An international research team has built an indoor perovk site PV device using a triple passion treatment to reduce crystal defects in the perovskiet film. The cell achieved remarkable efficiency and was also able to maintain 92% of his initial performance after 3,200 hours.
A group of researchers led by University College London has manufactured a perovskite in the solar cell that is claimed to be more efficient than the best commercially available indoor solar cells.
Considered for applications in keyboards, remote controls, alarms and sensors, the device was manufactured with what the scientists described as triple passiveness treatments (TPT) focused on reducing crystal defects in the perovskiet film.
“The solar cell with these small defects is like a cake that is cut into pieces,” said the main author Die Huang simple. “Through a combination of strategies, we have put this cake together again, making it easier for the load to pass through. The three ingredients that we have added had a synergistic effect and produced a combined effect that is greater than the sum of the parts.”
The triple strategy consisted of the use of three different chemicals, namely Rubidium chloride (RBCL), N“N-Dimethyloctylammonium Jodide (DMOAI) and Fenethylammonium chloride (PeaCl), to enable the growth of perovskiet crystals with minimal tribes.
“De toevoeging van RBCL bevordert een uniforme kristalgroei, verlicht de lokale roosterstam en passiveert energiebarrières in de buurt van de interface van de perovskietcontact, terwijl DMOAI en PEACL bulk- en oppervlakte-defecten onderdrukken, evenals foto-geïnduceerde halide-fase-fasen, die niet worden toegevoegd, die hen aan het stabiliseren en brome en brome en have added Pauw, which they have not added and a break are added and a break are added and Breomide ions, hindering the stabilization and brome and bromide of migrating and in different phases that disrupt the load of the material.
For the celabsorber they used a perovskiet material that is known as FA0.64Ma0.36PB (i0.64Brick0.36))3With an energy band gap of 1.75 EV.
The researchers used X -ray fraction (XRD) to evaluate the impact of the proposed triple passion strategy on the crystal structure and quality of perovskiet films. “In comparison with the control films, the films only-passivated by DMOAI showed 2.7 times higher PL intensity, while those of the target films increased 3.6 times, which shows that TPT effectively passes,” they emphasized.
Tested under standard interior lighting conditions, the solar cell achieved a power conversion -efficiency of 37.6%. It also turned out to be 92% of its initial efficiency after being stored at room temperature and 5-10% relative humidity, compared to a control perovskiet device built without TPT that only 76% of the initial performance retained.
“In a hard test of 300 hours of continuous intense light at 55 ° C, the new solar cells retained 76% of their performance, while the control device fell to 47%,” the research team further explained.
The details of the PV device can be found in the study “Improving the photovoltaic efficiency indoors to 37.6% through triple passivation and re -assembling and N-Type to P-Type modulation in wide bandgap perovskites“Published in Advanced functional materials. The research team included China’s academics Ordos New Energy Research InstituteImperial College London, London South Bank University, Ecole Polytechnique Fédérale de Lausanne (EPFL) from Switzerland, the Swiss, and Chinese startup Phoenixolar Co. Ltd.
“Our TPT grant strategy is a powerful approach to suppress non-rays recombination, to minimize halidase control and to improve both efficiency and long-term stability of broad bandgap perovskite solar cells for I-PV applications,” they concluded.
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