Unlocking the Potential of Perovskite Solar Cells: From Single-Junction to Tandem
Yi Hou b
a Department of Chemical and Biomolecular Engineering, National University of Singapore, Engineering Drive 3, 1, Singapore, Singapore
b Solar Energy Research Institute of Singapore (SERIS), National University of Singapore
Proceedings of Asia-Pacific Conference on Perovskite, Organic Photovoltaics&Optoelectronics (IPEROP25)
Kyoto, Japan, 2025 January 19th - 21st
Organizers: Atsushi Wakamiya and Hideo Ohkita
Invited Speaker, Yi Hou, presentation 002
Publication date: 4th October 2024

Inverted perovskite solar cells (PSCs) show great promise both as standalone technology and in tandem with silicon. However, the commercialization of cutting-edge inverted PSCs faces two major challenges: interface recombination losses and degradation. To tackle these issues, we have developed novel interface materials and innovative device design concepts. Our recent research represents a breakthrough, with our inverted PSCs achieving record-breaking performance. Specifically, we have reached a certified steady-state efficiency of over 24.0% for a 1 cm² active area, surpassing conventional designs.

In this presentation, I will explore the rationale behind the inverted perovskite design and discuss our strategies for unlocking its full potential in various tandem configurations. I will highlight the advantages of this technology and its future prospects, including the design of wide-bandgap perovskites to achieve record performances in perovskite/CIGS (~30%, 4T) and triple-junction perovskite/perovskite/Si tandems (>27%, NREL certified). I will also explain how perovskite-based tandem solar cells have achieved high efficiencies and demonstrate the vast potential of integrating traditional PV and perovskite technologies in tandem devices.

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