n(Bi2O3)/n(SiO2)对Bi2O3-B2O3-SiO2系光伏玻璃背板油墨微观结构和反射率的影响

摘要/Abstract

摘要： 随着光伏发射极和背面钝化电池双面双玻组件产业的兴起,光伏玻璃背板用光伏油墨的需求量逐年递增。光伏油墨制备成涂层后,其致密程度将直接影响自身的反射率,进而对光伏电池的光电转化效率产生影响。本文通过改变n(Bi₂O₃)/n(SiO₂),探究玻璃熔剂析晶和其对Bi₂O₃-B₂O₃-SiO₂系玻璃熔剂所制备光伏油墨的影响。采用DSC和Raman对玻璃熔剂的特征行为进行了表征,采用XRD、SEM、色度仪对不同光伏油墨涂层的微观结构和反射率进行了研究,并提出了光伏油墨涂层的光反射增强机制。研究表明, n(Bi₂O₃)/n(SiO₂)的升高会使[BiO₃]和[BiO₆]基团含量增多,破坏[SiO₄]玻璃网络的能力增强,玻璃熔剂的转变温度和析晶峰温度逐渐降低,玻璃熔剂的析晶能力逐渐增大。在短时间内烤制后的玻璃熔剂涂层中会逐渐析出大量的片状Bi₂SiO₅晶粒,将其制备成光伏油墨涂层后,涂层的反射率会随着n(Bi₂O₃)/n(SiO₂)的升高而逐渐升高。当n(Bi₂O₃)/n(SiO₂)为30∶60时,光伏油墨涂层的反射率在近红外波长范围内可提升到82.66%。这主要是因为油墨涂层中的孔隙和空洞作为异相界面,可促使Bi₂SiO₅晶粒析出并填充在光伏油墨涂层的孔隙和空洞中,使油墨涂层的致密度提高,从而增强光伏油墨涂层对光线的反射能力。

关键词: Bi₂O₃-B₂O₃-SiO₂系光伏玻璃背板油墨, 反射率, n(Bi₂O₃)/n(SiO₂), 微观结构, 析晶

Abstract: With the rise of passivated emitter and rear cell double-sided glass components industries,the need for photovoltaic ink for photovoltaic glass backsheet is growing annually. After the photovoltaic ink is prepared for the coating, the degree of its density will have a direct impact on the reflectivity of photovoltaic ink coating and conversion efficiency ulteriorly of photovoltaic cell. By changing the n(Bi₂O₃)/n(SiO₂), the crystallization of glass flux and its effect on the photovoltaic ink prepared by Bi₂O₃-B₂O₃-SiO₂ glass flux were investigated. The different characteristics of glass flux were analyzed by using DSC and Raman. The microstructure and reflectance of various photovoltaic ink coating were studied by using XRD and SEM, and the mechanism for the enhancement of light reflection was proposed. The results show that the increase of n(Bi₂O₃)/n(SiO₂) leads to an increase in [BiO₃] and [BiO₆] ionic groups. Thus, the destruction ability of the [SiO₄] glass network is enhanced, and the transition temperature and crystallization peak temperature of glass flux gradually decrease. The crystallization ability of glass flux gradually increases. A large number of flaky Bi₂SiO₅ crystals are gradually precipitated from photovoltaic ink coating in a short period of time. After preparing them as photovoltaic ink coating, the reflectivity of the coating gradually increases with the elevation of n(Bi₂O₃)/n(SiO₂). With n(Bi₂O₃)/n(SiO₂) of 30∶60, the reflectance of photovoltaic ink coating can be enhanced to 82.66% in the near-infrared wavelength range. This is mainly due to the fact that the pores and cavities in photovoltaic ink coating act as heterogeneous interfaces, prompting the precipitation of Bi₂SiO₅ crystals and filling them into the pores and cavities of photovoltaic ink coating, resulting in an increase in the densification of photovoltaic ink coating and thus an enhancement of the reflective ability of photovoltaic ink coating to light.

Key words: Bi₂O₃-B₂O₃-SiO₂ system photovoltaic glass backplane ink, reflectivity, n(Bi₂O₃)/n(SiO₂), microstructure, crystallization

中图分类号:

TQ171

汪伟, 赵田贵, 孟子豪, 刘溧, 董伟霞, 徐和良, 包启富. n(Bi₂O₃)/n(SiO₂)对Bi₂O₃-B₂O₃-SiO₂系光伏玻璃背板油墨微观结构和反射率的影响[J]. 硅酸盐通报, 2024, 43(2): 702-709.

WANG Wei, ZHAO Tiangui, MENG Zihao, LIU Li, DONG Weixia, XU Heliang, BAO Qifu. Effect of n(Bi₂O₃)/n(SiO₂) on Microstructure and Reflectivity of Bi₂O₃-B₂O₃-SiO₂ System Photovoltaic Glass Backplane Inks[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 702-709.

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n(Bi₂O₃)/n(SiO₂)对Bi₂O₃-B₂O₃-SiO₂系光伏玻璃背板油墨微观结构和反射率的影响

Effect of n(Bi₂O₃)/n(SiO₂) on Microstructure and Reflectivity of Bi₂O₃-B₂O₃-SiO₂ System Photovoltaic Glass Backplane Inks

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