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《Chinese Journal of Luminescence》 2017-09
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Preparation of CaAlSiN_3∶Eu~(2+) Phosphor Doped PC Lampshade for Plant Growth Lights

DENG Jian-kun;CHEN Yan-ke;CHEN Zhi-jie;LEI Bing-fu;ZHENG Yin-jian;CUI Jia-wei;YUAN Jun-qiang;SHEN Pan-wang;LI Shan-qian;College of Materials and Energy,Guangdong Provincial Engineering Technology Research Center for Optical Agriculture,South China Agricultural University;Dongguan Longfar Optoelectronics Technology Co.Ltd.;  
In order to achieve the goal of the interchange between traditional white light emitting diodes( WLEDs) and plant growth lights,the fluorescent polycarbonate( PC) lampshades with different mass fraction of CaAlSiN_3∶Eu~(2+)( CASN∶ Eu~(2+)) phosphor were prepared through granulation by high-temperature melting process. The lampshade samples were characterized by structural and optical analysis,showing a good stability during the preparation process. Meanwhile,the fluorescent PC lampshades were equipped with WLED T8 tubes for plant growth lights. The EL spectra,optical parameters and application of such plant growth lights were given. With the increase of CASN∶ Eu~(2+)phosphor mass fraction in PC lampshade encapsulated WLEDs,the CIE color coordinates changefrom( 0. 327 2,0. 346 7) to( 0. 389 5,0. 382 4),the correlated color temperature( CCT) declines from 5 757 to 3 807 K,the color rendering index raises from 70. 3 to 77. 6,but the luminous efficiency decreases slightly. Furthermore,the electroluminescence( EL) spectra of CaAlSiN_3∶Eu~(2+)phosphor doped PC lampshade encapsulated WLEDs match well with the absorption ones of lettuce,and the growth of lettuce is better to be promoted under irradiation by corresponding WLEDs( phosphor mass fraction: 4‰),indicating that the design of combination of fluorescent PC lampshades and LED T8 tubes has a good application prospect for plant growth.
【Key Words】: CaAlSiN_3∶Eu~(2+) polycarbonate lampshade plant growth light WLED
【Fund】: 国家自然科学基金(21671070 21571067);; 广东省自然科学基金(S2013030012842);; 广州市科技计划(201704030086)资助项目~~
【CateGory Index】: TM923.34;TN104.3
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