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以非晶硅薄膜为核心的薄膜晶体管技术目前已经相当成熟,在该技术投入使用并且得以很好地优化之后,要想进一步提高薄膜晶体管的性能,就有必要开发新型的薄膜材料。近年来,由半导体纳米晶体构成的新型薄膜材料在晶体管中的应用越来越受到人们关注。利用半导体纳米晶体制备的薄膜晶体管有着较高的载流子迁移率和开关电流比,同时在其制备过程中可以在较低温度下大面积成膜,能够使用塑料等柔性衬底,因而具有明显的成本优势,发展前景广阔。着重介绍了几种颇具潜力的半导体(如硒化镉、碲化汞、硒化铅、锗、硅)纳米晶体在制备薄膜晶体管方面的应用。 相似文献
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同时测量大气中二氧化碳和水汽浓度的红外气体分析仪 总被引:1,自引:0,他引:1
该仪器是以二氧化碳和水汽对红外线吸收的原理为基础的一种光机电系统。当红外光源通过装在步进电机斩波轮上的滤光片照射到硒化铅(PbSe)检测器上时,就会将气体的浓度变成微弱的电信号,经过相关电路处理,最终得到测量结果。该仪器克服了以前仪器精度不高、灵敏度低、构造复杂等缺点。 相似文献
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采用高温熔融-退火法在钠硼铝硅酸盐(SiO2-B2O3-Na2O-Al2O3-ZnO-AIF3-Na2O)玻璃中生长了PbSe量子点,通过X射线衍射(XRD)、透射电镜(TEM)、光致荧光(PL)谱等研究了玻璃配料中不同ZnO含量对PbSe量子点尺寸和浓度的影响,结果表明,ZnO含量占总玻璃配料质量比约9.4%时,生成的量子点尺寸比较均匀,直径约为6.5nm,且浓度较高,PL谱强度最强,辐射峰位于1790nm,FWHM为296nm。玻璃配料中加入适量的ZnO有助于PbSe量子点的形成,减少Se元素的挥发,使玻璃中的量子点尺寸分布趋于均-化。 相似文献
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《能源与动力工程:英文版》2013,(11):2100-2105
The study of nano properties of PbSe (lead selenide) thin films deposited on TiO2 semi conductor film prepared by sol gel method was a new work destined to perfect the nano materials used in photovoltaic energy. The growth of the first group of the fihns (Set 1: P(9)) & P(14)) was based on the decomposition of lead citrate and sodium selenosulphite in the presence of sodium citrate and sodium hydroxide with ammonia and triethalamine (TEA) acting as the complexing agents and P.H stabilizers; while in the second group (Set 2: Pc15~), the reaction bath was made up of solutions of lead nitrate Pb(NO3)2, PVA (polyvinyl alcohol), H20 (distilled water), NH3 (ammonia), sodium selenosulphite (Na2SeSO3) and Triethalamine [N(CH2CH2OH)], which was used as the complexing agent. The deposited materials were identified by X-ray diffraction. In addition, nano optical and morphological investigations were also performed. The sample P9 has the lowest absorbance of about 0.3 nm in the ultra-violet region. It was found that there was a reduction in the optical absorbance as the wavelength increases. The optical band gap shows a range of 1.26-2.00 eV with sample PcIs~ having the lowest direct band gap. 相似文献