摘要
为了实现传统白光LED光源与植物照明用光源之间的快速转换,采用高温熔融造粒的方式制备了不同质量分数CaAlSiN_3∶Eu^(2+)(CASN∶Eu^(2+))掺杂的荧光聚碳酸酯(PC)透光罩,并进行了结构和光学分析。制备了荧光PC透光罩配备的T8型LED灯管,测试了其EL光谱、相关光学性质以及对于生菜的种植效果。结果表明,CASN∶Eu^(2+)荧光粉在掺杂过程中性质稳定,该灯管随着配备的透光罩的荧光粉掺杂浓度的提高,相对应的WLED的色坐标从(0.3272,0.3467)变化到(0.3895,0.3824),色温从5757K下降到3807K,显色指数从70.3上升到77.6,但光效略有减弱。配备了荧光粉质量分数为4‰透光罩的T8型白光LED灯管的光质更适合生菜生长。
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 CaAlSiN3∶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 CaAlSiN3∶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.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2017年第9期1185-1191,共7页
Chinese Journal of Luminescence
基金
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~~
