By Ashwini Sakharkar 23 Aug, 2024
Collected at: https://www.techexplorist.com/novel-approach-monitors-perovskite-ageing-real-time/87809/
Hybrid perovskites hold immense promise for revolutionizing advanced electronic devices such as solar cells and LEDs. However, their potential for widespread commercial use is hindered by a critical drawback – they do not endure as long as necessary. Over time, these materials experience a decline in performance, posing a significant challenge for researchers and businesses alike.
To address this critical issue, it’s imperative to not only enhance the stability of these perovskites but also to establish real-time monitoring techniques for tracking their aging process. By gaining insights into how these materials degrade over time, we can enhance their durability and overall efficiency.
In a recent study, Prof. Yiwen Sun and her team at Shenzhen University have revolutionized the understanding of perovskite ageing. By employing terahertz time-domain spectroscopy, they have unlocked the ability to witness the aging process in real-time. Their innovative technique harnesses the resonant absorption of terahertz waves by phonons in perovskite, allowing them to observe a significant reduction in the intensity of phonon vibration modes linked to the Pb-I bonds as the perovskite ages.
This leads to observable shifts in the absorption peaks of R waves at specific frequencies. As a result, they have proposed utilizing the intensity of these terahertz absorption peaks as an indicator to accurately measure the ageing degree of perovskites in real-time.
These findings hold immense promise as they offer a practical and efficient means to monitor the ageing of perovskites, paving the way for the rapid and reliable deployment of perovskite-based devices in various applications, ultimately enhancing their overall performance and reliability for everyday use.
Journal reference:
- Jinzhuo Xu, Yinghui Wu, Shuting Fan, Xudong Liu, Zhen Yin, Youpeng Yang, Renheng Wang, Zhengfang Qian, Yiwen Sun. Real-time detection of ageing status of methylammonium lead iodide perovskite thin films by using terahertz time-domain spectroscopy. Frontiers of Optoelectronics, 2024; DOI: 10.1007/s12200-024-00128-0
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