Our Current Research Interest

Our current research focuses on high performance, low cost electronic materials and devices including Perovskite Solar Cells, Photodetectors,  Radiation detectors, and X-ray Imagers.  See our publication list for details. We train the next generation of scientists and engineers to help them succeed in very competitive job market as well as in future career, either in academia or private sectors. 

Perovskite Solar Cells

Perovskite materials are arising as a new generation of solution processable metal halide perovskite photovoltaic materials.Our research on perovskite solar cell involves in:

  • Understanding the fundamental material and devices physics, mainly the photon to charge carrier conversion,  to explore the theoretically attainable highest efficiency; 

  • Device design, material processing and material chemistry for the record power conversion efficiency of perovskite solar cells;

  • Understanding the physical and chemical properties of perovskites to enhance the stability of perovskites devices;

  • Scalable manufacturing of perovskite solar panels;

Weak light sensing

Photodetectors are sensor of light that convert optical signals into electric signals. There are generally two types of organic solid -state photodetectors: photoconductors (or photoresistors) and photodiodes (includes photovoltaic).  Photodiodes type photodetector typically has low noise and fast response but the responsivity is low. Photoconductor type photodetector has very large gain but generally slow response. We are working on a new type of organic semiconductor material based photodetector which combines the advantages of these two types of photodetectors. 

We are also studying very fast responding photodetectors with single photon detection capability at room temperature.

X-ray imaging /γ-ray spectroscopy

We are interested in developing perovskite materials based X-ray detectors for X-ray imaging and γ-ray radiation detectors for spectroscopy, which is based on our discovery of ultra-long carrier diffusion length in the strong radiation-stopping perovskites . 

We are developing perovskite pixel detectors and array detectors for X-ray imaging. The next generation of X-ray detectors will be much more sensitive, clearer due to the improved resolution, and cheaper.  

The perovskite gamma-ray single-photon detectors can potentially give high resolution gamma-ray spectroscopy, but are 100-1000 times cheaper than the state-of-the-art products. 

Highlight of Recent Publications

Zhenyi Ni*, Chunxiong Bao*, Ye Liu, Qi Jiang, Wu-Qiang Wu, Shangshang Chen, Xuezeng Dai, Bo Chen, Barry Hartweg, Zhengshan Yu, Zachary Holman, Jinsong Huang†, Science 367, 1352–1358

In this work, we propose a new characterization technique to resolve both the spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. This work answered long-standing question like why single crystal perovskite solar cells are not better polycrystalline solar cells and pointed out a direction to further improve the efficiency of perovskite solar cells by reducing both the surface and bulk trap densities in perovskites through new synthesis.

196   resolving spatial and energetic di

Group News

August 07, 2020

A research assistant professor position is open

https://unc.peopleadmin.com/postings/182122

 

We are also looking for good candidates (Postdoc and Graduate Students) with matched interest and background to join our group.  Please feel free to discuss your interest with Dr. Huang. 

August 06, 2020

U.S. scientists have found a new ‘de-doping’ process in perovskite solar cells that could cut production costs and produce better devices. They have used this to fabricate a mini-module with 17.8% efficiency.

June 14, 2020

“Our outstanding scholars and teachers in the College are among Carolina’s greatest assets,” said Dean Terry Rhodes. “Through their commitment and creativity, they inspire our students, lead groundbreaking research initiatives and provide greater understanding on key issues for the people of North Carolina and beyond. We are delighted that they have been awarded these top honors.”

April 10, 2020

In the first of a regular series looking at who is producing highly cited research in different areas, Times Higher Education explores a subject currently deemed the ‘most prominent’ by Elsevier metrics. Huang Group was ranked 2nd in the world in perovskite solar cell research by Times Higher Education in 2018.

March 29, 2020

Recent work led by Zhenyi Ni and Chunxiong Bao, "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells", which was published in Science, was reported by Tina Casey in Clean Techinica

January 29, 2020

I hope so, but we have not.  Here are some exciting results on blading of perovskites on textured silicon cell to take advantage of both low cost/scalability blading method, and texture structure of silicon to reduce reflection loss.  

January 23, 2020

Yehao's work, "High-Speed, Room-Temperature Bladed perovskite films", published in Science Advances, is highlighted a "High Speed Films", by Giulia Tregnago, Editor or Nature Energy! 

January 17, 2020

Nanoer did again a very good summary of our achievement in 2019.  Here is the link. Thank you, Nanoer!    

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