Development of a pH sensor based on a nanostructured filter adding pH-sensitive fluorescent dye for detecting acetic acid in photovoltaic modules
Development of a pH sensor based on a nanostructured filter adding pH-sensitive fluorescent dye for detecting acetic acid in photovoltaic modules
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DOI：
10.7567/jjap.54.08kg07
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发表时间：
2015-08-01
影响因子：
1.5
通讯作者：
Umeda, Norihiro
中科院分区：
文献类型：
--
作者：
Asaka, Takashi;Itayama, Tomohiro;Umeda, Norihiro
作为光伏（PV）模块中的密封剂的乙烯乙酸乙烯酯（伊娃）通过水解形成的乙酸通过栅格腐蚀导致这种模块的转换效率降低。在这里，提出了一种非破坏性的和简单的光学方法来评估光伏组件的条件。该方法使用双波长pH敏感的荧光染料来检测PV模块中的乙酸，使用pH的变化。由乙酸的形成引起的pH的变化通过染料的两个峰的荧光强度的比率的变化来检测。pH敏感的荧光染料显示出对少量乙酸的敏感性，例如由伊娃产生的乙酸。此外，在PV模块中进行5000小时的湿热试验（85 ℃，85%）后，确认用pH敏感性荧光染料染色的膜过滤器检测老化的伊娃中的乙酸。(C)2015日本应用物理学会
Acetic acid formed via the hydrolysis of ethylene vinyl acetate (EVA) as an encapsulant in photovoltaic (PV) modules causes a decrease in the conversion efficiency of such modules by grid corrosion. Here, a nondestructive and simple optical method for evaluating the condition of PV modules is proposed. This method uses a dual-wavelength pH-sensitive fluorescent dye to detect acetic acid in PV modules using a change in pH. The change in pH induced by the formation of acetic acid is detected by the change in the ratio of the fluorescent intensities of two peaks of the dye. A pH-sensitive fluorescent dye showed sensitivity for small amounts of acetic acid such as that produced from EVA. Furthermore, a membrane filter dyed with a pH-sensitive fluorescent dye was confirmed to detect acetic acid in aged EVA after a damp-heat test (85 degrees C, 85%) for 5000 h in PV modules. (C) 2015 The Japan Society of Applied Physics