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Achieving Eco‐Compatible Organic Solar Cells with Efficiency >16.5% Based on an Iridium Complex‐Incorporated Polymer Donor
Author(s) -
Sun Rui,
Wang Tao,
Luo Zhenghui,
Hu Zhicheng,
Huang Fei,
Yang Chuluo,
Min Jie
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000156
Subject(s) - materials science , photovoltaic system , energy conversion efficiency , polymer , iridium , conjugated system , organic solar cell , acceptor , solubility , polymer solar cell , fullerene , solvent , chemical engineering , charge carrier , nanotechnology , optoelectronics , chemistry , organic chemistry , catalysis , electrical engineering , engineering , physics , condensed matter physics , composite material
The field of polymer solar cells (PSCs) has seen rapid development after the reports of high‐performance photovoltaic materials. Herein, iridium (Ir) complexes (1.5 mol%) are introduced to the polymer backbone of PM6, and a new π‐conjugated polymer PM6‐Ir1.5 is developed. Further analysis indicates that this approach can rationally modify the molecular packing order of PM6 to achieve suitable nanoscale morphology, efficient charge transport properties, and reduced carrier recombination losses, and significantly improve the photovoltaic performance of the resulting PSCs based on Y6‐C2 as non‐fullerene acceptor with good solubility in common solvents. Optimized devices obtain a power conversion efficiency (PCE) of 17.09%, whereas the corresponding devices fabricated using the green solvent achieve a remarkable PCE of 16.52%, which is the highest value reported so far in the literature for non‐halogenated PSCs.