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논문 기본 정보

자료유형
학술저널
저자정보
Hee Seon Lim (KAIST) Sehun Kim (KAIST) Jeong Won Kim (Korea Research Institute of Standards and Science)
저널정보
한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.23 No.6
발행연도
2014.11
수록면
351 - 356 (6page)

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초록· 키워드

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The electronic structure at organic-organic interface gives essential information on device performance such as charge transport and mobility. Especially, the molecular orientation of organic material can affect the electronic structure at interface and ultimately the device performance in organic photovoltaics. The molecular orientation is examined by the change in ionization potential (IP) for metal phthalocyanines (MPc, M=Zn, Cu)/fullerene (C60) interfaces on ITO by adding the CuI templating layer through ultraviolet photoelectron spectroscopy measurement. On CuPc/C60 bilayer, the addition of CuI templating layer represents the noticeable change in IP, while it hardly affects the electronic structure of ZnPc/C60 bilayer. The CuPc molecules on CuI represent relatively lying down orientation with intermolecular π-π overlap being aligned in vertical direction. Consequently, in organic photovoltaics consisting of CuPc and C60 as donor and acceptor, respectively, the carrier transport along the direction is enhanced by the insertion of CuI templaing layer. In addition, optical absorption in CuPc molecules is increased due to aligned transition matrix elements. Overall the lying down orientation of CuPc on CuI will improve photovoltaic efficiency.

목차

I. Introduction
II. Experimental
III. Results and Discussion
IV. Conclusion
References

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