石墨烯复合紫外探测器制备及性能
毕业论文关键词 石墨烯 纳米晶 氧化锆 油相法 XRD TEM 荧光光谱 光响应
Title The Preparation and Optoelectronic Characterizations of theGraphene hybrid ultraviolet photodetector
Abstract Graphene is an appealing material for optoelectronics because it offers severaladvantages compared with other materials，such as wide wavelength range andultrafast conversion of photos to electrical signals. Its weak light absorption can beenhanced by combination of low conductivity nanoparticles as sensitizing centres thatabsorb light efficiently. In this paper, hybrid photodetector is realized usingnanostructured zirconia QDs as light-absorbing media and high mobility of graphene.This hybrid photodetector is potential for the photovoltaic devices， photo catalysis andsolar cells.In this paper, nano zirconia is mainly prepared in organic solution includingzirconium acetyl acetone 1-octadecene and dodecanol. And then transfer graphene tothe substrate chip. The substrate plated the electronic circuit by vaccum depositionmethod can be finally assembled into ultraviolet photodector by spin-coatingnanocrystalline particles on it. XRD spectra verified that these samples are ofzirconia.TEM diagrams of the samples showed that the sizes of particles are about3-4nm. Its perfect absorption of ultraviolet light was confirmed by U.V. curve and PLspectra. Nano zirconia deposited by spin-coating. The relative high ultraviolet light’sresponsivity of Hybrid photodetector which decorated with ZrO2 QDs was verified bythe I-V curve and responsivity(A/W) diagram.
Keywords ：graphene nanocrystalline zirconia anhydrous synthesisXRD TEM PL spectra responsivity of a photodetector
目次
1引言.1
1.1石墨烯概述..1
1.1.1石墨烯发展历程..1
1.1.2石墨烯性能与结构...2
1.1.3石墨烯的制法.3
1.1.3.1机械剥离法4
1.1.3.2还原氧化法或rGO法....4
1.1.3.3外延生长法5
1.1.3.4化学气相沉积法..5
1.1.3.5解链碳纳米管法..6
1.2氧化锆概述8
1.2.1氧化锆的性能.8
1.2.2氧化锆的制法.9
1.3石墨烯复合光电探测器概述10
1.3.1光电探测器...10
1.3.2石墨烯基光电探测器..10
1.3.3.1金属-石墨烯-金属光电探测器...11
1.3.3.2石墨烯半导体异质结光电探测器....12
1.3.3.3石墨烯基热辐射探测器.12
1.3.3.4复合型光电晶体管....12
1.3.3.5太赫光电探测器...13
1.4研究目的及研究内容..13
2光电探测器的制备14
2.1纳米氧化锆的制备...14
2.2石墨烯的转移与光电器件的制备....15
3光电探测器的性能表征..17
3.1纳米氧化锆的检测与分析.17
3.2X射线衍射分析...17