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使用n沟道耗尽型结型场效应晶体管制成了光敏场效应管,由于融合了硅光电池和结型场效应管高输入阻抗和噪音低的优点,光敏场效应管与其他光敏元件相比有下列优点:(1)灵敏度高;(2)线性动态范围大,使用照度范围为10~(-3)～10~4勒克司;(3)光谱响应范围自紫外到近红外范围;(4)响应时间较快;(5)输出阻抗低;(6)可作为吸收值测定元件;(7)体积小、电路简单及价格低廉。应用光敏场效应管作为光敏元件制作了单波长双光路紫外检测器,并用于高速液相层析仪器中。经混合芳烃、核苷及核苷酸、苯及苯衍生物的三组分离试验表明本检测器在灵敏度和流动池的设计上能满足高速液相层析的使用要求。
The use of n-channel depletion-type junction field effect transistors made of photosensitive field-effect tube, due to the integration of silicon photovoltaic cells and junction field effect transistor high input impedance and low noise advantages, the photosensitive field-effect transistor compared with other photosensitive elements Has the following advantages: (1) high sensitivity; (2) linear dynamic range, the use of illumination range of 10 ~ (3) ~ 10 ~ 4 lux; (3) spectral response from the ultraviolet to the near infrared range; ) Fast response time; (5) low output impedance; (6) can be used as the absorption value of the determination of components; (7) small size, simple circuit and low prices. The application of photosensitive field-effect transistor as a photosensitive element made a single-wavelength dual-beam UV detector and was used in high-speed liquid chromatography equipment. Three sets of separation experiments of mixed aromatics, nucleosides and nucleotides, benzene and benzene derivatives show that the detector meets the requirements for high-speed liquid chromatography in terms of sensitivity and flow cell design.