Unexpected violet and blue light emission from amorphous indium zinc oxide (IZO) with silver nanoparticle embedment

作者：Sun Jian^*; Xu Jianmei; Tang Xiaosheng; Huang Yanhua; Tang Chunhua; Han Chuanliang; Gong Yansheng; Gong Hao

来源：Optical Materials Express, 2015, 5(6): 1331-1338.

DOI：10.1364/OME.5.001331

Uncommon photoluminescence (PL) with fine structure from amorphous indium zinc oxide (IZO) without and with silver (Ag) nanoparticles embedment is observed. Significant enhancement in light emission is found for the sample when the embedded Ag nominal layer thickness is increased to 2 nm. The amorphous IZO (a-IZO) samples with and without Ag layer embedment exhibit two-peak PL at similar to 398nm (similar to 3.12eV, violet light) and similar to 450nm (similar to 2.76 eV, deep blue light), originating from the optical gap emission and the radiative recombination at the defect level. Interestingly, the intensity of the peak at similar to 398nm does not show any obvious change while the intensity of the deep blue light emission at similar to 450nm is significantly increased first and then decreased with the increment of Ag embedment. The unexpectedly enhanced PL at 450nm from IZO with a small amount of Ag embedment is attributed to the coupling between excited electron-hole pairs in IZO films and the surface plasmon of Ag particles. A careful analysis and discussion reveals an interesting mechanism of a-IZO and Ag interaction.

• 出版日期2015-6-1
• 单位重庆大学; 中国地质大学（北京）