| 研究生: |
郭咨妤 Kuo, Tzu-Yu |
|---|---|
| 論文名稱: |
銅銦鎵二硒太陽能電池緩衝層材料之研究 Studies of Buffer Layer Materials for CuIn1-xGaxSe2 Solar Cells |
| 指導教授: |
彭洞清
Perng, Dung-Ching |
| 學位類別: |
碩士 Master |
| 系所名稱: |
電機資訊學院 - 微電子工程研究所 Institute of Microelectronics |
| 論文出版年: | 2013 |
| 畢業學年度: | 101 |
| 語文別: | 中文 |
| 論文頁數: | 111 |
| 中文關鍵詞: | 薄膜太陽能電池 、含鈉玻璃基板 、銅銦鎵二硒 、硒化法 、溴水蝕刻 、緩衝層 |
| 外文關鍵詞: | Thin film solar cells, Soda-Lime Glass (SLG), CuIn1-xGaxSe2 (CIGS), selenization, Br2 etch, buffer layer |
| 相關次數: | 點閱:98 下載:2 |
| 分享至: |
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本論文以銅─銦─鎵先驅物濺鍍於鉬背電極之含鈉玻璃基板,經由高溫硒化形成銅銦鎵二硒之吸收層薄膜,然後比較吸收層薄膜經過不同蝕刻製程、不同緩衝層以及不同絕緣層厚度之薄膜太陽能電池元件的光電轉換效率差異。
於實驗中發現溴水蝕刻製程的時間、緩衝層材料的差異(硫化鎘與硫化鋅)、緩衝層厚度(硫化鎘)與絕緣層製程差異(氧化鋅)皆會影響元件的開路電壓、短路電流、填充係數、串並聯電阻以及其效率。本實驗透過掃描式電子顯微鏡(SEM)、能量分散光譜儀(EDX)、X光繞射分析儀(XRD)、薄膜測厚儀(Alpha Step)對薄膜進行表面形貌、組成成分、晶體結構與薄膜厚度進行分析,最後以太陽光模擬與I-V量測系統量測其光電轉換效率並比較不同製程之元件差異。
最後以溴水蝕刻60秒,並且以100nm硫化鎘為緩衝層、70nm氧化鋅絕緣層之製程成功做出本實驗最高光電轉換效率的薄膜太陽能電池,由電流電壓特性曲線顯示其具顯著之二極體特性,量測數據:Voc=270mV、Jsc=36.45mA/cm2、F.F.=38.59%、η=3.8%。
In this dissertation, we used sputtered Copper-Indium-Gallium metallic precursors on Mo-coated Soda-Lime Glass (SLG) substrates. High temperature selenization process was used to form CuIn1-xGaxSe2 (CIGS) absorber layer. The conversion efficiencies of the CIGS solar cells are compared with various etching process for absorber films, different buffer layers, and various thickness of insulator layers.
The study found that the etch time (Br2) on CIGS film, different buffer layer (CdS/ ZnS) materials, and the thickness insulator layer (i-ZnO) have significant influence on Voc, Jsc, fill factor, series and shunt resistance, and cell efficiency. The study used scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Alpha Step to analysis the morphology, element composition, crystalline phase/orientation, and thickness of the film. At last, solar simulator and I-V measurements were used to measure the conversion efficient of the devices with different processes, buffer layers, and thickness of films.
The highest efficiency of CIGS solar cell was fabricated with 60s Br2 etch, 100 nm CdS buffer layer and 70nm i-ZnO layer. The I-V measurement results indicate this device has remarkable diode chacteristics with following photovoltaic parameters : Voc=270mV、Jsc=36.45mA/cm2、F.F.=38.59%、η=3.8%。
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