High‐Efficiency Digital Inkjet‐Printed Non‐Fullerene Polymer Blends Using Non‐Halogenated Solvents

Advanced Energy & Sustainability Research

Rasmus R. Schröder¹  Elena Barulina²  Pavlo Perkhun²  Christine Videlot-Ackermann²  Olivier Margeat²  Jörg Ackermann²  Anil Kumar Bharwal³  Jean-Jacques Simon³  Carmen Ruiz Herrero³  David Duché³  Wolfgang Köntges⁴  Martin Pfannmöller⁴  Noriyuki Yoshimoto⁵  Florent Pourcin⁶  Pascal Pierron⁶  Daniel Esteoulle⁶  Sadok Ben Dkhil⁶  Juan Bisquert⁷  Antonio Guerrero⁷  Cedric Gonzales⁷ 

[1] 3DMM2O – Cluster of Excellence (EXC-2082/1 – 390761711) and CAM – Centre for Advanced Materials Heidelberg University 69120 Heidelberg Germany;Aix Marseille University CINAM - Centre Interdisciplinaire de Nanoscience de Marseille UMR CNRS 7325 13288 Marseille France;Aix Marseille University Université de Toulon IM2NP - Institut Matériaux Microélectronique Nanosciences de Provence UMR CNRS 7334 Marseille IM2NP France;CAM – Centre for Advanced Materials Heidelberg University 69120 Heidelberg Germany;Department of Physical Science and Materials Engineering Iwate University Ueda Morioka 020 8551 Japan;Dracula Technologies 3 Rue Georges Auric Valence 26000 France;Institute of Advanced Materials (INAM) Universitat Jaume I Castelló 12006 Spain;

关键词: inkjet printing;    non-fullerene acceptors;    non-halogenated solvents;    organic solar cells;   

DOI  :  10.1002/aesr.202000086

来源: DOAJ

【 摘 要 】

Inkjet printing (IJP) of polymer solar cells is ideal for small‐area off‐grid electronics with low power consumption. However, IJP is quite a complex technique compared with techniques such as spin coating or doctor blading. The IJP of polymer blends is reported based on ITIC derivatives as non‐fullerene acceptors (NFAs) using non‐halogenated solvents. The results show that fluorination of NFA is essential to form highly stable inks in o‐xylene, because ITIC has significantly insufficient solubility compared with ITIC‐4F. The importance of tetralin as a multifunctional co‐solvent for printing highly efficient PM6:ITIC‐4F blends is demonstrated, as even at very low concentrations, tetralin not only improves ink jettability and open nozzle time, but also improves drying behavior of the blend layer, resulting in blends with homogeneous micro‐ and nanoscale morphology. The resulting solar cells using inkjet‐printed polymer blends show a maximum efficiency of 10.1%. Moreover, IJP produces significant changes in the nanoscale and microscale morphology. In particular, the formation of a thin PM6 capping layer on the blend surface along with improved phase separation and crystallinity in both the donor and acceptor greatly reduces the recombination of charge carriers in thick blends, making inkjet‐printed photoactive films very promising for industrial applications.

【 授权许可】

Unknown