本論文，在傳統銅銦鎵硒(CIGS)薄膜太陽能電池架構中分別在CIGS吸收層的下方和上方添加一層磷化銦鎵作為輔助吸收層。使傳統ZnO / CdS / CIGS / Mo成為ZnO / CdS / CIGS / InGaP / Mo和ZnO / CdS / InGaP / CIGS / Mo的架構，以提升光被吸收的機會。並分別調變輔助吸收層的厚度、鎵的比例和摻雜濃度做比較以尋找最佳參數。實驗結果發現，當使用最佳參數的輔助吸收層在CIGS下方時，在光波長600 nm ~ 1200 nm的外部量子效率有增加的趨勢。與傳統架構相比，在短路電流密度上增加了約9 ％，同時轉換效率也增加了9 ％；然而，當最佳參數的輔助吸收層在CIGS吸收層上方時，在光波長300 nm ~ 600 nm的外部量子效率有增加的趨勢。與傳統架構相比，在短路電流密度上增加了約7.7 ％，開路電壓增加了約7.1 ％，同時轉換效率也增加20.6 ％。這表示當輔助吸收層在下方時則可以讓在吸收層未被吸收的光有再次被吸收的機會；然而，當輔助吸收層在吸收層上方時可以先吸收能量較大的光，減少吸收層的熱損失，達到提升轉換效率的效果。

In this study, we add an additional layer above and under the CIGS absorber layer as a secondary absorption layer respectively. We made the conventional structure of ZnO/CdS/CIGS/Mo becomes the structure of ZnO/CdS/CIGS/InGaP/Mo and ZnO/CdS/InGaP/CIGS/Mo which can improve the conversion efficiency. And we translate the thickness proportion of Ga and the doping concentration to find out the best parameter. According to the simulation, the wavelength of EQE in 600 nm ~ 1200 nm for our proposed CIGS solar cell which the additional layer under CIGS layer has been improved when compared to the conventional CIGS solar cell. The short-circuit current density has been increased about 9 %. And the conversion efficiency has also been increased about 9 %.When the additional layer above the CIGS absorber layer, according to the simulation, the wavelength of EQE in 300 nm ~ 600 nm for our proposed CIGS solar cell is improved when compared with the conventional CIGS solar cell. The short-circuit current density has been improved about 7.7 %, the open-circuit voltage about 7.1 %, and the conversion efficiency about 20.6 %. The main reason is that when the InGaP absorption layer under the CIGS layer which can catch the light which can’t be absorbed by CIGS layer. The InGaP absorption layer above the CIGS layer which can catch the light immediately.

第一章、導論 1
1.1背景 1
1.1.1各種半導體材料太陽能電池概論 2
1.2動機 6
1.2.1抗反射層及透明導電膜 7
1.2.2緩衝層 8
1.2.3吸收層 9
1.2.4背電極 12
1.2.5額外增加的功能性架構 12
第二章、太陽能電池物理機制與基本運作原理 15
2.1.1光在能帶中的行為 15
2.1.2光學光譜 17
2.2.1太陽能電池的運作原理 18
2.2.2太陽能電池基本電性與效率 19
2.2.3太陽能電池的基本光學特性 21
2.3.1疊接的基本概念與限制 22
2.4.1表面粗糙化 24
2.4.2球形太陽能電池 25
第三章、以磷化銦鎵為銅銦鎵硒太陽能電池的輔助吸收層之製程 26
3.1.1銅銦硒的材料特性 26
3.1.2銅銦硒的光學特性 27
3.1.3磷化銦鎵的特性 28
3.1.4輔助吸收層CIGS太陽能電池架構 31
第四章、結果與討論 35
4.1原件模擬之物理模型與參數 35
4.2傳統架構與下方輔助吸收層改良之分析 36
4.2.1下方輔助吸收層厚度調變 37
4.2.2下方輔助吸收層鎵的化學組成比例調變 40
4.2.3下方輔助吸收層摻雜濃度調變 43
4.2.4下方輔助吸收層改良架構與傳統架構之比較 45
4.3傳統架構與上方輔助吸收層改良之分析 48
4.3.1上方輔助吸收層厚度調變 49
4.3.2上方輔助吸收層鎵的化學組成比例調變 52
4.3.3上方輔助吸收層摻雜濃度調變 56
4.3.4上方輔助吸收層改良架構與傳統架構之比較 59
結論 62
第五章、未來展望 63
參考文獻 64

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