究聚合物结晶度对所有PSC和OFET性能的影响，我们调整了P（NDI2OD-Se-Th x）聚合物中Se-Th和SeTh部分的组成，从而提高了晶体性能，具有更高的Se-Th比。因此，随着Se-Th比的增加，OFET电子迁移率增加，呈现出最高的1.38×10 ^–1值。cm ² V ^–1 s ^–1，P（NDI2OD-Se-Th 1.0）。但是，基于PBDB-T：P（NDI2OD-Se-Th x的全PSC的性能）显示出相对于Se-Th比的非线性趋势，并且使用P（NDI2OD-Se-Th 0.8）优化了性能，呈现出8.30％的最高功率转换效率。这归因于对于更高的Se-Th比，所有聚合物共混物中更强的结晶驱动相分离。在全PSC中P（NDI2OD-Se-Th 0.8）的最佳结晶度下，相分离度，畴纯度和电子迁移率得到了优化，从而增强了电荷的产生和传输。我们的工作从适用于高效OFET和全PSC的晶体和电学性质来描述设计有效n型聚合物的结构-性能-性能关系。

更新日期：2020-03-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11