Improved polymer additive enhances perovskite photo voltaic cells
by Simon Mansfield
Sydney, Australia (SPX) Might 16, 2024
Perovskite photo voltaic cells, identified for his or her light-weight and versatile nature, are cheap and simple to fabricate. They’re seen as a promising expertise that may be hooked up to varied surfaces. Nonetheless, these photo voltaic cells at present lack sturdiness and effectivity. New analysis highlights how including a polymerized ionic liquid to the steel halide perovskite materials can enhance their efficiency, probably facilitating wider adoption of perovskite photo voltaic cells.
“The generally employed resolution processing technique for fabricating perovskite layers introduces many defects in each the majority and floor of the perovskite layer. These intrinsic defects inside the perovskite absorption layer pose a big constraint on the general efficiency of the units. Additive engineering has been demonstrated to be efficient as a technique for defect passivation and efficiency enhancement in perovskite photo voltaic cells,” mentioned Qi Cao, a researcher at Northwestern Polytechnical College in Xi’an, China.
Researchers are enhancing the properties of ionic liquids by creating polymerized variations. On this research, they synthesized a poly ionic liquid known as poly4-styrenesulfonyl(trifluoremethylsulfonyl)imidepyridine (PSTSIPPyri).
The addition of PSTSIPPyri to the perovskite photo voltaic cell helps stop halide ion migration, maintains the crystal construction, and improves the photo voltaic cell’s stability by fixing natural and halide ions.
“Thus far, researchers have devoted appreciable consideration to the meticulous number of components that improve the efficiency of perovskite photo voltaic cells. Amongst these, ionic liquids have acquired widespread consideration. Ionic bonds in ionic liquids are typically stronger and extra secure, they usually supply varied tunable properties, together with viscosity, polarity, and conductivity,” mentioned Xuanhua Li, a researcher at Northwestern Polytechnical College. “This tunability makes it doable to fine-tune the ionic liquid properties to satisfy the particular necessities of the perovskite movie, thereby optimizing system efficiency.”
Testing of the PSTSIPPyri additive concerned growing older perovskite movies for 300 hours at 85C and 60% relative humidity. The improved perovskite movie confirmed a slower fee of change than the management movie. It additionally retained 84.5% of its effectivity after 1000 hours in a excessive humidity, excessive warmth atmosphere, in comparison with 43.6% for the management.
Lengthy-term sturdiness assessments confirmed that with PSTSIPPyri, the perovskite photo voltaic cell maintained 87.6% of its energy conversion effectivity after 1,500 hours of steady mild, whereas the management solely maintained 61.1%.
“Incorporating PSTSIPPyri as an additive results in a big enhancement within the energy conversion effectivity of inverted perovskite photo voltaic cells from 22.06% to 24.62%. In addition they reveal glorious long-term operational stability,” mentioned Cao. “This technique illustrates the potential of poly ionic liquids as a promising additive for perovskite photo voltaic cells, providing each excessive efficiency and stability.”
Different contributors embody Xingyuan Chen, Tong Wang, Jiabao Yang, Xingyu Pu, Hui Chen, Bingxiu Xue, and Jianbo Yin at Northwestern Polytechnical College in Xi’an, China; Lengthy Jiang on the CNPC Tubular Items Analysis Institute in Xi’an, China.
Analysis Report:Effectivity enhancement to 24.62% in inverted perovskite photo voltaic cells by way of poly (ionic liquid) bulk modification
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