Title

矽晶太陽電池用非氟系背板材料之開發與性質研究

Translated Titles

Novel back sheet materials on polysilicon base PV application

Authors

楊沛瑩

Key Words

背板材料

PublicationName

清華大學化學工程學系學位論文

Volume or Term/Year and Month of Publication

2013年

Academic Degree Category

碩士

Advisor

李育德

Content Language

繁體中文

Chinese Abstract

本研究致力於開發新型不含氟之背板材料,以此代替傳統 Tedlar® 薄膜當作封裝背板,希望此材料可大幅降低背板製作成本和提高安全性。背板材料需具備阻隔水氣和抗UV的能力,本研究利用低吸水性且不含氟之三元乙丙橡膠(Ethylene-Propylene-Diene Monomer, EPDM)與去氫化之丁苯橡膠(styrene-butadiene rubber, SBR)為主要材料,並混摻籠形低聚矽倍半氧烷( Polyhedal Oligomeric Silsesquioxane, POSS)以加強橡膠材料的阻水性能。此後,本研究亦添加UV吸收劑與二氧化鈦(Titanium oxide, TiO2)來提升材料之抗UV能力與反射能力。 第一部分利用塗佈成膜法,將橡膠材料與POSS粒子進行混摻成膜後,以TGA確認其溶劑殘存量,探討材料之熱穩定性,以SEM與EDX觀察兩者之相容性,並用DLS探討溶劑之適當性,最後用恆溫恆濕機測試薄膜之阻水性能,綜合上述測試結果,POSS粒子是可以增加材料的阻水性能,但分散性不佳,導致增加幅度不大,所以分散性為首要目標。 第二部分改用熱壓成膜法,選用POSS粒子分散性較好之溶劑,並改用具有疏水性官能基的POSS粒子。粒子的聚集大小從第一部分8000nm降至400nm左右,分散性有很大的提升。此後,以拉力機測試材料之機械性質,恆溫恆濕機探討阻水性,而後添加UV吸收劑後以UV-vis測試材料之抗紫外光能力,混摻二氧化鈦後以UV-vis觀察材料之反射能力。 實驗結果SEM顯示第二部分的分散性較第一部分好,但PE粒子加到10%後還是會造成嚴重的聚集(>1000nm);機械性質上,POSS粒子可提升材料的應力(L611材料添加粒子可從19Mpa提升至30Mpa)與延伸性;L611材料添加PD粒子後水蒸氣穿透率(WVTR)可從2.8降至2.3 gm/[m2-day];抗UV能力方面,LD5723(L611/5%PD/0.3%UV72)樣品之△YI值可降至1.4,而背板材料所要求之△YI值為小於2;添加3%TiO2可提升L611之反射能力(23% at 500nm 升至87%);加入UV吸收劑與TiO2並不會影響材料之阻水性能。 LD5723T3(L611,5%PD, 0.3%UV72, 3%TiO2)可達到背板材料要求之阻水性、延伸性、耐候性及反射性,只要克服機械強度的不足(90Mpa),是可以取代現有之背板材料。

Topic Category 工學院 > 化學工程學系
工程學 > 化學工業
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