設施農業：節能栽培與滅菌【國立暨南國際大學應用材料及光電工程學系/國立中興大學材料科學與工程學系/武東星 校長/客座教授】
| 論文篇名 | 英文：The role of laser ablated backside contact pattern in efficiency improvement of mono crystalline silicon PERC solar cells 中文：雷射燒蝕背面接觸圖案在單晶矽PERC太陽能電池效率提升中的作用 |
| 期刊名稱 | Solar Energy |
| 發表年份,卷數,起迄頁數 | 2020, 196,462-467 |
| 作者 | Chiu, Jih-Sheng; Zhao, Yi-Man; Zhang, Sam; Wuu, Dong-Sing(武東星)* |
| DOI | 10.1016/j.solener.2019.12.044 |
| 中文摘要 | 發射極和背面鈍化電池（PERC）具有減少背面複合和提高背面反射率的優點，被廣泛應用于單晶和多晶矽太陽能電池中。在這項研究中，我們使用 156.75 mm × 156.75 mm p 型直拉單晶矽晶片研究了具有各種接觸圖案（I 型至 VI 型）和線間距（800-1000 µm）的背面 PERC 結構。PERC 結構背面觸點上的空隙形成在影響轉換效率方面發揮了重要作用。較小的雷射燒蝕開口寬度可能容易導致在絲網印刷和共燒背面鋁下形成空隙。來自電致發光 (EL) 測量的進一步證據證實，較高的鐳射燒蝕功率會導致背面觸點開口寬度大於 45 µm 的太陽能電池產生略微暗的區域。由於其出色的鋁背面場，線間距為 900 µm 的 III 型背面接觸圖案（虛線 2:1）超過了所有其他接觸圖案。因此，通過優化 PERC 太陽能電池的背面接觸圖案和線間距，平均 PERC 太陽能電池實現了 22.25% 和 20.9% 的最佳轉換效率。 |
| 英文摘要 | The passivated emitter and rear cell (PERC), with advantages of reducing rear surface recombination and improving rear surface reflectivity, is extensively applied in monocrystalline and multicrystalline silicon solar cells. In this study, we investigated the rear PERC structure with various contact patterns (type I to VI) and line spacings (800–1000 µm) using 156.75 mm × 156.75 mm p-type Czochralski mono crystalline silicon wafers. The void formation on the rear-side contacts of PERC structures played an important role in affecting conversion efficiencies. A smaller laser ablated opening width may easily lead to the formation of voids under screen printing and co-firing backside aluminum. Further evidence from the electroluminescence (EL) measurements confirmed that the higher laser ablation power would result in a slightly dark region for the solar cell with a rear-side contact opening width greater than 45 µm. The type III backside contact pattern (dash 2:1) with a line spacing of 900 µm surpassed all other contact patterns owing to its excellent aluminum back surface field. As a result, by optimizing both the backside contact pattern and line spacing of PERC solar cells, the best conversion efficiency of 22.25% and 20.9% for the average PERC solar cells were achieved. |
| 發表成果與本中心研究主題相關性 | 本成果提高了太陽能電池之效率，可用來提供溫室栽培之溫控能源、感測器、與UVC-LED之電能，並利用有限的空間打造出最佳性價比之農產品及能源消耗。 |
Fig. 1. A PERC structure for the mono crystalline silicon solar cell
