探討溼熱環境對三接面太陽能電池的 特性影響

Influence of Damp Heat on the Electrical Properties of Triple Junction Solar Cell

楊凱翔(Kai-Hsiang Yang)

指導教授 ： 溫武義

中原大學/工學院/電子工程研究所/碩士(2014年)

https://doi.org/10.6840/cycu201400264

摘要

本實驗主要探討Ⅲ-Ⅴ三接面太陽能電池InGaP/InGaAs/Ge在濕熱環境下的特性變化。我們實驗條件設定為85℃,相對溼度85％。實驗總共進行1100個小時。實驗分為兩個階段,第一階段為0~500個小時，第二階段為500~1100個小時。在第一部分為每一百個小時將電池從恆溫恆濕試驗機取出量測特性後再放回恆溫恆濕試驗機累積時數;第二部分則為每兩百個小時將電池從恆溫恆濕試驗機取出量測特性後再放回恆溫恆濕試驗機累積時數。
實驗後發現未封光學膠的電池效率衰退的幅度比封光學膠的電池來得大。原因在於我們在未封光學膠的電池邊緣發現破裂使得Ge暴露在溼熱環境之中,形成氧化物GeOx,並且分布在電池的表面,造成電池局部性的短路,漏電流增加,最後使得轉化效率嚴重的衰退。另外我們發現到溼熱環境造成短路電流下降對於封光學膠及未封光學膠的機制不同。對於未封光學膠太陽能電池而言,短路電流下降原因為溼熱會破壞太陽能電池的結構,使得太陽能電池串聯電阻增加;而對於封光學膠的太陽能電池來說,水氣會和光學膠反應,在光學膠表面產生雜質,造成入射光減少,使得短路電流下降。

關鍵字

III-V三接面太陽能電池 ； 濕熱測試 ； 光學膠

並列摘要

The purpose of this paper is to study the effect of damp heat test on the III-V InGaP/InGaAs/Ge triple-junction solar cells. In this paper, an accelerated test is performed on sealed and non-sealed cells in a simulated chamber with high temperature and high humidity. The test is divided into two stages. Stage one focuses on measuring electrical characteristics at one hundred-hour intervals between 0 and 500 hours; stage two focuses on measuring electrical characteristics at two hundred-hour intervals between 500 and 1100 hours.
After the test, it is found that the energy conversion efficiency of the non-sealed cells decreases more greatly than the sealed cells. The root cause is that a crack occur near the edge of the non-sealed solar cells. Germanium absorbs moisture and is oxidized into GeOx which distributed at the surface of non-sealed solar cell. This causes the increase in the leakage current and the decrease in open-circuit voltage, thus contributing to degradation of energy conversion efficiency.

並列關鍵字

III-V triple junction solar cells ； optical silicone layer ； damp heat

參考文獻

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