{"title":"Investigation on the mechanism of carrier recombination in the GaN-based blue laser diode before lasing","authors":"F. Liang, Huang Yujie, Jing Yang, Ping Chen, Zongshun Liu, Degang Zhao","doi":"10.1088/1361-6463/ad66de","DOIUrl":null,"url":null,"abstract":"\n The carrier recombination behaviour of GaN-based blue laser diodes (LDs) is studied and analysed by experiments and simulation calculation before lasing, especially the role of Auger recombination. It is found that Auger recombination plays a crucial role on the decrease of differential efficiency and threshold current of GaN-based blue LDs. The theoretical calculation results show that a large Auger recombination rate may lead to a dominant recombination channel before lasing, which could exceed the radiation recombination and result in an obvious decrease of the differential efficiency. Such a high Auger recombination will dissipate a large number of carriers in the quantum well, resulting in deterioration of device performance, a higher threshold current and a lower efficiency. This work presents a method to evaluate the Auger recombination through the differential efficiency, and also give a clue that suppressing auger recombination rate is beneficial to improve the performance of blue LDs.","PeriodicalId":507822,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics D: Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1361-6463/ad66de","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The carrier recombination behaviour of GaN-based blue laser diodes (LDs) is studied and analysed by experiments and simulation calculation before lasing, especially the role of Auger recombination. It is found that Auger recombination plays a crucial role on the decrease of differential efficiency and threshold current of GaN-based blue LDs. The theoretical calculation results show that a large Auger recombination rate may lead to a dominant recombination channel before lasing, which could exceed the radiation recombination and result in an obvious decrease of the differential efficiency. Such a high Auger recombination will dissipate a large number of carriers in the quantum well, resulting in deterioration of device performance, a higher threshold current and a lower efficiency. This work presents a method to evaluate the Auger recombination through the differential efficiency, and also give a clue that suppressing auger recombination rate is beneficial to improve the performance of blue LDs.