One-Step Blade-Coated Highly Efficient Nonfullerene Organic Solar Cells with a Self-Assembled Interfacial Layer Enabled by Solvent Vapor Annealing
Artikel i vetenskaplig tidskrift, 2019

A pronounced enhancement of the power conversion efficiency (PCE) by 38% is achieved in one-step doctor-blade printing organic solar cells (OSCs) via a simple solvent vapor annealing (SVA) step. The organic blend composed of a donor polymer, a nonfullerene acceptor, and an interfacial layer (IL) molecular component is found to phase-separate vertically when exposed to a solvent vapor-saturated atmosphere. Remarkably, the spontaneous formation of a fine, self-organized IL between the bulk heterojunction (BHJ) layer and the indium tin oxide (ITO) electrode facilitated by SVA yields solar cells with a significantly higher PCE (11.14%) than in control devices (8.05%) without SVA and in devices (10.06%) made with the more complex two-step doctor-blade printing method. The stratified nature of the ITO/IL/BHJ/cathode is corroborated by a range of complementary characterization techniques including surface energy, cross-sectional scanning electron microscopy, grazing incidence wide angle X-ray scattering, and X-ray photoelectron spectroscopy. This study demonstrates that a spontaneously formed IL with SVA treatment combines simplicity and precision with high device performance, thus making it attractive for large-area manufacturing of next-generation OSCs.

interfacial layer

self-assembly

solvent vapor annealing

one-step doctor-blade

nonfullerence organic solar cell

Författare

Yuanbao Lin

King Abdullah University of Science and Technology (KAUST)

Jinan University

Liyang Yu

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Yuxin Xia

Dept Phys Chem & Biol IFM

Yuliar Firdaus

King Abdullah University of Science and Technology (KAUST)

Sheng Dong

South China University of Technology

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Olle Inganas

Dept Phys Chem & Biol IFM

Fei Huang

Dept Phys Chem & Biol IFM

South China University of Technology

Thomas D. Anthopoulos

King Abdullah University of Science and Technology (KAUST)

Fengling Zhang

Jinan University

Lintao Hou

Jinan University

SOLAR RRL

2367-198X (ISSN)

Vol. 3 8 1900179

Ämneskategorier

Fysikalisk kemi

Materialkemi

DOI

10.1002/solr.201900179

Mer information

Senast uppdaterat

2019-10-02