Study On Single-Crystal Silicon Solar Cell With High Efficiency And Low Cost And Its Software Realization Of Uniform Design

The future for the development of the solar cell is to further improve the efficiency and lower the cost. At present, the efficiency of the high-efficient single-crystal solar cell made in laboratory has been close to 25% and the extra scale is already limited. Therefore, the next emphasis should be paid on the low cost and industrialization. The urgent problem is how to simplify the process of the high-efficient single-crystal solar cell in laboratories and apply to industrial production. According the idea, the paper studies the production technology of the mechanically grooved buried contact single-crystal solar cell and the method of software realization on its parameters design.The paper is taken into two parts according to the content. The first part studies the production technology of the mechanically grooved buried contact single-crystal solar cell. Aim at the principle of the selective emission, the oxygen, carbon and heavy metal impurity in the sun grade silicon flake has been analyzed. Then it is consider that the key production technology of single-crystal solar cell lies with the decrease of stacking fault and the process of high temperature as much as possible. So, we make the selective emission through the one step diffusion method by the countercheck effect instead of by the ordinary two step diffusion method. The time of high temperature process is greatly shortened and the damages caused by long time high temperature process diminished. The experiment proves the requirement of the device and the process in the quality and thickness of the silicon oxidation layer is well met. The full aluminum back surface field is adopted which really improves the collecting efficiency of the carriers, lowers the the back surface recombination and improves the fill factor and the efficiency of the solar cell. Based on the proper design and the simple process, the efficiency of the mechanically grooved buried contact single-crystal solar cell on the sun grade silicon flake with 101.6mm gains 13.8%.The other part studied the the shortages of Sequential Number-Theoretic Optimization for correlating the I-V curve of solar cells, and a adaptation search algorithm is proposed in combination with the adaptation search algorithm of genetic algorithm. Computed result shows that the accelerating correlating algorithm is more easier to compute, more convergent androbustious than Sequential Number-Theoretic Optimization. Then, based on the algorithm we have proposed and the uniform design method, in combination with the MINIMOS 6.0 and the SUPREM-3, a software system on uniform design of the single-crystal silicon solar cell is realized. Manpower, material resources, time and financial ability are saved for design the solar cell, at the mean time, the possibility of gaining optimum parameters is improved because of the range the parameters can be adjusted at discretion in some scope.