Ultraviolet light-emitting diodes (UV LEDs) have been widely applied in various fields, such as sewage treatment, sterilization, and disinfection medical treatment. However, the remained problems of UV LEDs mainly concern poor photoelectric stability, low efficiency, safety protection, and among others. In order to evaluate and predict the stability and lifetime of UV LEDs safely and efficiently, a comprehensive UV LEDs two-step aging test system has been designed in this work. Two steps of different temperature stresses with total aging time up to 720 h are applied to UV LEDs. The junction temperature derived from spectroscopy has been taken under consideration during the test to evaluate lifetime accurately. A smartphone-based remote control and test scheme has been developed to monitor and control the online testing and therefore ensure the safety and convenience during the aging experiment.

中文翻译：

---

紫外发光二极管远程在线两步应力寿命加速测试系统

紫外发光二极管（UV LED）已广泛应用于污水处理、杀菌、消毒医疗等各个领域。然而，UV LED仍然存在的问题主要是光电稳定性差、效率低、安全防护等。为了安全有效地评估和预测UV LED的稳定性和寿命，本文设计了一套综合的UV LED两步老化测试系统。对 UV LED 施加两步不同的温度应力，总老化时间长达 720 小时。在测试过程中已经考虑了从光谱得出的结温，以准确评估寿命。