This course on Hybrid Perovskite Solar Cells aims to explore the opportunities and challenges in the field. The learning outcomes include understanding the working principle of photovoltaics, mastering the solution processing technique for growing high-quality semiconductor thin films, and analyzing the performance of photovoltaic devices. The course covers topics such as film characterization, device performance, stability issues, and the comparison between 3D and 2D perovskites. The teaching method involves a lecture-style presentation with a focus on experimental results and theoretical modeling. The course is intended for researchers, scientists, and professionals interested in the development and optimization of hybrid perovskite solar cells.
Overview
Syllabus
Hybrid perovskite solar cells: Opportunities and challenges
Acknowledgements
Topics
Photovoltaics: Working principle P-N junction with light shining on it!
Motivation
Transport in nanostructured thin-films
Our strategy
Hybrid perovskites: A solution processed high quality semiconductor
Challenges in the field...
c-Si solar cell efficiency over 60 years
Other advantages of growing crystals
Higher boiling point solvents
Film Characterization
Photovoltaic device performance
Efficiency Vs Grain-size
Reproducible and hysteresis free
Nio, as hole transport layer
Evidence for suppressed recombination
Optical properties
Pure bimolecular recombination
Stability is an critical issue....
Our experiment
Device performance with constant illumination
Charge injection does not degradation- Light-activation required
No evidence for structural degradation
Evidence for trapped charge
Photocurrent transient measurements
Recovery of PL signal at RT
Light-induced formation of trap states
Evidence for formation of sub-bandgap states
Formation of light-activated trap states
Fast photocurrent recovery in dark
Photocurrent recovery and temperature dependence of efficiency
What are layered perovskites?
Challenges in layered perovskite
What about layered 2D perovskites? (in collaboration with Kanatzidis group Northwestern)
Breakthrough efficiency in planar geometry
Hysteresis tests
Stability of 3D vs. 2D perovskites
Summary
Taught by
Materials Research Society
