銅銦鎵硒太陽能模組電池之串聯電阻量測方法設計與分析應用

Design and characterization of series resistance measurement technology for CIGS module cell and its applications

李昱德(Yu-Te Li)

指導教授 ： 甘炯耀

國立清華大學/工學院/材料科學工程學系/碩士(2020年)

摘要

串聯電阻對薄膜類型的太陽能電池電性來說是不能忽視的一環，而串聯電阻的分析需要利用許多種的模型來進行計算，故我們分成三個部份來解析串聯電阻。
第一部分是M-TLM模型，文獻中提到此方法可以利用模組電池就能量測到P2區域的接觸電阻，不用刻意設計其他結構即能量測，但由於此方法對CIGS的寬度沒有做出限制且沒有解決寄生電阻在量測中如何去除，所以我們利用推導論證出若要使用此結構需要有一定的條件，以此來獲得正確的TCO片電阻與P2接觸電阻。
第二部分是解構CIGS電池的串聯電阻，利用Matlab擬合軟體來進行IV擬合得到Voc、Jsc、FF、Efficiency、Rs、Rsh...等等參數，再經由分析串聯電阻，將之前所述之TCO、Mo片電阻與P2接觸電阻之貢獻扣除，我們便能得到剩餘與電池面積這項因素無關之串聯電阻有多少貢獻。
第三部分是光浸潤效應對電池優化後各參數的解構。許多PV模組的效率會因為照光而讓整個電池模組有所改善，這個現象便被稱之為光浸潤效應(Light Soaking Effect)。我們可以利用前面的方法來分析進行光浸潤之後，其對參數的影響，還能分析各部位電阻對應光浸潤效應是否有所變化。
建立了此量測方法之後，對CIGS太陽能電池進行任何實驗都能利用此法來分析實驗對電池各處電阻所造成之影響。

關鍵字

銅銦鎵硒太陽能電池 ； 串聯電阻 ； P2接觸電組 ； TCO片電阻 ； 其他部位剩餘電阻

並列摘要

The series resistance is a part that cannot be ignored for the electrical properties of CIGS thin-film solar cells, and the analysis of series resistance requires the calculation of many models, so we divide it into three parts to analyze the series resistance.
The first part is the M-TLM model. It is mentioned in the literature that this method can use the solar cell module to measure the contact resistance in the P2 region without designing other structures. However, this method does not limit the width of CIGS and does not solve how to remove the parasitic resistance in the measurement, we use derivation to demonstrate that certain conditions are required to use this structure, in order to obtain the correct TCO sheet resistance and P2 contact resistance.
The second part is to deconstruct the series resistance of the CIGS module cell. We utilize Matlab fitting software to fit the light current of CIGS, obtain Voc, Jsc, FF, Efficiency, Rs, Rsh...etc. Then we analyze the series resistance. Subtracting the contribution of the TCO, Mo sheet resistance and P2 contact resistance mentioned above, we can get the contribution of the remaining series resistance that is not related to the factor of battery area.
The third part is the deconstruction of the optimized parameters of CIGS by light soaking effect. The efficiency of many PV modules will be improved by illumination. This phenomenon is called the Light Soaking Effect. We can use the previous method to analyze the effect of light soaking on the parameters, and also analyze whether the resistance of each part has changed according to the light soaking effect.
After establishing this measuring method, any experiment on CIGS solar cells can use this method to analyze the change of the resistance of the experiment.

並列關鍵字

CIGS Solar cell ； Series resistance ； P2 contact resistance ； TCO sheet resistance ； Residual resistance

參考文獻

[1] I. r. e. agency, "Global levelized cost of electricity from utility-scale renewable power generation technology 2010-2017," 2018.

[2] 太陽能電池分類. Available: https://sites.google.com/site/ensatptd/tai-yang-guang-dian-fa-dian

[3] NREL. Best Research-Cell Efficiency Chart. Available: https://www.nrel.gov/pv/cell-efficiency.html

[4] T. Kato, "Recent research progress of high-efficiency CIGS solar cell in solar frontier," in 7th International Workshop on CIGS Solar Cell Technology (IW-CIGSTech 7) 32nd EU PVSEC, 2016.

[5] TEP. (2018). Introduction to PN Junction. Available: https://www.theengineeringprojects.com/2018/05/introduction-to-pn-junction.html