Benzodithiophene-Based Small-Molecule Donors for Next-Generation All-Small-Molecule Organic Photovoltaics

Hua Tang, Cenqi Yan, Jiaming Huang, Zhipeng Kan, Zeyun Xiao, Kuan Sun, Gang Li, Shirong Lu

Research output: Journal article publicationReview articleAcademic researchpeer-review

37 Citations (Scopus)

Abstract

Organic solar cells (OSCs) have been considered being a promising candidate for next-generation photovoltaic technology because of their low carbon footprint, short energy payback time, and facile manufacture into lightweight, flexible, and semitransparent products. In this prosperous field, there is a rising trend of developing all-small-molecule (ASM) OSCs due to the distinct merits of small molecules, such as well-defined structures, facile purification, and pre-eminent batch-to-batch replicability, making it a preferential contender for industrialization. The majority of the best-performing ASM OSCs utilize benzodithiophene (BDT) donors, and recent breakthroughs demonstrate that this system has exceeded the 15% efficiency mark in the laboratory. This review analyzes the significant study that has led to this remarkable progress and focuses on the most effective BDT small-molecule donors. The pivotal structure-property relationships, donor-acceptor matching criteria, and morphology control approaches are discussed. Lastly, we summarize the remaining challenges and offer our perspective on the future advance of ASM OSCs.

Original languageEnglish
Pages (from-to)1403-1432
Number of pages30
JournalMatter
Volume3
Issue number5
DOIs
Publication statusPublished - 4 Nov 2020

Keywords

  • benzodithiophene
  • organic solar cells
  • small molecules

ASJC Scopus subject areas

  • Materials Science(all)

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