(a) KPFM sampling illustration, 2-dimensional KPFM potential picture and (b) topography picture of the donor/acceptor stacked NC movies. For KPFM measurements, the donor NC ink was first spin-coated onto the ITO substrate, adopted by dynamic spin casting of the acceptor NC ink from the sting of the movie to determine the potential distinction between the donor and acceptor NCs. Credit score: Superior Power Supplies (2025). DOI: 10.1002/Aenm.202404552
A analysis workforce has developed a expertise that may considerably improve the effectivity of eco-friendly photo voltaic cells. The photo voltaic cells they developed confirmed elevated energy conversion effectivity of as much as 8.26%, in contrast with standard photo voltaic cells. This discovering is anticipated to speed up the commercialization of next-generation eco-friendly photo voltaic cells.
The analysis is published within the journal Superior Power Supplies.
Silver bismuth sulfide (AgBiS2) nanocrystals have lately attracted consideration as an eco-friendly photo voltaic cell materials. Current high-efficiency solar cells comprise dangerous heavy metals equivalent to lead and cadmium, inflicting environmental air pollution, however silver bismuth sulfide has the benefit of being non-toxic and ample in uncooked supplies. Nonetheless, its limitation is that when it exceeds a sure thickness, electricity doesn’t circulate properly, inflicting a pointy drop in effectivity.
To unravel this drawback, the analysis workforce developed a skinny movie with a particular blended construction to permit electrical energy to circulate higher. In different phrases, they blended supplies to create a layer that improves the circulate of electrical energy. The workforce chemically handled silver bismuth sulfide nanocrystals to offer completely different properties (donor and acceptor) to 1 layer, permitting electrical energy to maneuver extra effectively inside.
Consequently, after they made a 65 nm (nanometer) light-absorbing layer twice as thick as the traditional ones, its efficiency was maintained and the effectivity of the photo voltaic cell was improved by 8.26%. That is equal to charging a smartphone 4 to 5 instances or retaining an LED mild bulb on for over two hours longer.
“This research has greatly increased the charge diffusion length by allowing the donor and acceptor to coexist in the same layer of the AgBiS2 solar cell, thus maintaining performance even in thicker layers,” mentioned Prof. Choi Jong-min of DGIST’s Division of Power Science and Engineering. “We expect this eco-friendly technology to be applied to various high-efficiency solar cells in the future.”
This joint analysis between DGIST Prof. Choi’s workforce and UNIST Prof. Kwon Oh-hoon’s workforce was led by DGIST Power Science and Engineering college students Kim Hae-jung and Park Jin-young, and UNIST mixed Grasp’s and doctoral program pupil Choi Ye-jin.
Extra data:
Hae Jeong Kim et al, Homogeneously Blended Donor and Acceptor AgBiS2 Nanocrystal Inks Allow Excessive‐Efficiency Eco‐Pleasant Photo voltaic Cells with Enhanced Service Diffusion Size, Superior Power Supplies (2025). DOI: 10.1002/Aenm.202404552
Quotation:
8.26% effectivity increase in eco-friendly photo voltaic cells achieved, advancing commercialization prospects (2025, March 24)
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