在有机发光器件中,掺杂染料分子是改变发光颜色,提高发光性能的有利手段。在掺杂体系中,主体材料向掺杂剂的能量传递是主要的激发态弛豫过程。在LEC器件中,利用掺杂手段改变发光颜色的方法报道很少。研究了以发射绿光(峰值550nm)的共聚物Poly[(BEHP-PPV)-co-(MEH-PPV)]中掺杂DCJTB作为功能层的LEC器件的发光特性。器件的结构为ITO/Poly[(BEHP-PPV)-co-(MEH-PPV)]:DCJTB+PEO+LiCF3SO3/Al。共聚物的光致发光光谱几乎覆盖了整个DCJTB吸收光谱的范围,满足能量传递的要求。通过光致发光与电致发光光谱的研究,发现掺杂后的薄膜不论是光致发光还是电致发光,都以DCJTB的发射为主,说明二者之间的确存在能量传递。 In organic light-emitting devices, doping of dye molecules is an advantageous means of changing the color of light emission and improving the light-emitting performance. In doping systems, the energy transfer from the host material to the dopant is the predominant relaxed state of the excited state. In LEC devices, the use of doping means to change the color of the light method is rarely reported. Studied the light emission characteristics of a LEC device doped with DCJTB as a functional layer in a copolymer Poly [(BEHP-PPV) -co- (MEH-PPV)] which emits green light having a peak of 550 nm. The structure of the device is ITO / Poly [(BEHP-PPV) -co- (MEH-PPV)]: DCJTB + PEO + LiCF3SO3 / Al. The photoluminescence spectrum of the copolymer covers almost the entire range of the absorption spectrum of DCJTB, meeting the energy transfer requirements. Through the study of photoluminescence and electroluminescence spectra, it was found that the doped films, whether photoluminescence or electroluminescence, are dominated by the emission of DCJTB, indicating that there is indeed energy transfer between the two.