Title
Hydrolysis Mechanism Analysis of (Ca, Sr)AlSiN₃:Eu²⁺ Red Phosphor Aged Under Pressure Cooker Test and 85°C&85%RH Test: Kinetics Modeling and First-principles Calculation
Author
Wen, Minzhen (Fudan University)
Guo, Baotong (Fudan University)
Chen, Shanghuan (Hohai University)
Hu, X. (TU Delft Electronic Components, Technology and Materials)
Fan, Xuejun (Lamar University)
Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials) 
Fan, J. (TU Delft Electronic Components, Technology and Materials; Fudan University; Chinese Academy of Sciences; Fudan Zhangjiang Institute,)
Date
2023
Abstract
The (Ca, Sr) AlSiN₃:Eu²⁺(CSASN:Eu) red phosphor is widely used to improve color rendering of high-power phosphor-converted lighting diode (pc-WLED), but it is always unstable under high temperature and high humidity environments. Therefore, the studies on the temperature and humidity resistance of red phosphors and their aging mechanism have become essential to evaluate its reliability in harsh applications. In this paper, the pressure cooker test (PCT) and 85°C&85% RH aging test were carried out for the CSASN:Eu red phosphors. And, its hydrolysis reaction-driven degradation mechanism was simulated and analyzed based on first-principle calculation, in which the optimized adsorption of simplified CaAlSiN3(CASN) and H2 O was simulated based on Density Function Theory (DFT) and the specific aging process was analyzed by the charge density difference and ab initio molecular dynamics (AIMD). The experimental results showed that the photoluminescence performance of CSASN:Eu red phosphor dropped gradually and finally disappeared under PCT aging, and its temperature-dependent degradation kinetics followed the Arrhenius model well. Meanwhile, the simulation results indicate that the CASN, reacted with H2 O when the H atoms had a tendency to approach N atoms. Both the temperature and humidity could accelerate the hydrolysis reaction rate.
Subject
Degradation
Resistance
Simulation
Phosphors
Humidity
Aging
Rendering (computer graphics)
To reference this document use:
http://resolver.tudelft.nl/uuid:fb74f355-e21e-4385-b1a1-d72a3bd24f94
DOI
https://doi.org/10.1109/EuroSimE56861.2023.10100750
Publisher
IEEE
Embargo date
2023-10-17
ISBN
979-8-3503-4598-8
Source
Proceedings of the 2023 24th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE)
Event
2023 24th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2023-04-16 → 2023-04-19, Graz, Austria
Series
2023 24th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2023
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2023 Minzhen Wen, Baotong Guo, Shanghuan Chen, X. Hu, Xuejun Fan, Kouchi Zhang, J. Fan