LIU Zengguang, YANG Yingli, WANG Guodong, et al. Gas sensitive characteristics analysis of In0.3Ga0.7As multilayer coupling SQDs[J]. 2021, (5): 5-7+14.
LIU Zengguang, YANG Yingli, WANG Guodong, et al. Gas sensitive characteristics analysis of In0.3Ga0.7As multilayer coupling SQDs[J]. 2021, (5): 5-7+14. DOI: 10.13873/J.1000-9787(2021)05-0005-03.
A detailed analysis of the different laser powers on gas sensing properties of the In
0.3
Ga
0.7
As surface quantum dots(SQDs) stacked on five buried quantum dots(BQDs) layers is carried out.The results show that the presence of SQDs and illumination are two key requirements for the gas sensitivity of the samples.The stronger the laser power
the better the gas sensitivity of the samples.At the same time
in the SQDs coupling structure
the thinner the thickness of GaAs isolation layer
the better the gas sensing performance of the samples.It is shown that the carrier transition between the SQDs layer and the BQDs layer has a very important influence on the gas sen
sing properties of the coupling structure.The results make In
0.3
Ga
0.7
As SQDs very promising for the development of gas sensors.