Bi₂Sr₂CaCu₂O_8+x (Bi-2212) thin film with a thickness of micrometers was prepared by a sol-gel method using metal acetate as starting material. The crystal orientation and the superconducting properties of the thin film were studied. Besides, a pattern with a diameter of 300 µm and a thickness of 1.05 µm was prepared. The I-V curve indicates that the biaxially-textured Bi-2212 thin film has a zero-voltage overcurrent and shows a voltage jump under the zero-voltage current. These characteristics are similar to those of a single crystal and exhibit the unique Josephson effect of a intrinsic junction. In the superconducting state, the zero-voltage current increases linearly with the temperature decresing and the hysteresis area of the curve increases gradually. Further analysis indicates that its I-V characteristics are similar to those of a terahertz source device made from Bi-2212 single crystal. Based on these findings, it is predicted that it may generate THz waves with a frequency range of 0.144 THz-1.29 THz. The radiation frequency can be further regulated by controlling the thickness and bias voltage of the biaxially textured film as well as the envirmental temperature.

Bi ₂ Sr ₂ CaCu ₂ O _{8+ x}(Bi-2212) 厚度为微米的薄膜是通过溶胶-凝胶法使用金属醋酸盐作为起始材料制备的。研究了薄膜的晶体取向和超导特性。此外，制备了直径为300μm、厚度为1.05μm的图案。IV曲线表明双轴织构Bi-2212薄膜存在零电压过电流，在零电压电流下出现电压跳变。这些特性与单晶相似，并表现出本征结的独特约瑟夫森效应。在超导状态下，零电压电流随温度的降低呈线性增加，曲线的磁滞面积逐渐增加。进一步分析表明，其 IV 特性类似于由 Bi-2212 单晶制成的太赫兹源器件。基于这些发现，预测它可能产生频率范围为0.144 THz-1.29 THz的太赫兹波。可以通过控制双轴织构薄膜的厚度和偏置电压以及环境温度来进一步调节辐射频率。