DataVXACS Energy LettersPaper
journal article·2018-07-13

Asymmetrical Small Molecule Acceptor Enabling Nonfullerene Polymer Solar Cell with Fill Factor Approaching 79%

Wei Gao, Tao Liu, Cheng Zhong, Guangye Zhang, Yunpeng Zhang, Ruijie Ming, Lin Zhang, Jingming Xin, Kailong Wu, Yunlong Guo, Wei Ma, He Yan, Yunqi Liu, Chuluo Yang

ACS Energy Letters· Volume 3· Issue 7
Publisher page
Source abstract

Abstract

Relative to the increase of open-circuit voltage and short-circuit current, promoting fill factor (FF) of the polymer solar cells (PSCs) seems to be more challenging. Here, we designed and synthesized two asymmetrical small molecule acceptors (IDT6CN-M and IDT8CN-M) with large dipole moments. We find that the strong intermolecular interaction and favorable antiparallel packing induced by the dipole moment can effectively enhance both lamellar packing and π–π stacking. The PSCs based on PBDB-T:IDT6CN-M and PBDB-T:IDT8CN-M achieved FFs of up to 76.1% and 78.9%, corresponding to PCEs of 11.23% and 12.43%, respectively. To the best of our knowledge, 78.9% FF is a new record for nonfullerene PSCs. Overall, our work provides a simple and effective molecule-designing method to promote FF of nonfullerene PSCs.
Source: openalex_inverted_index · Quality: baseline

Research context

Polymers

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People’s Republic of China

College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China

Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Beijing National Laboratory for Molecular Sciences, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Shenzhen Municipality · Shenzhen Technology and Innovation Commission

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