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AlGaInP light-emitting diodes with SACNTs as current-spreading layer

Xia Guo1*, Chun Wei Guo1, Yuan Hao Jin2, Yu Chen1, Qun Qing Li2 and Shou Shan Fan2

Author Affiliations

1 School of Electrical Information and Control Engineering, Beijing University of Technology, Beijing 100124, China

2 Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China

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Nanoscale Research Letters 2014, 9:171  doi:10.1186/1556-276X-9-171

Published: 8 April 2014


Transparent conductive current-spreading layer is important for quantum efficiency and thermal performance of light-emitting diodes (LEDs). The increasing demand for tin-doped indium oxide (ITO) caused the price to greatly increase. Super-aligned carbon nanotubes (SACNTs) and Au-coated SACNTs as current-spreading layer were applied on AlGaInP LEDs. The LEDs with Au-coated SACNTs showed good current spreading effect. The voltage bias at 20 mA dropped about 0.15 V, and the optical power increased about 10% compared with the LEDs without SACNTs.

AlGaInP; Light-emitting diodes (LEDs); Super-aligned carbon nanotube (SACNTs); Current-spreading