Ultralow-voltage-drop GaN/InGaN/GaN tunnel junctions with 12% indium content

作者：Akyol Fatih; Zhang Yuewei; Krishnamoorthy Sriram; Rajan Siddharth

来源：Applied Physics Express, 2017, 10(12): 121003.

DOI：10.7567/APEX.10.121003

We report a combination of highly doped layers and polarization engineering that achieves highly efficient blue-transparent GaN/InGaN/GaN tunnel junctions (In content = 12%). NPN diode structures with a low voltage drop of 4.04V at 5 kA/cm(2) and a differential resistance of 6.51 x 10(-5) Omega center dot&cm(2) at 3 kA/cm(2) were obtained. The tunnel junction design with n(++)-GaN (Si: 5 x 10(20)cm(-3))/3nmp(++)- In0.12Ga0.88N (Mg: 1.5 x 10(20) cm(-3))/p(++)-GaN (Mg: 5 x 10(20)cm(-3)) showed the best device performance. Device simulations agree well with the experimentally determined optimal design. The combination of low In composition and high doping can facilitate lower tunneling resistance for blue- transparent light- emitting diodes.

• 出版日期2017-12