The Macao SAR Government presented the 2022 Macao Science and Technology Awards on 16 November. Four researchers from the University of Macau (UM) IAPME: Prof. Guichuan XING, Prof. Zikang TANG, Dr. Chao LIANG and Dr. Jia GUO were issued with the Second Prize of Natural Science Award.
The title of award-winning project is “Investigation of Excellent Optoelectronic Properties of Metal-Halide Perovskites”. The development of efficient and low-cost light-to-electricity and electricity-to-light conversion technologies is of great significance to ensure the light harvesting and efficient utilization of clean energy. This is important to guarantee the realization of China’s dual carbon goals. Metal halide perovskites are one kind of material that combined the advantages of both inorganic and organic materials in optics, electricity, mechanical flexibility, low-temperature solution processability and so on. Therefore, perovskite-based optoelectronic devices have achieved remarkable high performance with a low cost, which exhibit broad market potential. In this project, we focused on exploring the photophysical properties of perovskite with ultrafast spectroscopies, aiming to improve device performance and explore new optoelectronic applications. Firstly, the photocarrier generation, transportation and recombination processes in perovskite were systematically investigated. A clear carrier dynamic model for perovskite has been established. The bottlenecks restricting the luminescence efficiency of perovskite were clearly elucidated. Solutions to address these bottlenecks are also proposed. Secondly, to address the stability issue which hindering the commercialization of perovskite solar cells, phase-pure quasi-two-dimensional perovskite films was developed through a novel deposition method. The perovskite solar cells fabricated with this technique possess more balanced efficiency and stability, which could promote the industrialization of perovskite solar cells. In addition, a totally new ultra-short laser pulse doubling application of perovskite has been developed. High-efficiency green and blue perovskite light emitting diodes were also constructed. These works are of great scientific significance for improving the performance of perovskite light-emitting devices and expanding its optoelectronic application.
The winners Prof. Guichuan XING, Prof. Zikang TANG, Dr. Chao LIANG and Dr. Jia GUO said that winning this honor is not only an affirmation of their past work, but also an incentive for future work. In the future, the team will forge ahead, continue to research in depth on optoelectronic materials and devices, promote the industrialization of the project, and focus on the national dual-carbon strategy, promote the diversification of Macao’s economy.
Figure 1 Dimensionality-dependent carrier recombination in metal-halide perovskites
Figure 2 Awards ceremony photos – Guichuan Xing (2nd left), Guo Jia (1st left)
Figure 3 Award certificate