16.67% Rigid and 14.06% Flexible Organic Solar Cells Enabled by Ternary Heterojunction Strategy

Ternary heterojunction strategies appear to be an efficient approach to improve the efficiency of organic solar cells (OSCs) through harvesting more sunlight. Ternary OSCs are fabricated by employing wide bandgap polymer donor (PM6), narrow bandgap nonfullerene acceptor (Y6), and PC71BM as the third...

Full description

Saved in:
Bibliographic Details
Published in:Advanced materials (Weinheim) 2019-09, Vol.31 (39), p.e1902210-n/a
Main Authors: Yan, Tingting, Song, Wei, Huang, Jiaming, Peng, Ruixiang, Huang, Like, Ge, Ziyi
Format: Article
Language:English
Subjects:
Electromagnetic absorption
Energy conversion efficiency
Energy gap
energy transfer
flexible electronics
Heterojunctions
Materials science
Morphology
Organic chemistry
Photovoltaic cells
Solar cells
Substrates
ternary organic solar cells
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ternary heterojunction strategies appear to be an efficient approach to improve the efficiency of organic solar cells (OSCs) through harvesting more sunlight. Ternary OSCs are fabricated by employing wide bandgap polymer donor (PM6), narrow bandgap nonfullerene acceptor (Y6), and PC71BM as the third component to tune the light absorption and morphologies of the blend films. A record power conversion efficiency (PCE) of 16.67% (certified as 16.0%) on rigid substrate is achieved in an optimized PM6:Y6:PC71BM blend ratio of 1:1:0.2. The introduction of PC71BM endows the blend with enhanced absorption in the range of 300–500 nm and optimises interpenetrating morphologies to promote photogenerated charge dissociation and extraction. More importantly, a PCE of 14.06% for flexible ITO‐free ternary OSCs is obtained based on this ternary heterojunction system, which is the highest PCE reported for flexible state‐of‐the‐art OSCs. A very promising ternary heterojunction strategy to develop highly efficient rigid and flexible OSCs is presented. High efficiencies of 16.67% (certified as 16.0%) for rigid and 14.06% for flexible organic solar cells (OSCs) are achieved by employing a PM6:Y6:PC71BM ternary system. This is a promising ternary heterojunction strategy for the development of highly efficient rigid and flexible OSCs.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201902210