Enhanced optical properties of zns-zno (nanocomposite) quantum dots prepared by a cost-effective method for optolectronic devices

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	Enhanced optical properties of zns-zno (nanocomposite) quantum dots prepared by a cost-effective method for optolectronic devices
其他题名	Enhanced optical properties of zns-zno (nanocomposite) quantum dots prepared by a cost-effective method for optolectronic devices
	DR.G.JANITA CHRISTOBEL,; DR.C.K. MAHADEVAN
	2018-08-10
专利权人	DR.G.JANITA CHRISTOBEL
公开日期	2018-08-10
授权国家	印度
专利类型	发明申请
摘要	ABSTRACT ZnSxO,-x[with x=0 (Pure ZnS),0.8,0.6,0.5, 0.4, 0.2 and 0.0 (Pure ZnO)] quantum dots were prepared by using Mahadevan"s method which is nothing but a simple solvothermal method that involves the usage of domestic microwave oven and simple chemicals. UV-Vis-NIR absorption, photoluminescence (PL) and photoconductivity (PC) measurements were carried out to understand the optical properties of the prepared quantum dots. The UV absorption edges of all quantum dots show a blue shift and fall within 310-350 ran except for ZnO which is around 370 ran. Further, ZnSo.sOo.s exhibits the minimum. The PL spectra have five prominent peaks (two peaks coupled) around 408, 446, 486, 490 and 530 ran indicating clearly that the mixed quantum dots (nanocomposites) have very high PL yield compared to that of end members (ZnS and ZnO). Similarly, the photo current gains observed for mixed ones are higher than that for ZnS and ZnO. Enhancement in these optical properties explains that the mixed (nanocomposite) quantum dots are expected to be more useful in fabricating opto-electonic devices such as solar cells, infrared windows, sensors and displays. Also, they are expected to be used in integrated optic devices such as switches, filters, optical testers, etc.
其他摘要	摘要采用Mahadevan方法制备了ZnSxO，-x [x = 0（纯ZnS），0.8,0.6,0.5,0.4,0.2和0.0（纯ZnO）]量子点，这种方法只不过是一种简单的溶剂热法。涉及家用微波炉和简单化学品的使用，进行紫外 - 可见 - 近红外吸收，光致发光（PL）和光电导（PC）测量，以了解制备的量子点的光学性质。所有量子点的紫外吸收边缘显示蓝移并且在310-350范围内下降，除了约370转的ZnO。此外，ZnSo.sOo.s表现出最小值.PL光谱在408,446,486附近有五个突出的峰（两个峰耦合）， 490和530表明清楚地表明混合量子点（纳米复合材料）与端部构件（ZnS和ZnO）相比具有非常高的PL产率。类似地，对于混合量子点观察到的光电流增益高于ZnS和ZnO。这些光学特性的增强解释了混合（na nocomposite）量子点预计在制造光电子器件如太阳能电池，红外窗口，传感器和显示器时更有用。此外，它们还可用于集成光学器件，如开关，滤光片，光学测试仪等。
主权项	-
申请日期	2017-02-07
专利号	IN201741004351A
专利状态	未确认
申请号	IN201741004351
公开（公告）号	IN201741004351A
IPC 分类号	B82Y20/00 \| H01S5/341 \| H01S3/169 \| H01S5/10
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/57550
专题	半导体激光器专利数据库
作者单位	DR.G.JANITA CHRISTOBEL
推荐引用方式 GB/T 7714	DR.G.JANITA CHRISTOBEL,,DR.C.K. MAHADEVAN. Enhanced optical properties of zns-zno (nanocomposite) quantum dots prepared by a cost-effective method for optolectronic devices. IN201741004351A[P]. 2018-08-10.