Simple Tricyclic-Based A-π-D-π-A-Type Nonfullerene Acceptors for High-Efficiency Organic Solar Cells

Yuanyuan Zhou; Miao Li; Na Yu; Shuaishuai Shen; Jinsheng Song; Zaifei Ma; Zhishan Bo

doi:10.1021/acsami.1c22520

Simple Tricyclic-Based A-π-D-π-A-Type Nonfullerene Acceptors for High-Efficiency Organic Solar Cells

ACS Appl Mater Interfaces. 2022 Feb 2;14(4):6039-6047. doi: 10.1021/acsami.1c22520. Epub 2022 Jan 21.

Authors

Yuanyuan Zhou^{1

2}, Miao Li¹, Na Yu³, Shuaishuai Shen², Jinsheng Song², Zaifei Ma³, Zhishan Bo¹

Affiliations

¹ Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
² Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China.
³ Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 201620 Shanghai, China.

PMID: 35061346
DOI: 10.1021/acsami.1c22520

Abstract

Nonfused-ring electron acceptors have attracted much attention in recent years due to their advantages of simple synthetic routes, high yields, low costs, reasonable power conversion efficiencies (PCEs), and so on. Herein, three simple A-π-D-π-A-type acceptors (DTC-BO-4F, DTS-BO-4F, and DTP-BO-4F) comprising a tricyclic fused-ring core, two 2,5-bis(alkyloxy)phenylene spacers, and two difluorinated terminal groups (DF-IC) were developed. Compared with DTS-BO-4F, DTC-BO-4F and DTP-BO-4F exhibit higher molar extinction coefficients, stronger crystallinity, and more orderly stacking. The PBDB-T:DTC-BO-4F-based blend film shows suitable phase separation and higher and more balanced charge mobilities. Finally, the photovoltaic devices based on DTC-BO-4F give an outstanding PCE of 13.26% with a small nonradiative voltage loss of 0.23 eV.

Keywords: A-π-D-π-A-type acceptors; intramolecular noncovalent interactions; low cost; organic solar cells; synthetic complexity; tricyclic; π-spacer.