Stepwise heating in Stille polycondensation toward no batch-to-batch variations in polymer solar cell performance

Changduk Yang,Seungon Jung,Hyesung Park,Sang Myeon Lee,Kwang Hyun Park

doi:10.1038/protex.2018.023

Abstract

Stepwise heating in Stille polycondensation toward no batch-to-batch variations in polymer solar cell performance

Highlights

The resulting ultrahigh-quality polymer-based solar cells demonstrate up to 9.97% power conversion efficiencies \(PCEs), which is over 24% enhancement from the control devices fabricated with commercially available PTB7
We report an efficient and facile stepwise Stille polycondensation with an embedded lowtemperature step for the preferential step growth of low-Mw fractions to formulate high-quality polymers
Electrochemical, and morphological properties between the stepwise protocolderived and commercially available PTB7 polymers, the resulting ultrahigh-quality polymer-based solar cells exhibit superior PCEs of up to 9.97% with impressively negligible device-to-device performance variations, constituting a substantial improvement from control devices based on the commercial polymer

Summary

Introduction

We report an efficient and facile stepwise Stille polycondensation with an embedded lowtemperature step for the preferential step growth of low-Mw fractions to formulate high-quality polymers. ) Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST) Changduk Yang yang@unist.ac.kr

Results

Conclusion