Surface-Doped Quasi-2D Chiral Organic Single Crystals for Chiroptical Sensing
SCIE
SCOPUS
- Title
- Surface-Doped Quasi-2D Chiral Organic Single Crystals for Chiroptical Sensing
- Authors
- KOO, JINYOUNG; Xiaobo Shang; Inho Song; Jeong Hyeon Lee; Wanuk Choi; Jaeyong Ahn; Hiroyoshi Ohtsu; Jin Chul Kim; Sang Kyu Kwak; Joon Hak Oh
- Date Issued
- 2020-10-27
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Chiral organic optoelectronics using circularly polarized light (CPL) as the key element in the photonic signal has recently emerged as a next-generation photonic technology. However, it remains challenging to simultaneously achieve high polarization selectivity and superior optoelectronic performance. Supramolecular two-dimensional (2D) chiral organic single crystals may be, good candidates for this purpose due to their defect-free nature, molecular diversity, and morphologies. Here, quasi-2D single crystals of chiral perylene diimides with parallelogram and triangle/hexagon morphologies have been selectively fabricated via self-assembly using different cosolvent systems. These materials exhibit amplified circular dichroism (CD) spectral signals, due to their molecular packing modes and supramolecular chirality. Through molecular surface n-doping using hydrazine, chiral single crystals exhibit electron mobility surpassing 1.0 cm(2) V-1 s(-1), which is one of the highest among chiral organic semiconductors, and excellent optoelectronic functions. Theoretical calculations reveal that the radical anions formed by n-doping increase the electron affinity and/or reduce the energy gap, thus facilitating electron transport. More importantly, the doped organic chiral crystals selectively discriminate CPL handedness with a high anisotropy factor of photoresponsivity (similar to 0.12). These results demonstrate that surface-doped quasi-2D chiral organic single crystals are highly promising for chiral optoelectronics.
- Keywords
- SUPRAMOLECULAR CHIRALITY; PYRONIN-B; PERFORMANCE; DIIMIDE; TRANSISTOR; NANOWIRES; MOLECULES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/104502
- DOI
- 10.1021/acsnano.0c07012
- ISSN
- 1936-0851
- Article Type
- Article
- Citation
- ACS NANO, vol. 14, no. 10, page. 14146 - 14156, 2020-10-27
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