Preparation And Properties Of CdS/Au NP/CdTe Plasmon Resonance Solar Cell

The CdS/CdTe solar cell has already been put into production, for its relativelysimple and mature manufacture technique, high cost performance, convenience forproduction in large area and other advantages. But it still has some shortcomings,such as low efficiency, instability and so on. So people are trying some newtechnologies to improve the performances of the CdS/CdTe solar cell.Localized surface plasmon resonance (LSPR) on localized surface inNanoparticles is an important optical near-field effect, which can introduce strongenhancement of the local electromagnetic field and is mostly used for biologicaldetection etc. So far the application of the surface plasmon resonance technique inthe field of solar cells has received extensive attention. When the surface plasmaresonance occurs, the light-absorption of the material is increased, providing apossible way to achieve the high efficient photoelectric conversion. So, it is a newresearch direction to apply the surface plasmon resonance technique to thin filmsolar cells for improving the light-absorption of solar cells.The current research forthis topic is mainly concentrated on theory, and the research for preparing goldnanoparticles in CdS/CdTe heterojunction solar cells to form CdS/Au NP/CdTeplasmon resonance solar cell is experimentally not reported. The main controbitionof Au nanoparticles to CdS/CdTe solar cell is to enhance the photocurrent by theinjection of hot electrons, which is important for improving the solar cellperformance, and it is significant to the development of solar cells industry.This thesis has particularly introduced CdS/Au NP/CdTe and CdS/AuNP/Porous Si plasmon resonance solar cell, and systematicly analyzed theirproperties and theory. The contents specify as follows:First, this thesis has introduced the present development situation of film solarcells and corresponding materials at home and abroad. It has also introduced theresearch status of surface plasmon resonance technology and CdS/Au NP/CdTeplasmon resonance solar cell.Second, this thesis has introduced the basic structure and working principle ofmetal nano-particle plasmon resonance solar cells and simulated the characteristicsof solar cell with AFORS-HET. It has also introduced the characteristics andpreparation methods of the nano film and nanoparticles.Third, this paper has systematicly introduced the preparation methods andprocess of CdS nano-film, gold nanoparticle, CdTe thin film, porous silicon andCdS/CdTe, CdS/Au NP/CdTe, CdS/Porous SI, CdS/Au NP/Porous SI solar cell.Fourth, this thesis has systematicly researched the effect of annealing temperature change to CdS nano-film on the absorption edge and the effect ofannealing temperature and spraying time on gold nanoparticle plasmon resonancefrequency and its related mechanism.Last，this paper has respectively studied the photoelectric characteristics ofCdS/CdTe, CdS/Au NP/CdTe, CdS/Porous SI and CdS/Au NP/Porous SI solar cellsand analyzed the effect of plasma resonance technology on solar cell performanceand its corresponding mechanism.As conclusion, the gold nanoparticles can improve the photocurrent ofCdS/CdTe and CdS/Porous Si heterojunction solar cells. The photovoltage ofCdS/CdTe and CdS/Porous Si heterojunction solar cells, which is synthesized bywet chemical method, can be comparable to theoretical simulation. But because thequality of film crystallization is bad, too many composite centers exist and thelifetime of the optical carrier is too short, its light current is relatively lower.Whatever, this paper proposes a feasible scheme to improve the performance ofplasmon resonance CdS/CdTe and CdS/Porous Si heterojunction solar cells.