by Riko Seibo
Tokyo, Japan (SPX) Feb 08, 2026
Researchers from the Qingdao Institute of Bioenergy and Bioprocess Know-how (QIBEBT) of the Chinese language Academy of Sciences have reported a brand new interface engineering technique that considerably boosts the effectivity and stability of three dimensional perovskite photo voltaic cells.
Working with worldwide companions, the group fashioned a skinny two dimensional perovskite section on the buried interface of the perovskite absorber, a location that has been troublesome to focus on selectively with earlier approaches.
The work, revealed in Nature Power on February 6, reveals that the tactic improves the crystallization high quality of the perovskite movies and cuts defect concentrations at buried interfaces by greater than 90 %, a tenfold lower.
Defects on the high and backside surfaces of perovskite layers stay a serious bottleneck for each photovoltaic efficiency and long run stability in perovskite photo voltaic cells.
One recognized technique is to include lengthy chain ammonium salts into the majority perovskite, which might generate two dimensional perovskite phases within the bulk and at buried interfaces.
Nevertheless, earlier methods have struggled to restrict these two dimensional buildings solely to the buried interface, the place they’ll passivate defects with out disrupting cost transport in the remainder of the absorber.
To beat this, the QIBEBT led group sequentially grafted thioglycolic acid and oleylamine onto the floor of tin dioxide nanoparticles, producing a modified electron transport materials known as SnO2-TGA-OAm.
Sturdy chemical bonding between the thioglycolic acid and oleylamine on the nanoparticle floor controls how the perovskite precursor interacts with the interface throughout movie formation.
Throughout thermal annealing of the perovskite movie, cation alternate between the grafted layer and formamidinium iodide proceeds within the strong state, triggering the spontaneous formation of a two dimensional three dimensional perovskite heterostructure solely on the backside interface.
The ensuing SnO2-TGA-OAm layer acts as a multifunctional electron transporting layer that each extracts cost carriers effectively and passivates defects on the buried contact.
Gadgets constructed with this engineered interface achieved energy conversion efficiencies of 26.19 % for small space cells with an energetic space of 0.09 sq. centimeters.
The researchers additionally demonstrated a module with an aperture space of 21.54 sq. centimeters that reached an influence conversion effectivity of 23.44 % and was licensed at 22.68 %.
As well as, a big space module with an aperture space of 64.80 sq. centimeters delivered an effectivity of twenty-two.22 %, underscoring the scalability of the interface design from small cells to modules.
“These values rank among the many highest efficiencies reported to this point for small sized PSCs and modules based mostly on 2D/3D perovskite heterojunctions,” mentioned first creator Dr. Zhao Qiangqiang of QIBEBT.
“This in situ strong state ligand alternate technique could possibly be simply scalable from lab to manufacturing unit manufacturing whereas delivering enhanced operational stability,” added corresponding creator Prof. Pang Shuping.
In accordance with the group, the mix of excessive effectivity, lowered interfacial defects, and improved operational stability brings the commercialization of perovskite photo voltaic cells nearer to actuality.
The examine demonstrates a normal route for fabricating 2D/3D heterojunctions particularly at buried interfaces of perovskite absorbers, a functionality that’s anticipated to help additional efficiency positive factors in perovskite photovoltaic expertise.
Analysis Report:Buried 2D/3D heterojunction in n-i-p perovskite solar cells through solid-state ligand-exchange reaction
Associated Hyperlinks
Qingdao Institute of Bioenergy and Bioprocess Technology
All About Solar Energy at SolarDaily.com
