Perovskite Crystals with a Gradient Composition--2022 Honorable mention. In Art of Science

Caption: Perovskite crystals with outstanding electron transport properties for next generation solar cells Participant category: Faculty/Project Scientist Departments: Nanoengineering, Bioengineering, and Electrical and Computer Engineering Due to their remarkable charged carrier dynamics, hybrid halide perovskites (HHPs) have tremendous potential for the next-generation electronic and optoelectronic devices. My group demonstrated chemical epitaxial growth of single crystal HHP thin films for the first time. We have also been able to create an unprecedented compositional gradient by continuously tuning the growth precursor composition. This compositional gradient generates a bandgap gradient along the thickness direction, which is necessary for efficient sunlight absorption and facilitates the dissociation and collection of carriers.标题：面向下一代太阳能电池、具备优异电子传输性能的钙钛矿晶体 参与者类别：教职员工/项目研究员 所属院系：纳米工程系、生物工程系与电子与计算机工程系 鉴于杂化卤化物钙钛矿（hybrid halide perovskites，HHPs）出色的载流子动力学特性，其在下一代电子与光电子器件领域拥有巨大应用潜力。本团队首次实现了杂化卤化物钙钛矿单晶薄膜的化学外延生长。我们还通过持续调控生长前驱体的组分，制备出了前所未有的组分梯度结构。该组分梯度会沿厚度方向形成带隙梯度，这一结构可实现高效的太阳光吸收，并有助于载流子的解离与收集。