Polyvinyl Chloride-Based Luminescent Downshifting Film with High Flame Retardancy and Excellent UV Resistance for Silicon Solar Cells
writer：Shuang Qiu
keywords：fame retardant, luminescent downshifting layer, polyvinyl chloride, solar energy, UV-resistance
source：期刊
Issue time：2024年
Solar power generation, as a clean energy source, has significant potential for development. This work reports the recent efforts to address the challenge of low power conversion efficiency in photovoltaic devices by proposing the fabrication of a luminescence downshifting layer using polyvinyl chloride (PVC) with added fluorescent dots to enhance light utilization. A photoluminescent microsphere (HCPAM) is synthesized by cross‐linking hexachlorocyclotriphosphazene, 2‐iminobenzimidazoline, and polyethyleneimine. Low addition of HCPAM can improve the fire safety of PVC films, raising the limiting oxygen index of PVC to 32.4% and reducing the total heat release and smoke production rate values by 14.5% and 42.9%, respectively. Additionally, modified PVC film remains a transparency of 88% and shows down‐conversion light properties. When the PVC+1%HCPAM film is applied to the solar cell, the short‐circuit current density increases from 42.3 to 43.8 mA cm?2,resulting in a 7.0% enhancement in power conversion efficiency. HCPAM also effectively delays the photooxidative aging of PVC, particularly at a 3% content, maintaining the surface morphology and optical properties of PVC samples during ultraviolet aging. This study offers an innovative strategy to enhance the fire and UV‐resistant performance of PVC films and expand their applications in protecting and efficiently utilizing photovoltaic devices.
太陽能發電作為清潔能源，具有巨大的發展潛力。這項工作報告了最近為解決光伏器件中低功率轉換效率的挑戰所做的努力，提出使用添加熒光點的聚氯乙烯（PVC）制造發光降頻層以提高光利用率。光致發光微球（HCPAM）是通過交聯六氯環三磷腈、2-亞氨基苯并咪唑啉和聚乙烯亞胺合成的。低添加量的HCPAM可提高PVC薄膜的防火安全性，使PVC的極限氧指數提高至32.4%，總放熱量和產煙率值分別降低14.5%和42.9%。此外，改性PVC 薄膜仍保持 88% 的透明度，并顯示出下轉換光特性。當PVC+1%HCPAM薄膜應用于太陽能電池時，短路電流密度從42.3 mA cm-2增加到43.8 mA cm ?2 ，使電源轉換效率提高7.0%。HCPAM還有效延緩PVC的光氧化老化，特別是在3%含量時，在紫外線老化過程中保持PVC樣品的表面形貌和光學性能。這項研究提供了一種創新策略，可以增強PVC 薄膜的防火和抗紫外線性能，并擴大其在保護和有效利用光伏設備方面的應用。