【摘要】 用快速烧结法制备了硅太阳电池片,讨论了作为硅太阳电池高温黏结相的PbO-Al2O3-B2O3-SiO2玻璃的润湿能力对Ag/Si欧姆接触,银粉烧结和电极导电机制的影响。采用平行板黏度计测定了玻璃的黏度-温度曲线并确定了软化温度;用扫描电子显微镜对电极表面的微观结构进行了分析;通过对电流-电压特性曲线的分析得到了串联电阻、填充因子、开路电压、效率等性能数据。结果表明:玻璃的软化温度越低,电极结构越致密,说明良好的润湿能力有助于银粉烧结;玻璃的润湿能力不仅对形成Ag/Si接触的重结晶银晶粒尺寸和数量有影响,还是决定导电机制的重要因素。因此,具有适当润湿能力的玻璃粉是获得最佳电池性能的关键因素之一。更多还原

【Abstract】 PbO-Al2O3-B2O3-SiO2 glass frits were used as binders during rapid thermal processing(RTP)for manufacturing Si solar cells.The influences of the PbO-Al2O3-B2O3-SiO2 glass frit wetting property on the Ag/Si ohmic contact,sintering of Ag powder particles and conducting mechanism of the Ag grid were discussed.The softening temperatures were determined by the viscosity-temperature curves,which were measured through parallel plate viscometry.Scanning electron microscopy was used for investigating the microstructures of the surfaces of the Ag grids.The series resistance,fill factor,open circuit voltage and efficiency were determined by I-V analysis.The results show that good wetting ability can improve the sintering of Ag powders because the lower the softening temperature,the denser the structure of the Ag grid.The wetting ability affects the conducting mechanism as well as the amount and size of Ag re-crystallites,which form Ag/Si contacts.Therefore,glass frit with proper wetting ability is a key factor to obtain the best performance of solar cells.更多还原