技術簡介
穿隧氧化鈍化接觸(Tunnel oxide passivated contact, TOPCon)是一種基於載子選擇性原理來降低表面復合的技術,而雙面鈍化接觸 (Bifacial passivated contact, biPC) 太陽電池更進一步將TOPCon技術應用於電池正反兩面,理論效率高達28.7%,更接近晶體矽太陽能電池理論極限效率的29.43%。然而,在太陽電池正面上使用摻雜多晶矽時,將導致較大的吸收損耗。因此目前實現雙面鈍化接觸的方式有二種,第一種是F-biPC (Full-type biPC),將正面多晶矽的厚度減薄或藉由透光度更好的寬能隙鈍化接觸材料來降低吸收損耗;另一種是L-biPC (Local-type biPC),將正面電極下方使用多晶矽來製作局部鈍化接觸來提高鈍化效果。
Abstract
Tunnel oxide passivated contact (TOPCon) is a technology based on the principle of carrier selectivity to reduce recombination. Bifacial passivated contact (biPC) solar cells further apply TOPCon technology to both sides (front side and rear side) of the solar cell and achieve a theoretical efficiency of 28.7%, which is closer to the theoretical limit efficiency of 29.43% for crystalline silicon solar cells. However, the use of doped polysilicon on the front side of biPC solar cell will lead to a higher absorption loss. There are two structures to solve the problem of light absorption, the first one is F-biPC (Full-type biPC), where the thickness of the polysilicon on the front side is thinned or a wide bandgap material with better transmittance is used to reduce absorption losses. The other is L-biPC (Local-type biPC), where polysilicon is used below the front electrode to form a local passivated contact area to improve the passivation property.
技術規格
採用異位摻雜製程(ex-situ)來進行F-biPC正面SiCx之摻雜製程,相較於原位摻雜(in-situ),能夠減少為了達到低電阻值過量摻雜而導致的缺陷,既能保證鈍化效果,又能滿足金屬化的需求。最終電池Voc=707 mV,Jsc=41.1 mA/cm2,效率=24.05%。
Technical Specification
By adopting the ex-situ doping process for the front SiCx of F-biPC, as opposed to in-situ doping, it is possible to reduce defects caused by excessive doping to achieve low resistance, while ensuring passivation effects and meeting metallization requirements. The cell has a Voc of 707 mV, Jsc of 41.1 mA/cm², and an efficiency of 24.05%."
技術特色
1.內容包含完整的太陽電池製作而非只有部分步驟。
2.技術可應用於PERx及TOPCon等鈍化改良太陽能電池,以及未來Tandem堆疊型電池之矽基下電池。
3.結構及理論計算可以作n型太陽能電池及p型太陽能電池。
應用範圍
光電、半導體,能源等相關產業
接受技術者具備基礎建議(設備)
太陽能電池製造廠及相關製程設備廠
接受技術者具備基礎建議(專業)
太陽光電電池原理及製程知識
聯絡資訊
聯絡人:張瀚丞 太陽光電技術組
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