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White-light emission from a blend of CdSeS nanocrystals of different Se : S ratio

机译:Se:S比不同的CdSeS纳米晶体混合物的白光发射

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CdSeS nanocrystals with different bandgap energies have been synthesized by the colloidal method. The solution blend of blue-, green- and red-emitting CdSeS nanocrystals, in appropriate proportions, showed strong white emission of different shades on excitation with a UV source. We observed that the CIE coordinate of the spectrum of a particular blend is independent of excitation wavelength. We also observed that the contribution of self-absorption in energy loss in the blend of CdSeS nanocrystals is not very significant. A white-light-emitting LED has been fabricated by coating a blend mixed with polymethylmethacrylate on a commercial UV-LED.
机译:通过胶体法合成了具有不同带隙能的CdSeS纳米晶体。发射蓝光,绿光和红光的CdSeS纳米晶体的溶液混合物,按适当的比例,在用紫外线源激发后,会显示出不同阴影的强烈白色发射。我们观察到,特定混合物光谱的CIE坐标与激发波长无关。我们还观察到,CdSeS纳米晶体共混物中自吸收对能量损失的贡献不是很明显。通过将与聚甲基丙烯酸甲酯混合的共混物涂覆在商用UV-LED上来制造发白光的LED。

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