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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Controllably realizing elastic/plastic bending based on a room-temperature phosphorescent waveguiding organic crystal
Hao Liu1, Zhengyi Bian1, Qinyu Cheng1
1State Key Laboratory of Supramolecular Structure and Materials , College of Chemistry , Jilin University , Qianjin Street , Changchun , P. R. China .
Chemical Science
|February 5, 2019
Summary
This study combines elastic and plastic bending in a single room-temperature phosphorescence (RTP) crystal, 4,4'-dibromobenzil (DBBZL). The research reveals insights into crystal plasticity and enables phosphorescent optical waveguides in bent states.
Area of Science:
- Materials Science
- Crystal Engineering
- Organic Electronics
Background:
- Flexible organic single crystals are a key area in crystal engineering.
- Crystal elasticity and plasticity are typically considered incompatible.
- Room-temperature phosphorescence (RTP) applications often overlook the crystallographic nature of single crystals.
Purpose of the Study:
- To combine elastic and plastic bending properties within a single RTP crystal.
- To investigate the mechanism of elastic and plastic bending in crystals.
- To demonstrate the application of such crystals in phosphorescent optical waveguides.
Main Methods:
- Synthesis and characterization of 4,4 -dibromobenzil (DBBZL) RTP crystal.
- Mechanical testing to evaluate elastic (reversible) and plastic (irreversible) bending behaviors.
- Fabrication and testing of phosphorescent optical waveguides using the DBBZL crystal in various bent states.
Main Results:
- The DBBZL crystal exhibits distinct elastic and plastic bending behaviors.
- An in-depth understanding of the transformation between elastic and plastic bending was achieved.
- The first large single RTP crystal phosphorescent optical waveguides were successfully demonstrated in straight, elastically bent, and plastically bent states.
Conclusions:
- Elasticity and plasticity can be integrated into a single RTP crystal.
- The study provides crucial insights into the mechanisms of elastically and plastically bendable crystals.
- This work opens new avenues for flexible RTP materials in optical waveguide applications.
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