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Updated: Oct 3, 2025
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
The effect of non-covalent conformational locks on intra-molecular charge transport of OPV units
Jingjing Ma1, Yangyang Shi1, Zhiye Wang1
1The State Key Laboratory of Refractories and Metallurgy, and Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan 430081, China. yc.l@wust.edu.cn.
Abstract:
Although organic photovoltaic (OPV) molecules containing non-covalent conformational locks (NCLs) are demonstrated with superior device scale charge transport, the NCLs' working mechanism at the molecular level has not been directly addressed or revealed. Herein, three widely used OPV building blocks DT-BT, DT-FBT, and DT-OBT were prepared and comparatively researched for their intra-molecule charge transport (ICT) based on single molecular conductance measurements and theoretical calculation. The measured conductance (G) of the three molecules displays an order of GDT-BT < GDT-FBT < GDT-OBT, contradicting the conductivity order predicted by tunnelling theory. Further research demonstrated that this change was mainly caused by NCLs embedded in DT-FBT and DT-OBT, resulting in more efficient charge transporting pathways, evidenced by their HOMOs showing hyper-conjugation characteristics.
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