Halide Perovskite - Polyelectrolyte Hybrid Materials for Next Generation Optoelectronics

Interdisciplinary Areas: Micro-, Nano-, and Quantum Engineering, Power, Energy, and the Environment

Project Description

Organic-inorganic hybrid halide perovskites are emerging semiconductor materials with excellent optical and electronic properties. Over the last several years, there has been tremendous progress in the development of high performance solar cells and light emitting diodes using these materials. Because of the ionic nature of the chemical bonding and the great solubility in common organic solvents, low-temperature solution-processing approach is usually employed to process the materials and fabricate the devices. This is dramatically different from traditional inorganic materials. At such mild conditions, controlling the crystal and thin film growth and defects formation are critically important. In addition to tuning the growth parameters (e.g. temperature, precursor concentration, choice of solvents, etc.), using additives during the crystal growth is another promising way to achieve better perovskite materials. But this approach has not been well-investigated. In this joint project, we propose to use polyelectrolytes (including DNA and synthetic polymers) to guide the perovskite growth and improve their electronic properties. The combination of halide perovskites with charged polymers may lead to new type of photo-active hybrid materials with better mechanical flexibility as well as superior charge transport properties for a wide range of applications, including photovoltaics, displays, skin sensors, etc. 

Start Date


Postdoc Qualifications

Ph.D. in Chemical Engineering, Materials Science, Chemistry, or related fields.
Rich experience in materials synthesis, characterization, and thin film electronic devices fabrication. 
Letian Dou; Davidson School of Chemical Engineering

Jianguo Mei; Chemistry 
1. Jia Lin, Minliang Lai, Letian Dou, Christopher S. Kley, Hong Chen, Fei Peng, Junliang Sun, Dylan Lu, Steven A. Hawks, Chenlu Xie, Fan Cui, A. Paul Alivisatos, David T. Limmer, Peidong Yang; “Thermochromic halide perovskite solar cells”, Nature Materials 2018, 17, 261-267.
2. Cun-Zheng Ning, Letian Dou, Peidong Yang; “Bandgap engineering in semiconductor alloy nanomaterials with widely tunable compositions”, Nature Reviews Materials 2017, 2, 17070.
3. Letian Dou; “Emerging two-dimensional halide perovskite nanomaterials”, Journal of Materials Chemistry C 2017, 5, 11165-11173.
4. Letian Dou, Andrew B. Wong, Yi Yu, Minliang Lai, Nikolay Kornienko, Samuel W. Eaton, Anthony Fu, Connor G. Bischak, Jie Ma, Tina Ding, Naomi S. Ginsberg, Lin-Wang Wang, A. Paul Alivisatos, Peidong Yang; “Atomically Thin Two-dimensional Organic-inorganic Hybrid Perovskites”, Science 2015, 349, 1518-1521.
5. Jiayingzi Wu, Liyan You, Lu Lan, Hyeon Jeong Lee, Saadia T Chaudhry, Rui Li, Ji‐Xin Cheng, Jianguo Mei; “Semiconducting Polymer Nanoparticles for Centimeters‐Deep Photoacoustic Imaging in the Second Near‐Infrared Window”, Advanced Materials 2017, 29, 1703403.
6. Yan Zhao, Aristide Gumyusenge, Jiazhi He, Ge Qu, William W McNutt, Yuan Long, Hongyi Zhang, Libai Huang, Ying Diao, Jianguo Mei; “Continuous Melt‐Drawing of Highly Aligned Flexible and Stretchable Semiconducting Microfibers for Organic Electronics”, Advanced Functional Materials 2018, 28, 1705584.