Unlocking the potential of metal halide perovskite thermoelectrics through electrical doping: A critical review

IF 10.7 Q1 CHEMISTRY, PHYSICAL EcoMat Pub Date : 2023-08-24 DOI:10.1002/eom2.12406
Yongjin Kim, Hyeonmin Choi, Jonghoon Lee, Young-Kwang Jung, Joonha Jung, Jaeyoon Cho, Takhee Lee, Keehoon Kang
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Abstract

Over the past decade, metal halide perovskites (MHPs) have received great attention, triggered by the tremendous success of their record-breaking power conversion efficiency values in solar cells. Recently, there have been significant interests in fully utilizing their unique properties by exploring other device applications including thermoelectrics, which is promising due to their ultralow thermal conductivity and high mobility relative to their competitors among solution-processable materials. However, the performance of MHP thermoelectrics reported so far falls significantly short of theoretical predictions, as the doping levels achieved to date are typically below the optimum values for maximizing the thermoelectric power factor, indicating the need for effective electrical doping strategies. In this critical review, recent studies aimed at enhancing the thermoelectric properties of MHPs are discussed, with a focus on the relatively under-explored area of electrical doping in MHPs. The underlying charge transport mechanism and doping effect on transport are also examined. Finally, the challenges facing MHP thermoelectrics are highlighted, and potential research visions for achieving highly efficient thermoelectric conversion based on MHPs are offered.

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通过电掺杂释放金属卤化物钙钛矿热电材料的潜力:综述
在过去的十年中,金属卤化物钙钛矿(MHPs)受到了极大的关注,这是由于其在太阳能电池中破纪录的能量转换效率值取得了巨大成功。最近,通过探索包括热电材料在内的其他器件应用,人们对充分利用其独特性能产生了极大的兴趣,热电材料由于其超低导热性和相对于溶液可加工材料的竞争对手的高迁移率而前景广阔。然而,迄今为止报道的MHP热电材料的性能明显低于理论预测,因为迄今为止实现的掺杂水平通常低于最大化热电功率因数的最佳值,这表明需要有效的电掺杂策略。在这篇重要的综述中,讨论了最近旨在提高MHPs热电性能的研究,重点关注了MHPs中电掺杂的相对未被开发的领域。本文还研究了潜在的电荷输运机制和掺杂对输运的影响。最后,强调了MHP热电材料面临的挑战,并提出了基于MHP热电材料实现高效热电转换的潜在研究前景。
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CiteScore
17.30
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0.00%
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审稿时长
4 weeks
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