The rapid development of artificial intelligent and internet of things calls for high-performance multifunctional devices for synchronous detection of a wide variety of environmental signals, such as gas, light, and humidity. Herein, highly crystallized tin dioxide (SnO₂) microwires (MWs) with low density of point defects are synthesized by the chemical vapor deposition method and constructed into a multifunctional device for photo and humidity sensing. The device shows excellent photoelectric performances, for example, ultralow dark current of ≈10⁻¹³ A, ultrahigh on–off ratio of >10⁷, UV/visible rejection ratio of R_{300 nm}/R_{400 nm} > 10⁷, specific detectivity (D*) of 1.16 × 10¹⁵ Jones, linear dynamic range (LDR) of 152 dB, high responsivity of 18 A W⁻¹, and fast photoresponse speed of t_rise/t_decay = 2.7 µs/2.5 ms at 5 V bias. Furthermore, the p-CuI/n-SnO₂ heterojunction shows outstanding self-powered properties, such as responsivity of 8.98 mA W⁻¹, specific detectivity of 1.98 × 10¹² Jones and LDR of 106 dB at 0 V bias. Additionally, the SnO₂ MWs also show high sensitivity to ambient humidity changes. Therefore, the SnO₂ MWs show high potential for multifunctional applications, such as UV photodetector and humidity sensor.

中文翻译：

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用于高性能紫外光电探测器和湿度传感器的高度结晶的二氧化锡微丝

人工智能和物联网的快速发展需要高性能的多功能设备来同步检测气体、光、湿度等多种环境信号。在此，通过化学气相沉积法合成了具有低密度点缺陷的高度结晶的二氧化锡 (SnO ₂ ) 微线 (MW)，并将其构建成用于光和湿度传感的多功能器件。该器件显示出优异的光电性能，例如≈10 ^-13  A的超低暗电流，>10 ^{7 的}超高开关比，R _{300 nm} / R _{400 nm}  > 10 ^{7 的}紫外/可见光抑制比, 1.16 × 10 ¹⁵  Jones 的比探测率 ( D *)，152 dB 的线性动态范围 (LDR)，18 AW ^{-1 的}高响应度，t_上升/ t_衰减的快速光响应速度 = 2.7 µs/2.5 ms at 5 V 偏置。此外，p-CuI/n-SnO ₂异质结显示出出色的自供电特性，例如8.98 mA W ^{-1 的}响应度、1.98 × 10 ¹²  Jones 的比检测率和0 V 偏置下的106 dB 的LDR。此外，SnO ₂ MW 还显示出对环境湿度变化的高度敏感性。因此，SnO ₂ MW 显示出多功能应用的巨大潜力，例如紫外线光电探测器和湿度传感器。