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以氯化钼和氯化镍、氯化铝、无水乙醇和乙二醇为主要原料,采用溶胶凝胶法结合旋涂工艺,在石英基片上制备了MoO2-NiO-Al2O3多层渐变太阳能选择性吸收涂层,通过扫描电子显微镜观察了涂层的断面形貌并测量出了涂层厚度,通过紫外可见光分光光度计、傅里叶红外光谱仪等仪器对涂层光学性能进行了分析表征。结果表明:当高、中、低掺杂层的填充因子分别为0.95,0.43,0.18,高掺杂、中掺杂、低掺杂、减反射层各层的溶胶体积分别为0.2,0.18,0.22,0.08ml时,MoO2-NiO-Al2O3涂层的光吸收性能最佳,吸收率为90%。并通过研究发现,在紫外-可见-近红外光范围内,填充因子对复合涂层光吸收性能的影响随太阳光波段的不同而不同,并且随着缺少了的掺杂层的填充因子的增大,反射光谱第一个干涉极小值点蓝移,随着缺少了的掺杂层的填充因子的减小,干涉峰变平坦甚至消失。
MoO_2-NiO-Al 2 O 3 multi-gradient solar energy was prepared on quartz substrate using molybdenum chloride and nickel chloride, aluminum chloride, absolute ethanol and ethylene glycol as the main raw materials by sol-gel method combined with spin-coating Absorption coating was observed by scanning electron microscopy and the coating thickness was measured. The optical properties of the coatings were characterized by UV-visible spectrophotometer and Fourier transform infrared spectroscopy. The results show that when the fill factors of high, medium and low doped layers are 0.95, 0.43, 0.18, respectively, the sol volume of highly doped, medium doped, low doped and antireflective layers are 0.2,0.18,0.22 , 0.08ml, MoO2-NiO-Al2O3 coating the best light absorption properties, the absorption rate of 90%. And through the study found that in the UV - VIS - NIR range, the fill factor on the composite coating light absorption properties vary with the solar band, and with the lack of doping layer fill factor increase The first interference minimum of blue and large reflection spectrum is blue-shifted, and the interference peak flattens or even disappears as the fill factor of the missing doped layer decreases.