講演情報
[15p-P11-1]Proposal of Measurement Method for Effective Internal Optical Power and Internal Quantum Efficiency of Optical Semiconductor Devices
〇Byongjin Ma1, Taehee Jung1, Sungsoon Choi1, Jemin Kim1, Kwanhun Lee1 (1.KETI)
キーワード：
IQE、LED、LD
An internal quantum efficiency (IQE) of the semiconductor optical devices such as light-emitting diodes (LED) and laser diodes (LD) is the most important tool to investigate the mechanism of their efficiency drop and the optical degradation of them. The conventional IQE measurement methods have used the electrical and the optical properties under the limited environment and operation conditions such as an extremely low temperature and a low current density of the devices. Furthermore, they need several assumptions to obtain the absolute values of the IQE.
In order to overcome these drawbacks, we propose new IQE measurement method, which includes the electrical, optical and thermal properties such as the junction temperature of the active region in semiconductor devices. We derived a model for effective internal optical power, defined as a power affecting junction temperature of the devices. Based on this value, we could make a IQE model for LEDs and LDs and carried out verification process using a blue InGaN/GaN LED sample. Our method has no need for assumptions, which is essential for the conventional method. And it needs only relative optical power instead of absolute optical power.
This work (RS-2023-KI002797) was supported in part by the Ministry of Trade, Industry and Energy in Korea.
In order to overcome these drawbacks, we propose new IQE measurement method, which includes the electrical, optical and thermal properties such as the junction temperature of the active region in semiconductor devices. We derived a model for effective internal optical power, defined as a power affecting junction temperature of the devices. Based on this value, we could make a IQE model for LEDs and LDs and carried out verification process using a blue InGaN/GaN LED sample. Our method has no need for assumptions, which is essential for the conventional method. And it needs only relative optical power instead of absolute optical power.
This work (RS-2023-KI002797) was supported in part by the Ministry of Trade, Industry and Energy in Korea.