International Photovoltaic Science and technology the highest level of academic journal "the latest progress of" research and application of PV Prog. Photovoltaics: Res. & Appl. 25, 280-290 (2017), IF:7.365 (the magazine is to cover the first piece of paper cover) report form the research of Shen Wenzhong Solar Energy Research Institute, Institute of physics and Astronomy Research Group in Shanghai Jiao Tong University the industrialization of high efficiency crystalline silicon solar cells by double.
N type double crystal silicon solar cells are widely favored by both academia and industry because of the characteristics of both sides. They proposed a simple double doped (BBr3 positive thermal diffusion, the back of the P ion implantation) and thin Al2O3 (~4nm) /SiNx:H (~75nm) composite film passivated emitter of p+ method, the optimal peak sintering temperature and fine screen printing, in a large area (238.95cm2) to achieve positive 20.89% and back 18.45% battery the conversion efficiency. Through the software simulation, the structure of the N type double crystal silicon solar cell can achieve 21.32% conversion efficiency under the condition of positive and reasonable square resistance.
In addition to the technical side of solar cell, another industrial high efficiency crystalline silicon Shen Wenzhong research group (BJBC) and back back contact solar cell research has been in progress "" research and application of photovoltaic Photovoltaics: Res. published online [Prog. & Appl. 2017, DOI: 10.1002/ pip.2881].
Through wet chemical, diffusion, ion implantation and annealing oxidation, laser graphics and PECVD technology, to achieve superior optical surface in cell precursors (on the average reflectance of <2.5%) and high impliedVoc (0.695V); silk screen printing and sintering, get a small area (4.04cm2) of 22.20% BJBC solar cell conversion efficiency; using the same process, get the larger size (6? 6cm2) conversion efficiency of 21.43%. The research shows that the preparation of the BJBC crystalline silicon solar cell is compatible with the traditional industrial equipment, and has a good application prospect.
These two results are completed with the listed companies of Shanghai Aerospace Automobile Electromechanical Limited by Share Ltd, technology has made good progress in the production line of enterprise of high efficiency crystalline silicon solar cell, has the prospect of industrial application.