将阳光"一分为二" 硅太阳能电池中实现稳定"单线态裂分"效应

Core Insights - A research team from the University of New South Wales in Australia has achieved a significant breakthrough in solar technology by discovering a stable organic material that enables the "singlet fission" effect in silicon solar cells, potentially enhancing photovoltaic conversion efficiency [1][3] Group 1: Technology Breakthrough - The "singlet fission" process allows a single photon to split into two energy packets, effectively converting wasted thermal energy from sunlight into additional electricity [3] - By overlaying a thin layer of organic molecules on the surface of silicon cells, high-energy photons can undergo fission, generating two lower-energy excited states and injecting more charge into the silicon layer, significantly increasing current output [3] Group 2: Efficiency Potential - Current commercial silicon solar cells have a maximum conversion efficiency of approximately 27%, with a theoretical limit of 29.4%. The introduction of the "singlet fission" mechanism could potentially raise this theoretical efficiency to 45% [3] - The research team utilized dibenzothiophene-dione (DPND), a stable industrial pigment, which demonstrates excellent durability and compatibility with silicon cells, allowing for long-term outdoor application [3] Group 3: Practical Application - This is the first instance of achieving singlet fission on silicon materials using a stable organic molecule based on industrial pigments, which are already widely used in automotive coatings, indicating sufficient chemical stability for outdoor use [3] - The technology can be integrated by simply applying a new layer of material onto existing silicon cells, facilitating easier adoption in the market [3]