1
|
Sun B, Xu X, Zhou G, Tao L, Xinran W, Chen Z, Xu JB. Observation of Strong J-Aggregate Light Emission in Monolayer Molecular Crystal on Hexagonal Boron Nitride. J Phys Chem A 2020; 124:7340-7345. [PMID: 32786963 DOI: 10.1021/acs.jpca.0c03709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
J-aggregates are widely used in studies of light-matter interaction and organic optoelectronic devices. Although J-aggregate films can be fabricated on salt by epitaxial growth method, the size is limited to hundreds of nanometer. In this work, with hexagonal boron nitride (h-BN) as a substrate, highly crystalline J-aggregate ultrathin films of N,N'-ditridecylperylene 3,4,9,10-tetracarboxylic diimide (PTCDI-C13) are achieved by physical vapor transport (PVT) method. Significant bathochromically shifted absorption band and narrowed 0-0 transition are observed in the monolayer PTCDI-C13 crystal on h-BN. The exciton coherence number Ncoh of monolayer J-aggregate film extracted from the photoluminescence (PL) spectrum is up to 15 at T = 140 K, which is higher than that of the epitaxially grown layer on salt. Beyond the first molecular layer, the multilayer crystal on h-BN is dominated by H-aggregates. Further study shows that that the first molecular layer on h-BN adopts the highly ordered face-on configuration, while the overlayers adopt the edge-on motif. As a comparison, only H-aggregate PTCDI-C13 ultrathin films are found on SiO2 substrates, but no J-aggregates. The results suggest that high-quality J-aggregates can be prepared by utilizing appropriate substrates via physical vapor transport.
Collapse
Affiliation(s)
- Beilei Sun
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| | - Xin Xu
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| | - Guodong Zhou
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| | - Li Tao
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| | - Wang Xinran
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, Jiangsu, P. R. China
| | - Zefeng Chen
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| | - Jian-Bin Xu
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China.,Materials Science and Technology Research Center, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P. R. China
| |
Collapse
|
2
|
Shidara Y, Abiko Y, Fukushi K, Kimura Y, Hirayama S, Machida H, Fujimori A. Creation of High-Density and Low-Defect Molecular Films with a Flat-on Conformation by Interfacial Organization of Triphosphasumanene Trisulfides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9684-9693. [PMID: 31288523 DOI: 10.1021/acs.langmuir.9b00598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This paper focuses on the formation of high-density, low-defect monolayers of triphosphasumanene trisulfides, which are newly synthesized electronic and geometric Janus-type molecules, in a flat-on conformation. Although the molecules stack easily because of the developed π-conjugated plane, their application as a metal coating in a flat-on conformation via an interfacial molecular film enables the work function to be tuned. Surface pressure-area isotherms of the triphosphasumanene trisulfides show a two-dimensional phase transition at the air/water interface. Atomic force microscopy observations of the transferred monolayer and in- and out-of-plane X-ray diffraction patterns of the corresponding multilayers reveal that this phase transition occurs from the flat-on to the end-on conformation. The X-ray diffraction patterns obtained in the two directions completely reversed before and after the phase transition, indicating that the molecular arrangement that is generated by layers of molecular films and resultant molecular stacking is similar. The flat-on conformation of the molecules was evident from the out-of-plane X-ray diffraction and polarized infrared spectroscopy results, which indicate that a large, low-defect monomolecular film is obtained using a toluene solution with a small diffusion coefficient. The spectroscopic results reveal triphosphasumanene trisulfide aggregation in the organized molecular film, suggesting high-density molecular packing.
Collapse
Affiliation(s)
- Yusaku Shidara
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Yoshinori Abiko
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Keito Fukushi
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Yusuke Kimura
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Shuhei Hirayama
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Hiroki Machida
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| | - Atsuhiro Fujimori
- Graduate School of Science and Engineering , Saitama University , 255 Shimo-okubo, Sakura-ku , Saitama 338-8570 , Japan
| |
Collapse
|
3
|
Bricks JL, Slominskii YL, Panas ID, Demchenko AP. Fluorescent J-aggregates of cyanine dyes: basic research and applications review. Methods Appl Fluoresc 2017; 6:012001. [DOI: 10.1088/2050-6120/aa8d0d] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
4
|
Miura S, Shidara Y, Yunoki T, Mamun MAA, Shibasaki Y, Fujimori A. High-Density Packing of Amorphous Polymer with Bulky Aromatic Rings in Interfacial Molecular Films. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600520] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuntaro Miura
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Yusaku Shidara
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Takeru Yunoki
- Department of Functional Materials Science; Saitama University; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Muhammad Abdullah Al Mamun
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| | - Yuji Shibasaki
- Faculty of Engineering; Iwate University; 3-18-8 Ueda Morioka Iwate 020-8550 Japan
| | - Atsuhiro Fujimori
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan
| |
Collapse
|
5
|
Peculiarities of interactions between 6-aminophenalenone dye and polyurethane matrix. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0564-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|