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<p>Layered hybrid organic–inorganic perovskites offer a unique platform to engineer thermal, mechanical, and spintronic properties through molecular design. This perspective highlights recent advances in characterizing and tuning thermal conductivity and elastic modulus in layered hybrid metal halide perovskites with emphasis on measurement methodologies and the interplay among molecular structure, dynamics, and materials properties. We discuss how organic cations in the perovskites modulate their thermal transport and mechanical behavior, and introduce the emergence of chiral phonons and the recently discovered chiral-phonon-activated spin Seebeck effect in them. These insights reveal pathways to decouple thermal and mechanical properties and enable spin functionality. We conclude by outlining future directions for advancing fundamental understandings and unlocking new functionalities in layered hybrid perovskites <i>via</i> molecular engineering.</p> Graphic abstract <p></p>

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Molecular engineering in layered metal halide hybrid perovskites for tunable thermal conductivity, elastic modulus, and beyond

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月10日

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  • Aryan Jouneghaninaseri,
  • Shengjia Zhang,
  • Qing Tu,
  • Jun Liu

摘要

Layered hybrid organic–inorganic perovskites offer a unique platform to engineer thermal, mechanical, and spintronic properties through molecular design. This perspective highlights recent advances in characterizing and tuning thermal conductivity and elastic modulus in layered hybrid metal halide perovskites with emphasis on measurement methodologies and the interplay among molecular structure, dynamics, and materials properties. We discuss how organic cations in the perovskites modulate their thermal transport and mechanical behavior, and introduce the emergence of chiral phonons and the recently discovered chiral-phonon-activated spin Seebeck effect in them. These insights reveal pathways to decouple thermal and mechanical properties and enable spin functionality. We conclude by outlining future directions for advancing fundamental understandings and unlocking new functionalities in layered hybrid perovskites via molecular engineering.

Graphic abstract