CH₃NH₃PbI₃ Perovskite Quantum Dots Integrated In Luminescent Solar Concentrators

The work focused on the synthesis of CH3NH3PbI3 perovskite quantum dots by ligand-assisted reprecipitation technology,which were used as a luminescent material in LSCs whose weak absorption was studied.The article consists of three chapters:the chapter one begins with the literature review;the chapter two focuses on the preparation and characterization of CH3NH3PbI3 perovskite quantum dot LSCs;the chapter three is about the spectral and photovoltaic performance analysis of CH3NH3Pbl3 perovskite quantum dot LSCs.The chapter one explores the research background and progress of LSCs all of the world.First of all,the solar energy as a kind of abundant renewable energy is considered to be one of the effective methods for settling energy crisis.Secondly,the principle of operation,design consideration and fabrication technology of the solar cell are described in detail.Then the development course and working principle of LSCs are introduced.In the fourth part,the advantages of quantum dot fluorescent materials in LSCs are introduced systematically,including size-tunable absorption/emission spectra,broad absorption spectrum and better photostability compared with traditional organic dyes.The last part illustrates the research proposal of this paper.The chapter two describes the fabrication and characterization of CH3NH3PbI3 perovskite quantum dots LSCs.First of all,we introduces the concept and characteristics of perovskite quantum dots.The development in the application of LSCs also was studied.Secondly,we used CH3NH3PbI3 perovskite quantum dot material as a fluorescent dye.Then phase analysis and optical properties of CH3NH3PbI3 perovskite quantum dot LSCs were characterized by high-resolution transmission electron microscopy,X-ray diffraction and UV-visible infrared spectrophotometer.Finally,S3000_vis fiber spectrometer was used to measure edge emission spectroscopy to characterize the weak self-absorption properties of LSCs.Under AM 1.5 illumination using a solar simulator(Oriel Sol 3A),the photovoltaic parameters of LSC were obtained through Keithley 2400 Source Meter.In chapter three,result and discussion of LSCs were presented.The first optimization was operated by controlling the process of synthesis to get CH3NH3PbI3 quantum dots whose absorption and emission spectra were tuned to minimize the overlap,thus reducing self-absorption losses or mitigating its effects in waveguide transmission.Finally,the prototype LSC based on the perovskite CH3NH3PbI3 QDs exhibited a high optical efficiency of 24.5%from our case,which was closely correlated with the extremely small self-absorption.