光學增透膜應用於發光二極體與太陽電池封裝效率之研究

Study of the Encapsulation Efficiency for Light-Emitting Diode and Solar Cell by Applying the Optical Antireflection Films

韋銘展(Ming-Chan Wei)

指導教授 ： 陳文瑞

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所在職專班/碩士(2013年)

摘要

本論文以真空鍍膜技術，針對可見光400~700nm波段、可見光400~600nm波段與紫外光340~420nm，製作用於穿透窗應用之高穿透率玻璃封裝基板，實驗以編號B-270之玻璃材質上使用高折射率藥材La2TiO3與低折射率藥材MgF2製作數組增透膜，將這些增透膜玻璃封裝於太陽電池與發光二極體之穿透窗上，隨後量測這些封裝樣品的光特性與電特性。實驗結果顯示無論單面或是雙面樣品，其平均穿透率隨著鍍膜層數的增加而提高，因而提升太陽電池的轉換效率與提高發光二極體之出光通量。與未鍍膜玻璃封裝之太陽電池比較，單面鍍膜與雙面鍍膜之光電轉換效率比未鍍膜樣品分別高出2.3%與4.6%。對於白光發光二極體之光通量而言，單面鍍膜與雙面鍍膜之光通量比未鍍膜樣品分別高出2.5%與5.3%，所以雙面鍍膜樣品的穿透效率比單面鍍膜為佳。然而穿透光線之效率並無隨著鍍膜對數增加而提升，因兩對、四對、六對、八對鍍膜樣品所量到之效率結果顯示都差不多，所以為了最低成本之考量，選擇兩對鍍膜作為封裝樣品之穿透窗為較佳。對於UV-發光二極體之光穿透率而言，光穿透率會因為層數與膜厚的增加造成光穿透率下降，運用較小功率時，光穿透率會因為膜堆而受到優化，在較大的UV-LED光穿透率時，會因為高折射率藥材參雜金屬材質，造成抗反射膜的吸收與反射導致光穿透率下降。

關鍵字

光學薄膜 ； 封裝

並列摘要

In this dissertation, we used vacuum coating technology to fabricate high transmittance glass packaged substrates for the application of transmittance window in visible 400~700 nm, 400~600 nm and ultraviolet (UV) 340~420nm wavelengths. The several sets of antireflection films were fabricated on a glass numbered B-270 by a high refraction index material La2TiO3 and a low refraction index material MgF2. These glasses with antireflection films were then packaged on the transmittance windows of solar cells and light emitting diodes. The optical and electrical properties of these packaged samples were also characterized. It was found that the average transmittances of the both samples with single and double sides coating films increase with increasing the numbers of coating films, which resulting in improved conversion efficiencies of the solar cells and output luminous fluxes of light emitting diodes. Comparing to the solar cell without packaged glass with antireflection films, the conversion efficiencies of the cells with single and double sides coating films increase 2.3% and 4.6%, respectively. For white light emitting diodes, the luminous fluxes of the diodes with single and double sides coating films are higher than the one without coating films about 2.5% and 5.3%, respectively. Therefore, the transmittance of the sample with double sides coating films is better than the sample with single side coating film. However, the transmittance does not increase with increasing pairs of coating films. For the low cost consideration, two-pairs coating film is the better choice as the transmittance window of the packaged sample because the measured transmittances of the samples with two-, four-, six- and eight-pairs coating films are almost the same. For the UV light emitting diodes, the luminous fluxes of the diodes decrease with increasing the layers and thickness of the coating films. When the diodes operated under low power condition, the luminous fluxes can be optimized by the film layers. On the other hand, when the diodes operated under high power condition, due to the high refraction index material doped metals, the absorption and reflection of antireflection films would result in the decrease of luminous fluxes.

並列關鍵字

Optical film ； package

參考文獻

[6] 張敏南，“提升氮化鎵發光二極體發光效率之研究”，國立成功大學光電科學與工程研究所碩士論，2009。

[7] 楊勁生，“氧化銦錫奈米柱狀結構應用於提升氮化鎵發光二極體之出光效率”，國立交通大學光電工程研究所碩士論，2009。

[5] 莊明正，“太陽電池抗之反射膜特性研究”，清雲科技大學電子工程研究所碩士論，2008。

[8] 林志雄，“使用反應濺鍍法於塑膠基板上製鍍抗反射膜之研究”，國立中央大學光電科學與工程學系碩士論，2008。

[9] H. J. Glaser, Large Area Glass Coating, Von Ardenne, Dresden, 2000.