Related Experiment Video
Updated: May 10, 2025

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
Ternary Blend Organic Photovoltaics with High Efficiency and Stability Through Energy Transfer and Molecular Packing
Bin Chang1, Chung-Hao Chen1, Atsushi Yabushita2
1Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
Abstract:
A novel A-D-A type small molecule (DTP-2EH-IO2Cl) incorporating dithiophenepyrrole (DTP) core with indene-dione (IO2Cl) side chain with an intermediate band gap and rigid structure is incorporated into polymer donor PM6 and one of the three A-DA'D-A small molecule acceptor-L8-BO, BTP-eC9 or Y6-for ternary-blend organic photovoltaics (OPVs). The third component DTP-2EH-IO2Cl induces not only energy transfer but also stronger molecular packing of the acceptors, resulting in a larger coherence length and enhanced absorption that enhances devices' power conversion efficiencies (PCE) and thermal stability. The PCE values of the champion ternary-blend devices PM6:L8-BO, PM6:BTP-eC9, and PM6:Y6 incorporating DTP-2EH-IO2Cl are 19.2, 18.3, and 17.6%, respectively, versus 16.5, 15.8, and 15.4% for their corresponding binary blend devices, displaying relative increases from 14 to 16%. The thermal stability (T80) of the PM6:L8-BO: DTP-2EH-IO2Cl ternary blend device increases dramatically to 568 h from 57 h for the PM6:L8-BO binary blend device. These enhancements can be attributed to the effectiveness of the A-D-A type rigid DTP-2EH-IO2Cl as the third component in increasing light absorption through energy transfer and inducing intermolecular packing to the A-DA'D-A acceptors, providing an effective way to tune the morphology and to boost both the PCE and thermal stability of OPVs.
More Related Videos
08:29Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
11:26Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Related Concept Videos
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview
P-N junction
The Z-Scheme of Electron Transport in Photosynthesis