多晶硅太阳能电池片SE工艺优化的研究

发布时间：2019-03-08 11:08

【摘要】：太阳能是一种清洁无污染的可再生能源,对缓解能源危机和日益严重的环境污染具有十分重要的意义。最近几年,太阳能电池的产量以前所未有的速度增长,其中多晶硅太阳能电池又占据了主要市场。常规多晶太阳能电池效率受到电池结构影响,导致在产业化生产中效率低,成本高。新型多晶硅太阳能电池结构选择性发射极(SE)的应用,对于提升转换效率和降低成本的意义重大。本文主要从以下几个方面开展研究工作： (1)对太阳能电池的基本概念进行了解后,并对多晶硅太阳能电池SE技术的原理、物理模型、结构参数和性能进行了深入研究。 (2)常规多晶硅太阳能电池结构受扩散表面浓度和结深影响：扩散要求低掺杂以减少载流子复合,但低掺杂后,接触电阻增加,难以形成良好的欧姆接触；因此限制了多晶硅太阳能电池的转换效率。选择性发射极(SE)技术在电极接触区域进行重掺杂,而在光照区域进行低掺杂,能较好的解决转换效率的问题。 (3)本文提出了一些后续选择性发射极工艺的优化和发展方向,希望进一步提升转换效率,减低制造成本,早日实现清洁能源的广泛应用。本论文通过对多晶硅太阳能电池片SE工艺优化的研究,优化了工业制程中的工艺参数,使得多晶硅太阳能电池片的光电转换效率提高约0.6%,达到17.6%;多晶硅电池片的单片生产成本下降约5%。
[Abstract]:Solar energy is a kind of clean and pollution-free renewable energy, which is of great significance to the alleviation of energy crisis and the increasing environmental pollution. In recent years, the production of solar cells has grown at an unprecedented rate, with polysilicon solar cells occupying the main market. The efficiency of the conventional polycrystalline solar cell is affected by the structure of the battery, so that the efficiency is low and the cost is high in the industrial production. The application of a new type of polycrystalline silicon solar cell structure selective emitter (SE) is of great significance for improving the conversion efficiency and reducing the cost. This paper mainly carries out the research work from the following aspects (1) After the basic concept of the solar cell is known, the principle, the physical model, the structural parameters and the performance of the polycrystalline silicon solar cell SE technology are deeply studied. in that study, (2) the conventional polycrystalline silicon solar cell structure is affected by the diffusion surface concentration and the junction depth: the diffusion requires low doping to reduce carrier recombination, but after the low doping, the contact resistance is increased, and good ohmic contact is difficult to form; therefore, the polycrystalline silicon solar cell is limited, the selective emitter (SE) technology is heavily doped in the electrode contact area, (3) The optimization and development direction of the following selective emitter process is proposed in this paper. It is hoped to further improve the conversion efficiency, reduce the manufacturing cost and realize the cleaning at an early date. In this paper, the process parameters in the industrial process are optimized by the research on the process optimization of the silicon solar cell, so that the photoelectric conversion efficiency of the polycrystalline silicon solar cell is improved by about 0.6%, reaching 17.6%, and the single-piece of the polycrystalline silicon solar cell
【学位授予单位】：中国科学院大学（工程管理与信息技术学院）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.4

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