退火与极化温度对尼龙11薄膜驻极体内陷阱能级分布的影响

用热释电技术研究了尼龙11薄膜驻极体制备过程中热处理与极化温度对驻极体陷阱能级分布的影响.结果显示，淬火驻极体的热释电流谱上存在四个空间电荷退陷阱电流峰，而在退火处理后则显示两个退陷阱电流峰.采用多点法对热释电流谱进行理论拟合可以将各个退陷阱电流峰分离并得到它们的陷阱深度参数.这些参数进一步表明，淬火尼龙11薄膜驻极体内存在四个空间电荷的陷阱能级，极化温度升高对它们的分布情况影响不大；退火处理后，陷阱能级减少为两个，且随着极化温度的升高，较浅的陷阱能级有明显向较深陷阱能级接近的趋势. 关键词： 尼龙11 薄膜驻极体 热释电 热处理

Effect of annealing and polarizing temperature on the trap level distribution in nylon 11 film electrets

The effect of annealing and polarizing temperature on the trap level distribution in nylon 11 film electrets has been studied by thermally stimulated depolarization current (TSDC) technique. It was found that there were four detrapping current peaks of space charge in TSDC spectra of the quenched nylon 11 film electret, while two in that of the annealed one. Using multi point method to fit the experimental curves, the detrapping current peaks could be separated and the trap depth was obtained. The results further proved that there were four trap levels of space charge in a quenched electret and the trap level distribution changed little when the polarization temperature increased; while after annealing, there were only two trap levels in the electret. The results also showed that the shallower trap level was obviously close to the deeper trap level when the polarization temperature increased.