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隔离槽角度和电极桥对高压LEDs性能的影响

Effect of Isolation Trench Angle and Electrode Bridge on the Performance of High-Voltage LEDs
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摘要 通过改变高压LEDs芯粒隔离槽角度和电极桥接方式,制备了四种六芯粒串联的高压LEDs,并记为HVLED1-1,HVLED1-2,HVLED2-1,HVLED2-2.将其电学性能和光学性能进行对比之后的结果表明:隔离槽呈梯形状的样品性能明显优于隔离槽侧壁呈直角状的样品;采用空气桥桥接电极方式的样品性能明显优于采用传统电极桥接方式的样品.HVLED2-2和HVLED1-2的I-V特性曲线几乎吻合,在正向电流20mA驱动下,工作电压低于HVLED2-1和HVLED1-1,但是HVLED2-2性能最优,光相对输出强度最高. By Changing the angle of isolation trench and the bridging pattern of electrode,four kinds of high-voltage LEDs with 6 series chips were prepared and noted respectively as HVLED1-1,HVLED1-2,HVLED2-1,HVLED2-2.A comparison of their electrical and optical properties finds that the sample using a trapezoidal isolation trench gives a better performance than that one using the vertical isolation trench,and the sample using the air-bridge electrode performs a lot better than the one adopting conventional electrode bridging mode.The I-V characteristic curve of HVLED2-2 was approximate to fit that of LED2-1.At the forward driving current of 20mA,the working voltage of HVLED2-2 and HVLED1-2 were lower than that of HVLED2-1 and HVLED1-1.Yet the performance of HVLED2-2 was the best since its relative light output intensity was the highest of the four.
作者 卫静婷 黎斌 WEI Jingting;LI Bin(School of Engineering Technology, The Open University of Guangdong (Guangdong PolytechnicInstitute),Guangzhou, Guangdong 510091, China)
出处 《内江师范学院学报》 CAS 2021年第8期53-57,76,共6页 Journal of Neijiang Normal University
基金 广东开放大学科研项目(1721) 广东省教育厅特色创新项目(2017KTSCX226)。
关键词 高压LEDs 桥接电极 隔离槽 high-voltage LEDs bridging electrode isolation trench
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