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凯发k8官方首页研究开发出含反式异构富勒烯吡咯烷添加剂的高效锡基钙钛矿太阳能电池—小柯机器人—科学网

2024-10-11 14:04:52 来源于:凯发国际天生赢家-一触即发

  本文合成了顺式(CPPF)和反式(TPPF)两种吡啶取代的富勒烯吡咯烷(PPF)▼=△,并将其作为前体添加剂◁▷▽…。CPPF和TPPF的空间构型对它们的电子密度分布▼-◆,和与钙钛矿组分的相互作用产生了显着影响▼○▪。与CPPF相比●□◆▽▪,TPPF具有空间分离的吡啶基官能团○△▷☆=▪,这使其能够通过配位键捕获更多的钙钛矿胶体□•-•△,从而减缓钙钛矿的结晶过程▷▪◁。制备的钙钛矿薄膜具有较好的晶体取向和致密性•□•●…▽。

  近日●▲,华侨大学的魏展画&田成波及其研究团队取得一项新进展■•◇▲◆。经过不懈努力▽○▷◁,他们成功开发出含反式异构富勒烯吡咯烷添加剂的高效锡基钙钛矿太阳能电池◁□。相关研究成果已于2024年1月29日在国际知名学术期刊《自然光子学》上发表••□★△•。

  TPPF位于晶界★▽,改善了界面能级排列•◁▽,抑制了Sn2+氧化▼▲◇▼◇。基于TPPF的锡基钙钛矿太阳能电池(TPSCs)表现出极高的功率转换效率(高达15…◇■▼.38%▲△△▷,经认证为15■□▽.14%)和出色的稳定性◁◆●■▼•。在储存3000小时和连续照明500小时后●■•,这些电池仍能保持其初始效率的99%和93%◁◁。这项工作强调了在制备高质量锡基钙钛矿薄膜的过程中▷•,调节前驱体溶液中的配位键的重要性◆■•★▼■。这一发现为制备更高效▽▪•☆、更稳定的TPSCs铺平了道路凯发k8官方首页◇=☆。

  锡基钙钛矿太阳能电池(TPSCs)因其低毒性和高理论效率而备受关注▷□,钙钛矿薄膜生长的可控性差和Sn2+容易氧化的问题●◇•,然而◆★,被视为无铅光伏技术的优秀候选者之一…▲◁。据悉凯发k8官方首页□☆-◆,导致TPSCs的效率和稳定性远不及铅基钙钛矿太阳能电池▷□…△•▽。

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