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Updated: May 15, 2025
Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Unveiling high-mobility hot carriers in a two-dimensional conjugated coordination polymer
Shuai Fu1,2, Xing Huang1, Guoquan Gao3
1Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, Germany.
Highly mobile hot carriers were discovered in organic copper benzenehexathiol (Cu3BHT) films. These findings pave the way for advanced organic optoelectronics utilizing hot carrier transport.
Area of Science:
- Materials Science
- Organic Electronics
- Photophysics
Background:
- Hot carriers are crucial for optoelectronics but underexplored in organic systems.
- Understanding non-equilibrium charge transport is key to advancing organic optoelectronic devices.
Purpose of the Study:
- To investigate hot carrier mobility in crystalline two-dimensional conjugated coordination polymers.
- To explore the potential of organic materials for hot carrier applications.
Main Methods:
- Ultrafast spectroscopic and imaging techniques were employed.
- Charge transport was mapped in Cu3BHT films after photoexcitation.
- Temporal, spatial, and frequency domains were analyzed.
Main Results:
- Two distinct high-mobility transport regimes were identified in Cu3BHT films.
- Ultrahigh hot carrier mobility of ~2,000 cm2 V-1 s-1 was observed in the non-equilibrium regime.
- Remarkable quasi-equilibrium mobility of ~400 cm2 V-1 s-1 and diffusion length >1 μm were achieved.
Conclusions:
- Two-dimensional conjugated coordination polymers exhibit highly mobile hot carriers.
- Cu3BHT films demonstrate significant potential for organic hot carrier optoelectronics.
- This research opens new avenues for organic-based hot carrier device applications.
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