Paper Published in Advanced Materials | 曽我部研究室 SogabeLab 国立大学法人電気通信大学│AI 人工知能 量子

The paper was published in Advanced Materials, a prestigious journal with an impact factor of over 32.

https://onlinelibrary.wiley.com/doi/10.1002/adma.202301834

“Enhanced Hot-Phonon Bottleneck Effect on Slowing Hot Carrier Cooling in Metal Halide Perovskite Quantum Dots With Alloyed A-Site“

Hua Li, Qing Wang, Yusuke Oteki, Chao Ding, Dong Liu, Yao Guo, Yusheng Li, Yuyao Wei, Dandan Wang, Yongge Yang, Taizo Masuda, Mengmeng Chen, Zheng Zhang, Tomah Sogabe, Shuzi Hayase, Yoshitaka Okada, Satoshi Iikubo, Qing Shen: Advanced Materials [IF: 32.086] vol.35, 2301834(2023) DOI 10.1002/adma.202301834 (2023/6/13)

This study explores the impact of A-site cation cross-exchange on hot-carrier relaxation dynamics in perovskite quantum dots (PQDs), crucial for advancing photovoltaic technologies. Using ultrafast transient absorption spectroscopy, it shows that alloyed PQDs exhibit longer lifetimes in the slow cooling stage due to co-vibrational optical phonon modes, enhancing the hot-phonon bottleneck effect and acoustic phonon upconversion.