| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.882 |
| 발표분야 |
재료(Materials) |
| 제목 |
Two different π-electron distributions of Lumogen F Violet 570 crystals |
| 초록 |
Lumogen F Violet 570 (V570) has been applied to downshift film which can enhance the efficiency of solar cell. However, as the concentration of V570 increases, the ACQ phenomenon which decrease emission intensity occurs. In this study, two crystal phases of V570 were obtained using a tetrahydrofuran (THF) solvent and found that the crystals had optical properties that emit blue (454 nm) and green (513 nm) light. The structure of these two crystals was confirmed by x-ray analysis and it was confirmed that the mechanism having different fluorescence properties is related to the staking structure of V570 intermolecular naphtha group. According to the results of the DFT calculation, the green crystal structure is shared by the π electrons of the naphtha component in the LUMO molecular orbital. On the other hand, in the case of the blue structure, the intermolecular distance is similar to green, but the center distance of the intermolecular naphtha group is long. As a result, π electrons are not shared in the LUMO state. The V570 molecules have a green crystal structure in the thin film state and GIWAXS confirms that the (001) crystal plane is laminated in the predominant direction. |
| 저자 |
조국현1, 이시우1, 이아라1, 전태열2, 이현휘2, 문도현2, 서일완3, 이동렬3, 김효정1
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| 소속 |
1부산대, 2포항공과대, 3숭실대 |
| 키워드 |
재료 |
| E-Mail |
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| 원문파일 |
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