环境条件下水相制备 CsPbBr3 钙钛矿纳米晶
Aqueous Preparation of CsPbBr3 Perovskite Nanocrystals Under Ambient Conditio
AI总结：
本文提出一种室温、空气环境下使用水基溶剂合成尺寸可控 CsPbBr3 钙钛矿纳米晶的绿色方法，PLQY 超 60%，光电探测器 D* 达 1.2×10^11 Jones。
摘要：
金属卤化物钙钛矿（MHPs）对众多新兴光电技术产生了深远影响，其性能指标可媲美甚至超越现有材料。这种影响源于 MHPs 的优异性质，包括可调带隙、高吸收系数、较长的载流子扩散长度，以及简便的合成方法。然而，当前 MHP 的生产依赖有毒溶剂，会带来显著的环境和健康风险。此外，这些方法通常需要复杂的多组分溶剂体系和热处理才能获得所需的物相，进一步限制了可扩展性和可持续性。克服这些挑战对于基于 MHP 的技术的未来发展至关重要。在此，我们提出了一种新型水基溶剂体系和合成方法，可在环境空气和室温条件下制备尺寸可控的 CsPbBr3 钙钛矿纳米晶。CsPbBr3 钙钛矿纳米晶（PNCs）的光致发光量子产率（PLQY）超过 60%。为证明 PNCs 的光到电流转换能力，我们制备了一系列光电导体，其中性能最佳的器件实现了 1.2 × 10^11 Jones 的比探测率（D*）。因此，这种绿色、可扩展且低成本的方法为 MHP 纳米晶的精确尺寸和组成控制提供了一条可持续途径，并为环境友好型光电应用开辟了新的可能。
英文摘要：
Metal halide perovskites (MHPs) have had a profound impact on numerous emerging optoelectronic technologies, achieving performance metrics that rival or exceed incumbent materials. This impact is underpinned by the exceptional properties of MHPs, including tuneable band gaps, high absorption coefficients, long carrier diffusion lengths and combined with uncomplicated synthesis methods. However, current MHP production relies on the toxic solvents, which pose significant environmental and health risks. Moreover, these methods often require complex multi component solvent systems and thermal processing to achieve the desired material phases, further hindering scalability and sustainability. Overcoming these challenges is critical to the future development of MHP-based technologies. Overcoming these challenges is critical to the future development of MHP-based technologies. Here, we present a novel water-based solvent system and synthetic approach for the preparation of size-controlled CsPbBr3 perovskite nanocrystals in ambient air and at room temperature. The photoluminescence quantum yield (PLQY) of CsPbBr3 erovskite nanocrystals (PNCs) exceeds 60 precent. To demonstrate the light to current conversion ability of our PNCs a series of photoconductors were prepared, with the best performing devices achieving a specific detectivity (D*) of 1.2 x 10^11 Jones. Thus, this green, scalable, and low-cost approach offers a sustainable pathway for precise size and compositional control of MHP nanocrystals, opening new possibilities for environmentally friendly optoelectronic applications.
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