研究目的
Investigating the temperature dependencies at different injection currents of the electroluminescence spectra from a green InGaN/GaN light-emitting diode based on multiple quantum wells grown on a Si substrate.
研究成果
The study found that the temperature-changing characteristic of the EL peak energy evolves from a V-shaped to a wave-shaped and then to an inverted V-shaped dependence with increasing IC. This behavior is influenced by the changing recombination dynamics of carriers and the presence of a stronger carrier localization effect in the MQW active region. The EQE value's temperature behavior at lower ICs is dominated by deactivated non-radiative centers, attributed to high-In-content-induced structural defects. These findings support the development of high-performance LEDs emitting at long wavelengths.
研究不足
The study is limited by the specific characteristics of the green InGaN/GaN MQWs-based LED used, including its growth on a Si substrate and the range of ICs and temperatures tested. The findings may not be directly applicable to LEDs with different structures or materials.