Author: LetianDou

The group warmly welcomes a new postdoctoral researcher Dr. Zhengfei Liu and a visiting PhD student Kyung Ho Kim joining us. Zhengfei received his PhD in chemistry from Beijing Normal University with Prof. Qing-Zheng Yang. Kyung Ho is currently a PhD student in chemical engineering at Korea University with Prof. Sang Hyuk Im. Welcome to the group and look forward to working together!

The group warmly welcomes a new visiting PhD student Mehrdad Faraji joining us. Mehrdad is currently a PhD student at Italian Institute of Technology & University of Genova with Dr. Roman Krahne. Mehrdad will spend 8 months with us working on perovskite heterostructures. Welcome to the group and look forward to working together!

Sung-Doo and Wenhao’s paper reporting highly efficient perovskite NIR LED has been published in Nature Communications. We demonstrate a grain engineering methodology that combines solvent engineering and heterostructure construction to improve light outcoupling efficiency (to ~ 40%) and defect passivation. The resulting near-infrared perovskite light-emitting diodes achieve a peak external quantum efficiency of 31.4% and demonstrate a maximum brightness of 929 W sr⁻¹ m⁻². These findings indicate that perovskite light-emitting diodes have potential as cost-effective, high-performance near-infrared light sources for practical applications. Read the story here.

Dr. Dou received 2024 AIChE Nanoscale Sci. & Engr. Forum Young Investigator Award; 2025 ACS Photonics Young Investigator Lectureship Award; and is recognized again by Clarivate (Web of Science) as a Highly Cited Researcher in Cross-Fields. Congratulations!

Derrick Villalba join our group as a first-year graduate student. Derrick receives his BS in Georgia Institute of Technology. He will work on characterization and device physics of OSiP. Welcome to the group and look forward to working together!

Wenhao received first prize in AIChE’s Materials Engineering and Science Division poster award competition. Congratulations!

Yu-Ting and Zhixu passed their qualifier exams and become PhD candidate now. Congratulations!

Undergrad student Anika is selected to receive Honors College Scholarly Project grant to support her BS thesis research. Congratulations!

The group warmly welcomes a new visiting postdoc fellow Dr. Jing Li and a
SERB-OVDF fellow Avija Ajayakumar joining us. Jing received his PhD from Dalian University of Technology with Prof. Yiming Yang; Avija is currently a PhD student at National Institute For Interdisciplinary Science and Technology (NIIST) with Dr. Vijayakumar Chakkooth. Both of them will spend a year with us. Welcome to the group. Look forward to working together!

Kang’s work on two-dimensional-lattice-confined single-molecule-like aggregates has been published in Nature. Congratulations!

We discovery an unprecedented phase of molecular aggregate that forms in a two-dimensional hybrid perovskite superlattice with a near-equilibrium distance, which we refer to as a single-molecule-like aggregate (SMA). By implementing two-dimensional superlattices, the organic emitters are held in proximity, but, surprisingly, remain electronically isolated, thereby resulting in a near-unity photoluminescence quantum yield, akin to that of single molecules! Moreover, the emitters within the perovskite superlattices demonstrate strong alignment and dense packing resembling aggregates, allowing for the observation of robust directional emission, substantially enhanced radiative recombination and efficient lasing. Read the story here.

This work is highlighted by Purdue, Notre Dame, etc.