隨著高科技產品的民用普及化,螢光粉的應用早已琳瑯滿目,不管在日常生活中的日光燈、路上的紅綠燈、發光二極體(LED)、汽車儀表板、告示牌、藝術裝飾品、顯示器(CRT、LCD、VFD)、EL顯示器、手機、個人數位助理(PDA)等等。本研究在於探討ZnS系螢光體應用於EL的發光特性,EL的夠裝以網版印刷法製作,以Al2O3、BaCO3與BaTiO3作為絕緣層材料,以Epoxy、保利樹脂等作為黏結劑,探討其對起始電壓與發光效率的影響。由實驗結果發現,添加20Vol%之BaTiO3絕緣層其發光強度遠高於Al2O3、BaCO3為絕緣層之EL元件;而添加10Vol%之Al2O3絕緣層發光強度次之;添加5Vol%之BaCO3絕緣層的發光強度較弱。而以添加20Vol%之BaTiO3絕緣層之EL元件,通以外加交流電壓則在(60Hz) 90伏特開始發光,元件之橫斷面約300μm。在外加電場下,絕緣層之電場強度高達80KV/cm,已達到螢光粉發光強度之臨界電場。由於導電層Ag之成本高,採用低成本之導電碳粉取代之。在本實驗中,以保利樹脂和Epoxy混合3wt%、5wt%、7 wt%、10 wt%、15 wt%、20 wt%之比例碳粉,結果顯示,以Epoxy混合10 wt%之導電碳粉得到最低之電阻,但其初期發光強度低於以Ag為導電層之元件,藉由降低整EL元件之電阻,包括黏結劑、碳黑之電阻或增加外加之電流,推測後期應可以超越過之。
With civil universal scientific products, phosphor applied to so much. Such as fluorescent lamps, traffic lights, Light Emitting Diode, billboard, monitor ( Cathode Ray Tube, Liquid Crystal Display, Vacuum Fluorescent Display, Electroluminescent Display ), cell phone. This paper studies discuss with the characteristic of Electroluminescence phosphor applied. It producted by scanning-printting. Insulation layer Search for Al2O3、BaCO3、BaTiO3 . Epoxy and gum is the binder. Then we discuss to driving voltage and high luminescent efficiency. Experiment result, device light higher with 10Vol% Al2O3、5Vol% BaCO3、20Vol% BaTiO3. But 20Vol% BaTiO3 luminescent device the most. The electric field intensity of insulation layer is 80KV/cm , it reaches to a threshold of phosphor emission. In the experiment, conduction layer costs too expensive and using carbon glue mix with gum in place of Ag glue. The result, 10 wt% carbon has lower resistivity. But it is relative light too lower yet. To conjecture when devise-resistivity lower、increase electric current, relative luminescence intensity with 10 wt% carbon devise is higher than with Ag glue conduction.