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电子传输层厚度对LiBq₄蓝色有机电致发光器件的影响

Effect of Thickness of Electron Transporting Layer on Blue Organic Electroluminescent Device Using LiBq₄ as an Active Layer

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【Author】 WU You-zhi, ZHENG Xin-you, ZHU Wen-qing, ZHANG Bu-xin, JIANG Xue-yin, ZHANG Zhi-lin, XU Shao-hong (Department of Materials Science,Shanghai University,Shanghai 201800, CHN)

【机构】上海大学嘉定校区材料科学系；上海大学嘉定校区材料科学系上海201800；上海201800； ?；

【摘要】制备了以LiBq4 为发光层 ,结构为ITO/CuPc/TPD/LiBq4 /Alq3 /LiF/Al的器件。器件的电致发光 (EL)光谱与LiBq4 薄膜的光致发光 (PL)光谱相同 ,峰值波长均为 4 92nm。改变电子传输层Alq3 的厚度时 ,器件的电流 -电压特性及发光光谱随之发生变化 ,当电子传输层的厚度为 5nm时 ,既可以避免电子传输层的发光 ,又可以降低器件的工作电压。更多还原

【Abstract】 Devices with the structure of ITO/CuPc/TPD/LiBq₄/Alq₃/LiF/Al,LiBq₄ used as an active layer,were prepared. Electroluminescence （EL） spectra of the devices are very similar to photoluminescence （PL） spectrum of the single deposited LiBq₄ film with peak wavelength at 492 nm.The current-voltage characteristics and the luminescence of the devices have the dependence on thickness of the electron transporting layer （ETL） Alq₃.We found that the operating voltage of the device may be reduced without emergence of luminescence of ETL as the thickness of the ETL equals 5 nm.更多还原