Application Case | Precision Control of ALD Process: ATP5020P Supports the Industrialization of Perovskite Quantum Dots

2025-12-19

Perovskite quantum dots (CsPbBr₃), known for their high color purity and excellent luminescence efficiency, are a core material for next-generation display technologies. However, their intrinsic instability when exposed to moisture, oxygen, light, and heat severely limits commercial application.

01 Atomic Layer Deposition (ALD) Technology

Atomic Layer Deposition (ALD) enables nanoscale thin-film deposition through self-limiting surface reactions, providing a dense inorganic protective layer for perovskite quantum dots. This is an effective solution for enhancing their environmental stability. In industrial applications, ALD technology can significantly extend the operational lifespan of quantum dot color conversion layers within display devices, establishing a critical process foundation for mass production of next-gen technologies like Micro-LED and QLED.

Deposition temperature is a key parameter affecting ALD encapsulation efficacy. Excessively low temperatures lead to insufficient precursor reaction and poor film density, while overly high temperatures can damage the quantum dot lattice structure, causing irreversible performance degradation. Therefore, identifying the optimal deposition temperature window is crucial for industrializing quantum dot devices.

02 Research Case

Systematic experiments confirmed that 75°C is the optimal ALD encapsulation temperature for CsPbBr₃ quantum dots. Samples prepared under this condition maintained their initial photoelectric performance while demonstrating excellent environmental stability.

This study utilized the Optosky ATP5020P spectrometer for photoluminescence (PL) spectroscopy collection and optical performance characterization, providing key data for process optimization:

Key Technical Support from the ATP5020P Spectrometer

001 Accurate Optical Performance Quantification

ATP5020P's high sensitivity and spectral resolution enable precise measurement of the quantum dots' photoluminescence and absorption spectra, providing a reliable basis for assessing the impact of different ALD processes on their intrinsic optical properties.

002 Real-time Monitoring for Stability Testing

During accelerated aging tests (thermal cycling, blue light irradiation, high temperature/high humidity), the instrument's high signal-to-noise ratio and measurement stability ensure the accuracy of long-term test data, delivering continuous and reliable performance degradation curves to evaluate encapsulation effectiveness.

003 System Integration for In-situ Testing

Its fiber optic connectivity allows integration with temperature-controlled platforms, supporting in-situ PL spectroscopy collection under variable temperatures. This provides technical support for studying temperature-dependent carrier recombination mechanisms.

03 Industrial Validation and Application Prospects

CsPbBr₃ quantum dots encapsulated using the 75°C ALD process have been successfully applied in white LED devices. Test results show a color gamut coverage of 94.00% NTSC and 86.20% Rec.2020. Furthermore, the devices retained over 85% of their initial color gamut value after 600 hours of continuous operation, significantly outperforming unencapsulated devices.

This achievement demonstrates the industrial feasibility of ALD encapsulation technology in the quantum dot display field, providing a reliable color conversion solution for Micro-LED full-color displays. It also shows application potential in areas like wide-gamut lighting and visible light communication.

04 Conclusion

Optosky ATP5020P spectrometer, with its precise optical measurement capabilities and flexible system integration, plays a vital role in developing ALD encapsulation processes for perovskite quantum dots, providing essential technical support for process optimization and industrialization. As ALD encapsulation technology continues to advance, perovskite quantum dots are poised for broader application within the optoelectronics field.

For more information, please contact:

Email: optoskyphotonics@gmail.com

Web: Optosky.net

References

Zijun Yan, Fangshun Ye, Liyue Xu, Xiao Yang, Shouqiang Lai, Shuli Wang, Yue Lin, Guolong Chen, Yijun Lu, Hao-Chung Kuo, Zhong Chen, Tingzhu Wu, Optimum temperature of atomic layer deposition of alumina on CsPbBr3 quantum-dot for optical performance and environmental stability, Journal of Luminescence, Volume 261, 2023, 119905, ISSN 0022-2313, //doi.org/10.1016/j.jlumin.2023.119905.

Application Case | ATP2400: Unveiling the Gasification Mechanism of PTFE in Thermal Plasma

Application Case | ATP5020R Spectrometer: Gaining In-Situ Raman Insights into Pollutant Degradation Catalyzed by MBene