“…Figure 7 demonstrates the experimental results of the relationship between Al component and TMAl/III in AlGaN layers, indicating that the relationship between them was relatively large in different growth environments. 51,53,[57][58][59][60][61][62]45,46,63 In the experiments of Song et al, 61 Ubukata et al 46 and Miyoshi et al, 51 the Al component in the AlGaN layer was larger than the TMAl/III at the inlet, and the parasitic reaction was suppressed. While, in the experiments of Mihopoulos et al 59 and Lobanova et al, 60 the Al component was smaller, and the parasitic reaction was strong.…”