Yantao Shi 

Emerging thin film technology

Department  of  Chemistry,  School  of  Chemical  Engineering,  Dalian University  of Technology 

Email: shiyantao@dlut.edu.cn 

Biography

Affiliation: Department of Chemistry, School of Chemical Engineering, Dalian University of Technology

Address:  No. 2 Linggong Road High-Tech Zone, Dalian, P.R.C, 116024

Phone: +86-411-84986237      

E-mail: shiyantao@dlut.edu.cn

Education/Careers;

2001 ~ 2005 B.S. in Chemistry, Lanzhou University

2005 ~ 2007 M.S. in Materials Physics and Chemistry, Tsinghua University

2007 ~ 2010 Ph.D. in Physical Chemistry, Tsinghua University

2010 ~ 2012 Postdoctoral Fellow, Hong Kong University of Science and Technology

2012 ~ 2013 Assistant professor of Dalian University of Technology

2013 ~ 2016 Associate professor of Dalian University of Technology

2016 ~ presentProfessor of Dalian University of Technology

Research Interest:

1)  The third generation solar cells  

2)  Electrocatalysts and photocatalysts, single atom catalysis  

Representative Publications

1)  Ti1–graphene  single-atom  material  for  improved  energy  level  alignment  in  perovskite solar cells, Nature Energy, 2021, 6, 1154 - 1163.

2) Flexible  perovskite  solar  cells  with  simultaneously  improved  efficiency,  operational stability, and mechanical reliability, Joule, 2021, 5, 1587 - 1601.

3) Interpenetrating interfaces for efficient perovskite solar cells with high operational stability and mechanical robustness, Nature Communications, 2021, 12, 973.

4)  CNT-based  bifacial  perovskite  solar  cells  toward  highly  efficient  4-terminal  tandem photovoltaics, Energy & Environmental Science, 2022, 15, 1536-1544. 

Abstract for Presentation

2D perovskite layer for mechanical enhancement and defect passivation of high efficiency flexible solar cells  

While great progress is being made  towards  improving  the  power conversion efficiency (PCE) and the operational stability of perovskite solar cells (PSCs), little attention is being paid to their mechanical reliability, which is particularly important in the case of flexible PSCs (f-PCSs). Here we have grown in situ low-dimensional (LD) metal halide perovskite (MHP) thin capping layer over the 3D MHP light-absorber thin film  in  f-PSCs  to  improve  their  mechanical  reliability.  This  results  in  f-PSCs  with unprecedented, simultaneous improvements in PCE (21.0%), operational stability (T90 800 h), and bending durability (T80 20,000 tension-only bendingcycles), where T90 and T80  refer  to  retention  of  90%  and  80%,  respectively, of  theinitial PCE. These synergistic  virtuous  effects  are  attributed  to  the  LD  MHP  capping  layer  enhancing photocarriers  extraction,  providing  protection  against  the  environment,  and  'sealing' surface flaws on the 3D MHP thin film. The latter reduces the propensity for cracking in bending, which results in improved environmental stability and bending durability. 

References

[1] Qingshun Dong, Min Chen, Yuhuang Liu, Felix T. Eickemeyer, Weidong Zhao, Zhenghong Dai, Yanfeng  Yin,  Chen  Jiang,  Jiangshan  Feng,  Shengye  Jin,  Shengzhong  (Frank)  Liu,  Shaik  M. Zakeeruddin; Michael Gratzel, Nitin P. Padture*, Yantao Shi*, Flexible perovskite solar cells with simultaneously  improved  efficiency,  operational  stability,  and mechanical  reliability,  Joule, 2021, 5(6), 1587-1601.