Diisopropylammonium bromide (DIPAB) is reported to be ferroelectric with a spontaneous polarization of 23 μC cm−2 above room temperature, which is close to that of BaTiO3. However, it is difficult to grow single crystals of DIPAB with a ferroelectric phase at room temperature. Here, a solution method using 12-crown-4 as an additive in solvent is found to easily obtain ferroelectric DIPAB single crystals. It indicates that the addition of 12-crown-4 facilitates the crystallization of a ferroelectric DIPAB crystal. Ferroelectric DIPAB's pyroelectric coefficient measured by dynamic pyroelectric current is about 65–325 μC m−2 K−1 at room temperature, which reveals that DIPAB is a good candidate for infrared detectors. Therefore, this modified method is very useful to grow ferroelectric DIPAB and its derivative.
据报道,
二异丙基溴化铵(
DIPAB)具有
铁电性,在室温以上的自发极化为 23 μC cm-2,与 BaTiO3 接近。然而,很难在室温下生长出具有
铁电相的
DIPAB 单晶体。在此,我们发现了一种以 12-crown-4 作为溶剂添加剂的溶液法,可以轻松获得
铁电相
DIPAB 单晶。这表明,添加 12-crown-4 可促进
铁电
DIPAB 晶体的结晶。用动态热释电电流测量的
铁电
DIPAB 热释电系数在室温下约为 65-325 μC m-2 K-1,这表明
DIPAB 是红外探测器的良好候选材料。因此,这种改良方法对生长
铁电
DIPAB 及其衍
生物非常有用。