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The solar cell is made of graphite and carbon black from Beijing Deke Nanotechnology Co., Ltd. and Titan Technology Co., Ltd α- Terpene alcohol, advanced electronic

Lead(II) iodide (PbI2) and Methyl Ammonium Halide (CH3NH3I) were made into Technology Co., Ltd., 5-ammonium valerate iodine (5-AVAI) and titanium oxide (TiO2) from GreatCell small OLAR, Zirconium dioxide (ZrO2 from WonderSolar Co., Ltd., and paste) γ Butyrolactone (GBL) comes from AcrosOrganics. The carbon powder used here is obtained from our own office, and the scientist explained that all materials are used as is without further purification.

The carbon paste used for electrodes is made of 5.6 grams of waste toner carbon powder and graphite, 1.06 grams of ZrO2, and 0.8 grams of ethyl cellulose, dispersed in 15 grams α- Terpineol. The weight content of the four samples is 5% by weight, 10% by weight, 17% by weight, and 23% by weight, respectively.

The changes in the amount of carbon paste have different effects on the performance of solar cells, as they significantly alter the electrode morphology, charge recombination, hydrophobicity, work function, and conductivity. Therefore, when the weight content of waste carbon powder is 10%, the Solar-cell efficiency (PCE) is as high as 11.78%. The Chinese team said that the best performance depends on the electrode morphology and hydrophobic characteristics, in which the diversion affects the injection of perovskite precursors, crystal formation, suppression of charge recombination, and charge extraction and collection.

The proposed technology is described in the paper "Photovoltaic green application of waste energy carbon non fully printable", which was recently published in Solar Energy. Scientists claim that this new technology opens up a new path for the green application of waste carbon powder.

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