Oligomer-Assisted Photoactive Layers Enable >18 % Efficiency of Organic Solar Cells

Cheng Y, Huang B, Huang X, Zhang L, Kim S, Xie Q, Liu C, Heumüller T, Liu Z, Zhang Y, Wu F, Yang C, Brabec C, Chen Y, Chen L (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Angewandte Chemie International Edition Wiley

DOI: 10.1002/anie.202200329

Abstract

Although ternary organic solar cells (OSCs) have unique advantages in improving device performance, the morphology assembly in the ternary-phase would be more uncertain or complex than that in the binary-phase. Here, we propose a new concept of oligomer-assisted photoactive layers for high-performance OSCs. The formed alloy-like phase of the oligomer : host polymer blend enabled the oligomer-assisted OSCs to fuse the advantages of both binary and ternary devices, exhibiting substantially enhanced performance and stability compared to the control devices. With the addition of oligomers, outstanding efficiencies of 17.33 % for a PM6 : Y6 device, 18.32 % for a PM6 : BTP-eC9 device, and 17.13 % for a PM6/Y6 pseudo-bilayer device were achieved, all of which are one of the highest values in their corresponding fields. The improved performance originated from the downshift energy levels, enhanced light absorption, optimized blend morphology, favorable charge dynamics, and reduced non-radiative energy loss.

Authors with CRIS profile

Chao Liu Institute Materials for Electronics and Energy Technology (i-MEET) Thomas Heumüller Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Nanchang University (NCU) / 南昌大学 CN China (CN) Jiangxi University of Science and Technology CN China (CN) Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원 KR Korea, Republic of (KR)

How to cite

APA:

Cheng, Y., Huang, B., Huang, X., Zhang, L., Kim, S., Xie, Q.,... Chen, L. (2022). Oligomer-Assisted Photoactive Layers Enable >18 % Efficiency of Organic Solar Cells. Angewandte Chemie International Edition. https://dx.doi.org/10.1002/anie.202200329

MLA:

Cheng, Yujun, et al. "Oligomer-Assisted Photoactive Layers Enable >18 % Efficiency of Organic Solar Cells." Angewandte Chemie International Edition (2022).

BibTeX: Download