【摘要】 采用荧光粉转换的方法制备了纯绿色LED ,所制备的纯绿光LED的发光峰值在 5 2 0nm ,其半峰宽约为 30nm ,法向光强为 6 0 0mcd。更多还原

【Abstract】 Violet light emitting diodes chip (GaN based) was used as primary light source and BaMg 2Al 16 O 27 ∶Eu 2+ ,Mn 2+ phosphors was used as light conversion materials. The EL spectral peak of violet LED chip is 395nm. The exciting spectra peak of BaMg 2Al 16 O 27 ∶Eu 2+ ,Mn 2+ phosphors is at 340 nm, but the exciting intensity at 388nm is about the 58% of the maxmum exciting intensity at 340nm (peak). The PL spectrum peak of the BaMg 2Al 16 O 27 ∶Eu 2+ ,Mn 2+ phosphors is at 520nm and the FWHM is about 30nm. The PL spectra of BaMg 2Al 16 O 27 ∶Eu 2+ ,Mn 2+ phosphors is similar with that of green LED. The pure green light emitting diodes was fabricated by the way of phosphors conversion. The EL spectra peak of green LED is at 520 and the FWHM is about 30nm. The luminescent intensity is about 600mcd.更多还原