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• W2014925275 abstract "발광층에 도펀트가 도핑된 다층 유기발광다이오드 소자 구조에서의 발광 메카니즘을 검증하기 위해 전기적인 특성요인들을 수치해석 하였다. 본 논문에 적용한 유기발광다이오드 소자는 ITO/NPB/<TEX>$Alq_3$</TEX>:C545T(%)/<TEX>$Alq_3$</TEX>/LiF/Al으로 이루어져 있으며 도펀트인 C545T의 도핑 농도를 변화시킨 4종류의 소자 구조에 대해 특성 변화를 검토하였다. 그 결과 도펀트의 도핑 농도 변화에 따라서 전압-전류 특성이 변화되어짐을 확인하였고, 이는 참고 문헌에 제시되어 있는 전압-전류밀도 실험 데이터와 매우 잘 일치되었다. 또한 도펀트를 도핑시킨 소자 구조들에서 전압-휘도 특성이 대폭 향상되어 발광효율이 3배정도 향상되었다. 이와 같은 guest-host system이 적용된 유기발광다이오드 소자의 동작 메카니즘을 분석하기 위하여 소자 내부에서의 전계분포, 전하분포, 재결합율 등의 전기적인 항목들에 대한 특성의 변화를 관찰하였다. We have performed numerical simulations of the electrical characteristics for multi-layer organic light emitting diode devices with doped emitting layer using a commercial simulation program. In this paper, the basic structure consists of the ITO/NPB/<TEX>$Alq_3$</TEX>:C545T(%)/<TEX>$Alq_3$</TEX>/LiF/Al, four devices that were composed of <TEX>$Alq_3$</TEX> as the host and C545T as the green dopant with different concentration, were studied. As the result, the variations of the doping concentration rate of C545T have a effect on the voltage-current density characteristics. The voltage-current characteristics are quite consistent with the results which were experimentally determined in a previous reference paper. In addition, the voltage-luminance characteristics were greatly improved, and the luminous efficiency was improved three times. In order to analyze these driving mechanism, we have investigated the distribution of electric field, charge density of the carriers, and recombination rates in the inner of the OLED devices." @default.
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• W2014925275 date "2010-03-31" @default.
• W2014925275 modified "2023-10-16" @default.
• W2014925275 title "Simulations of Electrical Characteristics of Multi-layer Organic Light Emitting Diode Devices with doped Emitting Layer" @default.
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• W2014925275 doi "https://doi.org/10.5762/kais.2010.11.3.827" @default.
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