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宅西水新蟲 (初入文壇)
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科學(xué)期刊,材料科學(xué)
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Inactive (PbI2)2RbCl stabilizes perovskite films for efficient solar cells 非活性(PbI2)2RbCl穩(wěn)定鈣鈦礦薄膜高效太陽能電池 ▲ 作者:YANG ZHAO, FEI MAZIHAN QU, SHIQI YU, TAO SHEN, HUI-XIONG DENG et al. ▲ 鏈接: https://www.science.org/doi/10.1126/science.abp8873 ▲ 摘要: 在鹵化物鈣鈦礦太陽能電池中,二次相過量碘化鉛(PbI2)的形成對功率轉(zhuǎn)換效率(PCE)有一定的積極影響,但會損害器件的穩(wěn)定性,并在電壓掃描時造成較大的滯后效應(yīng)。 通過RbCl摻雜,我們將PbI2轉(zhuǎn)化為非活性(PbI2)2RbCl化合物,有效地穩(wěn)定了鈣鈦礦相;诖朔椒,我們獲得了FAPbI3鈣鈦礦太陽能電池,其認證功率轉(zhuǎn)換效率PCE為25.6%。在儲存1000小時后,器件保留了96%原始功率轉(zhuǎn)換效率PCE值,在85°C下進行500小時熱穩(wěn)定性測試后,保留了80%原始功率轉(zhuǎn)換效率PCE值。 ▲ Abstract: In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI2) has some positive effects on power conversion efficiency (PCE) but can be detrimental to device stability and lead to large hysteresis effects in voltage sweeps. We converted PbI2 into an inactive (PbI2)2RbCl compound by RbCl doping, which effectively stabilizes the perovskite phase. We obtained a certified PCE of 25.6% for FAPbI3 (FA, formamidinium) perovskite solar cells on the basis of this strategy. Devices retained 96% of their original PCE values after 1000 hours of shelf storage and 80% after 500 hours of thermal stability testing at 85°C. |

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