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首页> 外文会议>International Conference on Materials Engineering and Science >The Effect of The Wavelength of the LED used to Pump Phosphor Produced from Curcuminoids Bye Extracted from Turmeric (Curcuma Longa L.) to Produce White Light
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The Effect of The Wavelength of the LED used to Pump Phosphor Produced from Curcuminoids Bye Extracted from Turmeric (Curcuma Longa L.) to Produce White Light

机译：LED波长的影响用于从姜黄（Curcuma Longa L.）中提取的姜黄素中产生的泵浦磷光体，以产生白光

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Previous studies have investigated the use of curcuminoids dye extracted from turmeric (Curcuma longa L.) for light down-conversion of UV light (390 nm) for application as white light emitting diode (WLED) as well as the three methods used to extract curcuminoids dye (the normal method, use of Soxhlet apparatus and by combining the normal method with the Soxhlet extraction). This paper goes a step further to analyze the effect of the wavelengths of LED sources (365, 390 and 445nm) used to pump phosphor in the conversion of white light. The chromaticity coordinates (CIE), color rendering index (CRI) and color temperature (CCT) were measured for different applied currents (20, 60 and 100mA) and weights of curcuminoids (5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55mg). With optimum CRI, CIE and CCT values of 73.9, 0.3304;0.3501, and 5579K, respectively, the samples pumped with LED source of 365 nm wavelength produced better white light compared to 390 and 445 nm, in terms of the amount of phosphor used. Thus, the wavelength of the LED source used to pump phosphor is inversely related to the amount of yellow light produced into the blue light when the concentration of phosphor is constant. The stress test showed that the degradation time of the dye could be improved by reducing the wavelength used to pump the sample or selecting a weak thermal conductivity material.
机译：以前的研究已经研究了从姜黄（Curcuma Longa L.）中提取的姜黄素染料用于uV光（390nm）的透明转化为白色发光二极管（WLED）以及用于提取姜黄素的三种方法染料（正常方法，使用Soxhlet装置的用途，通过将正常方法与Soxhlet提取结合）。本文进一步进一步分析了LED源（365,390和445nm）的波长在白光转换中泵浦磷光体的影响。测量色度坐标（CIE），显色指数（CCT）和色温（CCT），用于不同施加的电流（20,60和100mA）和姜黄素重量（5,10,15,20,25,30,35 ，40,45,50和55mg）。具有73.9,0.3304; 0.3501和5579K的最佳CRI，CIE和CCT值，分别与365nm波长的LED源泵送的样品在使用的磷光体的量而产生的365nm波长的LED源增加365nm波长的白色光线。因此，当磷光体浓度是恒定的时，用于泵浦磷光体的LED源的波长与在蓝光中产生的黄色的量反向相关。应力测试表明，通过减小用于泵送样品的波长或选择弱导热率材料，可以提高染料的降解时间。

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