Preparation And Applicationin Sensitized Solar Cells Of NiO And NiO/ZnO Thin Films

Energy problem is one of the most troubling obstacle in the development of human society.The solution of energy problem will be a key leading to a great leap of the whole human's history.Since solar energy is convenient in both usage and storage,among newly discovered energy sources,it might be the most possible method to get the key which can change the world.Therefore the industry of solar cell is booming and kinds of battery material has been produced.Now days,photovoltaic industry is still full of potential especially after the Dye-sensitised cells' sappearance.Since quantum dot solar cells has the similar structure with Dye-sensitised cells,meanwhile it has more transformation efficiency and more various quantum dots,it has rapidly become the most popular study object which draws attention of scientific research fans.The photoelectrode of solar cell is required to have high quality of light quality,high electric conductivity,wide band gap.It is normally constituted by nano oxide semiconductor film,such as titanium dioxide,selenium dioxide.They are all good n-type optical electrode materials.However,comparing with n-type nano oxide semiconductor film,p-type nano oxide semiconductor film is barely used in research.Hence,It is very important to have a closer research on p-type nano oxide semiconductor film.Nickel oxide is one of the most representative material of p-type nano oxide semiconductor thin film.It has band gap that 3.6 to 4.0eV and impressive transmission of light.There will be a deep research of the solar cells that use nickel oxide photocathode in this article.The summary of this research is written as follows:In the first part,the article summarizes the types of solar cells in current years and their state of development.The emphasis of this part is to introduce the structure of quantum dots sensitized solar cell and how it works.Also the comments of quantum dots sensitized solar cell's parameter will be mentioned in this part.At the end of the first part basic information of nickel oxide p-type nano oxide semiconductor film will be introduced.The second part is the main body of this article.In this part the progress of the experiment will be shown in detail.Our researchers try to change the properties of the nickel oxide with Li-doped.Under the mature technique of sol gel process preparing nickel oxide and the previous experience of preparation of photocathode film,in the process of preparing colloid lithium doping elements,after after coating and turned back,got a stable performance,good crystalline of different doping concentration of porous nanometer nickel oxide thin films.Doped nickel oxide thin films for characterization of SEM,XRD,XPS depth,determine the experiment of mixed structure and different doping concentration on the crystal structure,the binding energy of the film.The Hall measurement study of Li-doped filmsindicated an increased order of conductivity with doping so alsothe electron density that shows resistivity(?),carrier mobility(?),and carrier concentration(n)of L-NiO films as a function of Li concentration.In the third part,the article closely studies every parameter of the cells which made by Li-doped nickel oxide film was investigated as a solar cell performance indicators of the photocathode.With thermal injection method out of the first good dispersibility,size small cadmium selenide CdSe quantum dots,using infrared optical dividing meter characterization of the uv absorption spectrum,reoccupy cadmium selenide CdSe quantum dots as a sensitizer,sensitized different doping concentration of nickel oxide nanofilms,assemble the battery samples I-V and IPCE after test.Comparison of samples with different doping concentration of the battery open circuit voltage,short circuit current and the conversion efficiency,absorption spectrum and quantum conversion efficiency,it is concluded that: solar cells indicators of doped lithium battery samples to higher than the battery samples without doping,the doping concentration of 0.5% best performance,short circuit current density increased 1.11 milliampere per cubic centimeter.That use lithium doped improve the performance of nickel oxide photocathode solar cell research method is feasible.Finally,using the most economic and convenient hydrothermal prepared the crystalline quite good ZnO nanorods,can control time to precisely control the length of the nanorods,realize the length of zno nanorods from 0.4 um and 2.7 um choose measurement control.In the processing of nickel chloride,to the modification of ZnO nanorods,obtained the NiO nickel oxide and zinc oxide compound ZnO nanorods.An electron spectroscopy using scanning electron microscopy,SEM and EDS composite nanorods for the microstructure and the element content analysis,determine the preparation of NiO nickel oxide and zinc oxide compoundZnOnanorods layered structure and the element content of eachlayer.