AlGaInP light-emitting diodes with SACNTs as current-spreading layer
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
Nanoscale Research Letters 2014, 9:171 doi:10.1186/1556-276X-9-171Published: 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.