期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 12, 期 46, 页码 11430-11437出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c03094
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资金
- Nanotechnology Platform Programs Molecule and Material Synthesis of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [JPMXP09S19MS0018, JPMXP09S20MS0007, JPMXP09S21MS0010]
- JASRI [2020A1627]
- PF Program Advisory Committee [2018S2-005]
- JSPS-KAKENHI [JP21H05405, JP21H05411]
- Futaba Foundation
- JST PRESTO [JPMJPR2101]
This study demonstrates a method to achieve high-quality crystalline interfaces through quasi-homoepitaxial growth, and confirms that minimizing lattice mismatch can enhance the crystalline qualities at heterojunctions, potentially opening up new possibilities for high-mobility organic semiconductor optoelectronics.
Single-crystalline organic semiconductors exhibiting band transport have opened new possibilities for the utilization of efficient charge carrier conduction in organic electronic devices. The epitaxial growth of molecular materials is a promising route for the realization of well-crystallized organic semiconductor p-n junctions for optoelectronic applications enhanced by the improved charge carrier mobility. In this study, the formation of a high-quality crystalline interface upon quasi-homoepitaxial growth of bis(trifluoromethyl)dimethylrubrene (fmRub) on the single-crystal surface of rubrene was revealed by using out-of-plane and grazing-incidence X-ray diffraction techniques. Ultraviolet photoelectron spectroscopy results indicated abrupt electronic energy levels and the occurrence of band bending across this quasi-homoepitaxial interface. This study verifies that the minimization of the lattice mismatch enhances the crystalline qualities at the heterojunctions even for van der Waals molecular condensates, potentially opening an untested route for the realization of high-mobility organic semiconductor optoelectronics.
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