An international team of researchers led by King Abdullah University of Science and Technology has manufactured a triple junction perovskiet-Perovskite-Silicon tandem solar cell that achieved a world record efficiency for this cell architecture. The device contains stabilized perovskites that ensure improved performance and stability.
Researchers from the King Abdullah University of Science and Technology (Kaust) in Saudi Arabia have a triple junction perovskite-perovskite-silicon tandem cell manufactured with stabilized perovskite layers that have a power covers efficiency of 28.7% of 28.7%. It is a new efficiency record for this type of cell, according to the research team.
The research team noted that the high-quality potential of such triple junction cells still has to be achieved due to well-documented problems with the 1.50-Ev Formamidinium lead triiodide (FAPBI3)-based middle layer and the 2.0-Ev-rich (BR-rich) top layer. The first usually suffers during subsequent steps from the solar cells and the latter suffers from phasegregation due to slightly induced phasegregation.
“First of all, we systematically defined the different phasegradation mechanisms in various perovskiet samples as a uniform phase instability framework, fundamental driven by phase transitions and ionmigration, said Stefaan de Wolf, corresponding author, said PV -Magazine.
“To tackle this, we introduced 3-amonium propionic acid (3a⁺) into the perovskiet schedule, which forms several ionic and hydrogen bonds. This structural modification increased the phase transition energy barries considerably and suppressed the formation of Facilitan,” he said.
The group reported that the effects of the modification “simultaneously” inhibit both the breakdown in the 1.5 EV perovskites and the light-induced phasegregation of 2.0 EV perovskites.
“In addition, the carboxyl group in 3A⁺ strongly interacts with the buried interface, an self-assembled Monolaag (SAM), which improves electronic cloud coupling and promotes more efficient charging transport,” De Wolf explained.
In the study, the researchers also tested the ammonium modification on connecting cells from Tin Lead (SN-PB) with a narrow band gap of approximately 1.25 EV.
After testing, the team of reduced bulk job formation and improved efficiency of the monster perovskiet solar cells, “including SN-PB narrow-band gap, fapbi3-based central band gap and BR-rich broad-band gap compositions,” says De Wolf.
“Door deze gestabiliseerde Perovskites op te nemen in triple-junction-apparaten, hebben we een efficiëntie van 28,7% bereikt voor Perovskite/Perovskite/Silicon-tandems, die een nieuw efficiëntie-record vertegenwoordigen in het veld,” verklaarde de Wolf, “verklaarde dat zowel stabiliteit als de reproductie van de apparaten een duidelijk geïnfiseerd was, met de apparaten die meer Then 85% of the initial efficiency were, with the devices that were more than 85% of the initial efficiency, with the devices that were more than 85% of the initial efficiency, with the devices that were more than 85% of the initial efficiency, with the devices that were more than 85% of the initial efficiency, with the initial efficiency.
“These results not only push the limits of the efficiency of triple junction solar cells, but also offer a generalizable strategy for improving the phase stability of perovskietabsorbers, an essential step in the direction of their industrial effort,” De Wolf said.
Details of the research are described in “Stabilized perovskiet phases that make it possible to make perovskiet/perovskiet/silicon triple junction solidly possible“Published in natural materials. Researchers at Marmara University in Turkey and Ludwig Maximilians Universität (LMU) in Germany also participated in the study.
Looking ahead, the team will continue to push the efficiency of Triple junction perovskiet-based solar cells beyond the limit with a single-junction Shockley-quisser, “through extensive material and device innovations, according to the Wolf.
The group is planning to concentrate in particular on optimizing the Top Perovskiet subcel, including new broad-band gap compositions and refined interface designs, to minimize losses and improve the overall performance.
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