Key Findings
A team led by Academician Yongfang Li and Researcher Lei Meng from the Chinese Academy of Sciences Institute of Chemistry has established a new world record for perovskite-organic tandem solar cells, achieving a certified steady-state power conversion efficiency (PCE) of 28.04%. This groundbreaking achievement, reported in ‘Nature,’ demonstrates superior performance by combining two solution-processable semiconductor materials. Notably, the cell exhibited excellent stability, retaining 90% of its initial efficiency after 625 hours of continuous illumination. This marks a significant advancement in addressing the critical challenge of durability for the commercialization of perovskite solar cells.
Technical Details
This new record was achieved through the meticulous optimization of a tandem structure incorporating perovskite and organic semiconductor layers. The research team precisely controlled the material selection and interfacial engineering of each layer, leading to highly efficient charge transport and minimized energy losses. The integration of organic materials, in particular, proved effective in passivating defects within the perovskite layer and broadening the light absorption spectrum. The fabrication process for these cells is solution-based, allowing for near-room-temperature manufacturing. This offers substantial energy consumption and cost reductions compared to traditional silicon solar cell production. Furthermore, compatibility with roll-to-roll printing technology has been demonstrated, opening avenues for future large-scale and low-cost manufacturing.
Background & Context
Perovskite solar cells are emerging as a next-generation technology with the potential to surpass the theoretical efficiency limits of silicon solar cells. The tandem structure with organic materials specifically enables the development of flexible and lightweight devices, which are highly anticipated for new market segments such as Building-Integrated Photovoltaics (BIPV) and wearable electronics. China has been at the forefront of perovskite solar cell research and development globally, and this new world record reaffirms its technological leadership. While long-term stability has historically been a challenge for perovskite solar cells, the demonstrated 90% efficiency retention after 625 hours in this study represents a crucial step towards overcoming this hurdle and significantly boosts commercialization prospects.
Strategic Significance & Outlook
The combination of 28.04% high efficiency, excellent stability, and solution-processable manufacturing technology is set to accelerate the commercialization of perovskite-organic tandem solar cells. If large-scale manufacturing via roll-to-roll printing becomes feasible, it could dramatically reduce production costs, contributing significantly to the widespread adoption of renewable energy. This achievement by the Chinese Academy of Sciences further elevates China’s role in the global clean energy transition. Future efforts will focus on further R&D and validating the durability and scalability of this technology for practical implementation, with market entry expected within the next few years.
Source: https://pandaily.com/cas-perovskite-organic-tandem-solar-cell-record-28-04-percent-aug2026
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