研究领域：

1. 柔性电子与光电器件

2009 南开大学化学学院 功能高分子材料教育部重点实验室 博士
2009-2011 南开大学物理科学学院 博士后
2011-2015 美国加州大学洛杉矶分校 材料科学与工程系 博士后
2015-2016 美国加州大学洛杉矶分校 材料科学与工程系 先后任Staff Research Associate 和 Assistant Researcher
2016-至今 南开大学化学学院 高分子化学研究所 研究员、教授 博士生导师

2018-2020年连续入选科睿唯安（Clarivate Analytics）全球高被引学者。

近年来，发表论文70多篇，累计引用次数20000余次，H因子40。多篇论文被评为ESI高被引论文。2018-2020年连续入选科睿唯安（Clarivate Analytics）全球高被引学者。申请美国专利2项（授权1项），申请中国专利5项（授权3项）。

1.  Guangwei Lv,# Ling Li,# Di Lu,# Zhiyuan Xu, Yixin Dong, Qiaohui Li, Zhitao Chang, Wan-Jian Yin,* and Yongsheng Liu*. Multiple-Noncovalent-Interaction-Stabilized Layered Dion−Jacobson Perovskite for Efficient Solar Cells. Nano Lett. 2021, 21, 5788–5797. 

2. Tingting Liu#, Jiahao Guo#, Di Lu, Zhiyuan Xu, Qiang Fu, Nan Zheng, Zengqi Xie, Xiangjian Wan, Xiaodan Zhang, Yongsheng Liu*, and Yongsheng Chen. Spacer Engineering Using Aromatic Formamidinium in 2D/3D Hybrid Perovskites for Highly Efficient Solar Cells. ACS Nano 2021, 15, 7811–7820.

3. Hongtao Lai, Di Lu, Zhiyuan Xu, Nan Zheng, Zengqi Xie, and Yongsheng Liu*. Organic-Salt-Assisted Crystal Growth and Orientation of Quasi-2D Ruddlesden–Popper Perovskites for Solar Cells with Efficiency over 19%. Adv. Mater. 2020, 32, 2001470.

4. Di Lu#, Guangwei Lv#, Zhiyuan Xu, Yixin Dong, Xiaofei Ji, and Yongsheng Liu*. Thiophene-based Two-Dimensional Dion–Jacobson Perovskite Solar Cells with over 15% Efficiency. J. Am. Chem. Soc. 2020, 142, 11114−11122. 

5. Yixing Dong, Di Lu, Zhiyuan Xu, Hongtao Lai, Yongsheng Liu*, 2-Thiopheneformamidinium-Based 2D Ruddlesden-Popper Perovskite Solar Cells with Efficiency of 16.72% and Negligible Hysteresis. Adv. Energy Mater. 2020, 10, 2000694.

6. Zhiyuan Xu, Di Lu, Feng Liu, Hongtao Lai, Xiangjian Wan, Xiaodan Zhang, Yongsheng Liu*, and Yongsheng Chen. Phase Distribution and Carrier Dynamics in Multiple-Ring Aromatic Spacers-Based Two-Dimensional Ruddlesden-Popper Perovskite Solar Cells. ACS Nano, 2020, 14, 4871-4881.

7. Yongsheng Liu and Yongsheng Chen*. Integrated Perovskite/Bulk-Heterojunction Organic Solar Cells. Adv. Mater. 2020, 32, 1805843.

8. Tong Zhou, Hongtao Lai, Tingting Liu, Di Lu, Xiangjian Wan, Xiaodan Zhang, Yongsheng Liu*, and Yongsheng Chen*. Highly Efficient and Stable Solar Cells based on Crystalline Oriented 2D/3D Hybrid Perovskite. Adv. Mater. 2019, 31, 1901242.

9. Hongtao Lai, Bin Kan, Tingting Liu, Nan Zheng, Zengqi Xie, Tong Zhou, Xiangjian Wan, Xiaodan Zhang, Yongsheng Liu*, and Yongsheng Chen*. Two-dimensional Ruddlesden–Popper Perovskite with Nanorod-like Morphology for Solar Cells with Efficiency Exceeding 15%. J. Am. Chem. Soc. 2018, 140, 11639-11646.

10. Dongxue Liu#, Bin Kan#, Xin Ke, Nan Zheng, Zengqi Xie, Di Lu, and Yongsheng Liu*. Extended Conjugation Length of Nonfullerene Acceptors with Improved Planarity via Noncovalent Interactions for High-Performance Organic Solar Cells. Adv. Energy Mater. 2018, 8, 1801618. 

11. Shiqi Dong#, Yongsheng Liu#, *, Ziruo Hong, En-Ping Yao, Pengyu Sun, Lei Meng, Yuze Lin, Jinsong Huang, Gang Li, and Yang Yang*. Unraveling the High Open Circuit Voltage and High Performance of Integrated Perovskite/Organic Bulk-Heterojunction Solar Cells. Nano Lett. 2017, 17, 5140-5147.

12. Yongsheng Liu, Ziruo Hong*, Qi Chen, Huajun Chen, Wei-Hsuan Chang，Yang (Michael) Yang, Tze-Bin Song, Yang Yang*. Perovskite Solar Cells Employing Dopant-Free Organic Hole Transport Materials with Tunable Energy Levels. Adv. Mater., 2016, 28, 440-446.

13. Yongsheng Liu, Ziruo Hong, Qi Chen, Weihsuan Chang, Huanping Zhou, Tze-Bin Song, Eric Young, Yang (Michael) Yang, Jingbi You, Gang Li and Yang Yang*. Integrated Perovskite/Bulk-Heterojunction toward Efficient Solar Cells. Nano Lett. 2015, 15, 662-668.

14. Yongsheng Liu, Yang (Michael) Yang, Chun-Chao Chen, Qi Chen, Letian Dou, Ziruo Hong, Gang Li and Yang Yang*. Solution Processed Small Molecules Using Different Electron Linkers for High Performance Solar Cells. Adv. Mater., 2013, 25, 4657-4662.

15. Yongsheng Liu, Xiangjian Wan*, Fei Wang, Jiaoyan Zhou, Guankui Long, Jianguo Tian, Yongsheng Chen*. High Performance Solar Cells using a Solution Processed Small Molecule Containing Benzodithiophene Unit. Adv. Mater., 2011, 23, 5387-5391.

16. Yongsheng Liu, Xiangjian Wan*, Fei Wang, Jiaoyan Zhou, Guankui Long, Jianguo Tian, Jingbi You, Yang Yang, and Yongsheng Chen*. Spin-coated Small Molecules for High Performance Solar Cells. Adv. Energy Mater., 2011, 1, 771-775.

博士与硕士招生学科：高分子化学与物理
欢迎报考本组博士和硕士研究生，欢迎加入本组做博士后研究。

要求：
1. 具有扎实的有机化学，高分子化学与物理，材料学，器件物理，或光电子学等专业知识背景；
2. 思维活跃、善于思考、吃苦耐劳，有团队精神。
欢迎勤奋、踏实、有激情、有梦想的同学加入我们课题组！

诚招博士后，南开化学支持包括：
1.博士后A档聘任人员基本薪金40万元人民币/年； 博士后B档聘任人员基本薪金25万元人民币/年。
2.享受天津市给予对博士后每人一次性5万元生活补贴。
3.博士后第二聘期结束前，工作业绩突出者可通过岗位评审程序聘为南开大学教师。