Quenching to the Percolation Threshold in Organic Solar Cells

By Long Ye, Sunsun Li, Xiaoyu Liu, Shaoqing Zhang, Masoud Ghasemi, Yuan Xiong, Jianhui Hou, H. Ade. Joule, 2019

184 citations recorded by the source corpus.

Summary The general lack of knowing the quench depth and the convolution with key kinetic factors has confounded deeper understanding of the respective importance of these factors in the morphology development of organic solar cells. Here, we determine the quench depth of a high-efficiency system and delineate the need to kinetically quench the mixed domains to a composition close to the percolation threshold. Importantly, the ability to achieve such a quench is very sensitive to structural parameters in polymer solar cells (PSCs) of the polymer PBDB-TF. Only the highest-molecular-weight polymer is able of earlier liquid-solid transition to “lock in” a high-performing PSC morphology with a composition above the miscibility limit and with an efficiency of over 13%. Systems with deep quench depths are therefore sensitive to molecular weight and the kinetic factors of the casting, likely impacting fabrication yield and reliability. They also need to be vitrified for stable performance.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/e4ebbdf755cccee7cf56604b6be2d7f568f1ec1f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

1. H. Ade
2. W. You
3. Iain McCulloch
4. S. Ludwigs
5. Jianhui Hou

In Polymers and Plastics

1. H. Ade
2. W. You
3. Iain McCulloch
4. S. Ludwigs
5. Jianhui Hou

Citations in the corpus

• Delineation of Thermodynamic and Kinetic Factors that Control Stability in Non-fullerene Organic Solar Cells (2019, background): “We note that the percolation threshold is 25% of NF-SMA.(45) Point C represents the crystallization of NF-SMAs in a blend.”