Ultrafast Dynamics Group
Frédéric Laquai's Group


Yajun Gao

Postdoctoral Fellows

Research Interests

​- Optical Properties of Perovskite semiconductors
-The role of traps in the device performance
-Trasport of carriers in the active layer

Selected Publications

Yajun Gao, Roderick C. I. MacKenzie*, Yang Liu, Bin Xu, Paul H.M. van Loosdrecht*, Wenjing Tian*,“Engineering Ultra Long Charge Carrier Lifetimes in Organic Electronic Devices at Room Temperature”. Advanced Materials Interfaces, 2015, 2, 4     

Yajun Gao, Almantas Pivrikas, Bin Xu, Yang Liu, Weiqing Xu, Paul H.M. van Loosdrecht*, Wenjing Tian*.,“Measuring electron and hole mobilities in organic systems: charge selective CELIV”. Synthetic Metals, 2015, 203, 187-191.     

Shanpeng Wen*, Chen Wang, Pengfei Ma, Ge Wang, Wei Dong, Yajun Gao*, Shengping Ruan*,“Improved Efficiency in Dithieno [3,2-b:2′,3′-d] silole-Based Polymer Solar Cells by the Insertion of ZnO Optical Spacer”. The Journal of Physical Chemistry C, 2015, 119, 20817-20822.
Yajun Gao, Weichun Zhang, Xinglong Wu* et al.,“Hydrothermal self-assembling of ZnO nanorods into sphere-like superstructures and their optical characteristics”. Applied Surface Science, 2008, 255, 1982-1987.
Yang Liu, Yajun Gao, Bin Xu*, Paul. H. M. van Loosdrecht*, and Wenjing Tian*,”Trap-limited Bimolecular Recombination in Poly(3-hexylthiophene):Fullerene​ 


2010-2015, PhD student in Zernike Institute for Advanced Materials, University of Groningen, the Netherlands
2004-2007, Master student in Department of Physics, Nanjing University, P.R.China
1999-2003, Bachelor student in College of Physics and Electronic Engineering, Shanxi University, P.R.China

Professional Profile

2015-2017, Research assistant in 2nd Institute of Physics, University of Cologne, Cologne