Yuan Yaxuan, Xian Yeming, Long Yi, Zhang Yangyi, Rahman Naveed Ur, Zhang Yongli, Fan Jiandong, Li Wenzhe
Institute of New Energy Technology, Department of Electronic Engineering, College of Information Science and Technology, Jinan University Guangzhou 510632 China
Department of Ecology, College of Life Science and Technology, Jinan University Guangzhou 510632 China,
RSC Adv. 2021 Jul 16;11(40):24816-24821. doi: 10.1039/d1ra03957a. eCollection 2021 Jul 13.
Dimensionality engineering has proved to be a reliable strategy for addressing the issue of perovskite stability. In this study, a series of previously unreported low-dimensional organic-inorganic hybrid perovskite single crystals were designed and grown by following a simple hydrothermal approach involving solution processing. The as-prepared terpyridine-derived perovskite single crystals displayed tunable structures and electronic dimensionality, which was closely associated with the crystal growth conditions. The performed DFT calculations suggested that the fluctuating conduction band edge demonstrates obvious charge delocalization associated with the π-conjugation effect, a feature promoting efficient charge transport by means of coupling structural dimensionality and electronic dimensionality. This study has provided new ideas for the design of new materials to be used in fields involving photovoltaic devices.
维度工程已被证明是解决钙钛矿稳定性问题的可靠策略。在本研究中，通过一种涉及溶液处理的简单水热方法，设计并生长了一系列此前未报道的低维有机-无机杂化钙钛矿单晶。所制备的基于三联吡啶的钙钛矿单晶表现出可调谐的结构和电子维度，这与晶体生长条件密切相关。进行的密度泛函理论（DFT）计算表明，波动的导带边缘显示出与π共轭效应相关的明显电荷离域，这一特征通过耦合结构维度和电子维度促进了有效的电荷传输。本研究为设计用于光伏器件等领域的新材料提供了新思路。
