Lin Wang

Emerging thin film technology

Nanjing Tech University, Nanjing, China

Email: iamlwang@njtech.edu.cn

Biography

Professor WANG Lin is working in the Institute of Advanced Materials, Nanjing Tech University. She received her Bachelor and PhD degree in Physics from Wuhan University in 2009 and the Hong Kong University of Science and Technology in 2013, respectively. She has worked as a postdoc in University of Geneva during 2014-2017. She is mainly focused on the investigation of microscopic electronic processes and light-matter interactions in different two-dimensional materials, with the aim to push the fundamental understanding and new applications of their electronic and optical properties.

Abstract for Presentation

Optical and Optoelectronic Properties of Two-dimensional Ultrathin Perovskites

Two-dimensional materials and perovskites materials have attracted enormous research interest due to rich variety and novel properties. We are mainly focused on the two-dimensional ultrathin perovskite materials, in the aspects of growth precursor, two-step synthesis, heterostructure assembly and opto-electronic properties. Firstly, PbI2 nanosheets with ultrathin thickness and regular shape were obtained by a fast and simple solution-processed method. The optical properties of PbI2 and related heterostructures were investigated. Secondly, several perovskite nanosheets can be simply synthesized by inserting the respective organic cations into the ultrathin PbI2 nanosheets, including MAPbI3, FAPbI3 and RP perovskite with multiple-quantum-well structures. With the assistance of two-dimensional materials and EBL based nanotechnology, we realized the manipulation of a single perovskite nanosheet in pattern design and multicolor tuning. Thirdly, we constructed all-perovskite based 2D heterostructures, which includes 3D-2D ones via oriented assembly and chiral-achiral ones via van der Waals couplings. Fourthly, we demonstrated BP-chiral perovskite-based photodetectors with high mobility and photoresponsivity, as well as the 1D perovskite-based memory device with the record-low power assumption and set voltage.

References

[1] Stimulating and manipulating robust circularly polarized photoluminescence in achiral hybrid perovskites, Nano Letters, https://doi.org/10.1021/acs.nanolett.2c00482 (2022).

[2] Enhanced Photodetector Performance of Black Phosphorus by Interfacing with Chiral Perovskite, Nano Research, accepted (2022).

[3] One-Dimensional (NH=CINH3)3PbI5 Perovskite for Ultralow Power Consumption Resistive Memory, Research, 2021, 9760729, 9 (2021).

[4] Thickness Dependent Properties of Ultrathin Perovskite Nanosheets with Ruddlesden-Popper-like Atomic Stackings, Nanoscale, 13, 18961 (2021).

[5] Engineering the Phases and Heterostructures of Ultrathin Perovskite Nanosheets, Advanced Materials, 2002392 (2020).

[6] Band Structure Engineering of Interfacial Semiconductors Based on Atomically Thin Lead Iodide Crystals, Advanced Materials, 1806562 (2019).