Month: August 2023

Another beautiful work by Ajeet, entitled “Two-Dimensional Halide Pb-Perovskite–Double Perovskite Epitaxial Heterostructures” is published in JACS now, same day with Jee’s nature chemistry paper. What a day!

We report epitaxial core-shell heterostructures via growing Pb-free double perovskites (involving combinations of Ag(I)–Bi(III), Ag–Sb, Ag–In, Na–Bi, Na–Sb, and Na–In) around Pb perovskite 2D crystals. Interestingly, distinct from Pb–Pb and Pb–Sn perovskite heterostructures, growths of the Pb-free shell at 45° on the (100) surface of the lead perovskite core are observed in all Pb-free cases. Read the story here.

Jee, Ruyi (Duke-Blum group), Jie (ICCAS-Zhao group), and Linrui (Purdue-Huang group)’s paper entitled “Thickness control of organic semiconductor-incorporated perovskites” has been published in Nature Chemistry. Most complex perovskite single crystal structures resolved. 4 years of hard working has been paid off. Congratulations!

Read the story here. Purdue news release here; Duke news release here; featured in Phys.org; EurekAlert!; etc.

Our former postdoc, Dr. Enzheng Shi, now asst. prof at Westlake University, has published his team’s first independent paper in Science Advances entitled “Phase-pure 2D tin halide perovskite thin flakes for stable lasing“. This is an important first step. Congratulations!

Yanqi (Argonne National Lab, leading author) and Shuchen’s work on Photo-induced halide redistribution in 2D halide perovskite lateral heterostructures has been published in Joule. Big congratulations!

An improved understanding of the degradation pathways under external stimuli is needed to address stability challenges in two-dimensional (2D) perovskite semiconductor materials. In this study, in situ synchrotron nanoprobe X-ray fluorescence (nano-XRF) is used to investigate the evolution of halide redistribution within various 2D halide perovskite (n = 1–3) lateral heterostructures under ultraviolet (UV) exposure. Important fundamental insights on the photo-induced halide redistribution and structural transformation have been unveiled in this work. Read the story here.

The group welcomes two new visiting students: Prashant Kumar, PhD student from Central University of Jharkhand, India and Katerin Rodríguez, undergrad student from National University of Colombia to join the group. Prashant will stay for 1 year working on perovskite solar cells and Katerin will stay for 6 months working on polymer recycling. Welcome to Purdue and look forward to working together!

Quick updates on several important new publications:

1. Collaborative work with Savoie group led by Zih-Yu Lin and Jiaonan on Design Rules for Two-Dimensional Organic Semiconductor-Incorporated Perovskites (OSiP) using DFT/MD/machine learning + experiments has been published in Angew. Chem. Read the story here.

2. Collaborative work with Huang group led by Shuchen and Dewei “Unraveling the Effect of Stacking Configurations on Charge Transfer in WS₂ and Organic Semiconductor Heterojunctions” has been published in Precis. Chem. Read the story here.

3. Jisung’ (MS student)’s work on “Reduced Energetic Disorders in Dion–Jacobson Perovskites for Efficient and Spectral Stable Blue LEDs” has been published in Adv. Opt. Mater. Read the story here.

4. Yoon Ho’s work on “One-Step Solution Patterning for Two-Dimensional Perovskite Nanoplate Arrays” has been published in ACS Nano. Read the story here.

Congratulations to the team!