Stable Perovskite Superlattices: A Novel Path towards High-Stability Top Cells for Perovskite/Si Tandem Solar Cells

Solar energy is the most abundant energy source to generate clean electricity through photovoltaic (PV) technologies to mitigate climate change.

However, solar energy accounts for less than 3% of total energy production at present, mainly produced from crystalline Si (c-Si) cells.

Metal halide perovskite/Si tandem solar cells offer an unprecedented opportunity for increasing power generation with little additional cost.

However, state-of-the-art metal halide perovskite/Si tandem solar cells are limited by poor long-term stability of perovskites.

This proposed project aims to tackle this critical challenge by developing stable perovskite superlattices, a novel structure firmly based on my preliminary results.

Determining the optimal composition and uncovering the fundamental formation mechanism of stable perovskite superlattices will be the most novel part of the project.

Phase stability will be carefully studied with the motivation to achieve perovskite/Si tandems with high efficiency of > 30% and significantly improve the operational lifetime.This project will be implemented at Prof. Henry Snaith’s group at the Department of Physics, the University of Oxford. Prof.

Snaith is the pioneer and world-leading expert in perovskite solar cells and tandems. He will play a crucial role in my personal development into a new research area.

In addition, I will be able to build strong international networks, which are important for my future career development.