Designing low‐dimensional halide perovskites (LDHPs) for broadband emissions with enhanced emission and preferred chromaticity coordinator or color temperature remains a pressing challenge. Herein, a comprehensive study is conducted about the relationship between the crystal structure and broadband emission properties of 1D halide perovskite C₄N₂H₁₄PbBr₄, one of promising white‐emission LDHPs. It is found that the zigzag distortion degree tuned by pressure not only suppresses the general photoluminescence quenching, but also effectively adjusts the chromaticity coordinator and color temperature of C₄N₂H₁₄PbBr₄ nanocrystals (NCs). The initially broad white emissive C₄N₂H₁₄PbBr₄ NCs can be continuously modulated to a very bright bluish‐white emission with high color‐rendering index of 86, accompanied by a significant emission enhancement. The underlying mechanism of thus pressure‐induced emission enhancement (PIEE) can be attributed to the strengthening of electron–phonon interactions of compressed C₄N₂H₁₄PbBr₄ NCs. Furthermore, the zigzag distortion of [PbBr₄²⁻]_∞ octahedral chains is able to rearrange the depths of multiple self‐trapped states, which is also corroborated by the wavelength‐dependent decay times under pressure, ultimately giving rise to adjustable emission chromaticity. This study offers a deep insight into the relationship between PIEE and distortion degree of LDHPs at extremes and facilitates the design of new materials with the desired emission properties.

中文翻译：

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高压下一维卤化物钙钛矿中的可调色温和发射增强

设计低维卤化物钙钛矿（LDHP）以提高发射效率和首选色度协调器或色温来实现宽带发射仍然是一个紧迫的挑战。在此，对有希望的白发射LDHPs一维卤化物钙钛矿C ₄ N ₂ H ₁₄ PbBr ₄的晶体结构与宽带发射特性之间的关系进行了全面研究。发现通过压力调节的Z字形畸变度不仅抑制了一般的光致发光猝灭，而且有效地调节了C ₄ N ₂ H ₁₄ PbBr ₄的色度配位体和色温。纳米晶体（NCs）。最初可以发射白光的C ₄ N ₂ H ₁₄ PbBr ₄ NC连续发光体，可以连续调制为非常明亮的蓝白色发射光，显色指数高达86，同时具有显着的发射增强效果。因此，压力诱导发射增强（PIEE）的潜在机理可以归因于压缩的C ₄ N ₂ H ₁₄ PbBr ₄ NCs的电子-声子相互作用的增强。此外，锯齿形失真[PbBr ₄ ^2- ] _∞八面体链能够重新排列多个自陷状态的深度，这也受到压力下与波长有关的衰减时间的证实，最终导致可调节的发射色度。这项研究对PIEE和LDHP极限变形程度之间的关系提供了深入的了解，并有助于设计具有所需发射特性的新材料。