2015 Fiscal Year Final Research Report
Widening of optical design freedom of organic thin films for high-performance organic semiconductor devices
| Project/Area Number |
25708038
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Device related chemistry
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 有機半導体デバイス / 屈折率 / 複屈折 / エレクトレット / 分子配向 / 有機EL / 光取り出し効率 / 非晶質有機薄膜 |
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| Outline of Final Research Achievements |
In this study, we extended the control range of the refractive index and birefringence of organic semiconductor films and applied their techniques to organic semiconductor devices to improve the device performances. We newly developed conductive super-low-index charge transport layers by mixing amorphous organic semiconductors and low-index electret materials, and also controlled the birefringence of amorphous organic semiconductor films using molecular orientation. We showed that the outcoupling efficiency of organic light-emitting diodes can be enhanced by these controls of refractive index and birefringence. Furthermore, we analyzed the dependence of the refractive index and birefringence on fabrication processes, and clarified the mechanism of film formation related to the birefringence control.
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| Free Research Field |
有機光物理
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