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Optical Property Behaviors of CsPbBr3 Colloidal Nanoparticles in a Ligand-Assisted Reprecipitation Process
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-07-20 , DOI: 10.1021/acs.cgd.0c00143 Mingming Chen 1 , Youwen Yuan 1 , Zhaokun Wang 1, 2 , Xuemin Shen 1 , Yuan Liu 1 , Dawei Cao 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-07-20 , DOI: 10.1021/acs.cgd.0c00143 Mingming Chen 1 , Youwen Yuan 1 , Zhaokun Wang 1, 2 , Xuemin Shen 1 , Yuan Liu 1 , Dawei Cao 1
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Recently, all-inorganic cesium lead halide perovskite CsPbX3 (X = Cl, Br, and I) colloidal nanoparticles (NPs) have attracted tremendous attention owing to their potential applications in light-emitting devices. A better understanding of optical property behaviors of the colloidal NPs during the growth process is of vital importance toward the controllable synthesis of CsPbX3 with desired luminescence properties. In this work, the optical property behaviors of as-grown CsPbBr3 NPs in the ligand-assisted reprecipitation process have been investigated via in situ photoluminescence (PL) spectroscopy. It showed that the growth parameters including growth temperature and time play important roles in determining the optical properties of the CsPbBr3 NPs. Specifically, the as-grown CsPbBr3 NPs emitted high-energy photons with a broad full width at half-maximum (fwhm) within the early stage of growth, while prolonging the growth duration led to a narrowing of PL spectra and a redshift of photon emission. Meanwhile, such PL emission evolution behaviors can be further modulated by tuning the growth temperature. On this basis, the optimized growth parameters including growth temperature and time for the fabrication of CsPbBr3 NPs with various luminescence properties were finally proposed.
中文翻译：
CsPbBr 3胶体纳米粒子在配体辅助沉淀过程中的光学性质行为。
近来，全无机卤化铯铯钙钛矿CsPbX 3（X = Cl，Br和I）胶体纳米颗粒（NPs）由于其在发光器件中的潜在应用而备受关注。更好地理解在生长过程中胶体NP的光学特性行为对于可控合成具有所需发光特性的CsPbX 3至关重要。在这项工作中，已通过原位光致发光（PL）光谱研究了CsPbBr 3 NPs在配体辅助的再沉淀过程中的光学性能行为。结果表明，生长温度和时间等生长参数在确定CsPbBr 3的光学性质中起着重要作用。NP。具体而言，生长的CsPbBr 3 NP在生长早期以半最大（fwhm）的半高全宽发射出高能光子，而延长生长时间导致PL光谱变窄和光子红移。排放。同时，可以通过调节生长温度来进一步调节这样的PL发射演化行为。在此基础上，最后提出了具有不同发光特性的CsPbBr 3 NPs的最佳生长参数，包括生长温度和时间。
更新日期：2020-08-05
中文翻译：
CsPbBr 3胶体纳米粒子在配体辅助沉淀过程中的光学性质行为。
近来，全无机卤化铯铯钙钛矿CsPbX 3（X = Cl，Br和I）胶体纳米颗粒（NPs）由于其在发光器件中的潜在应用而备受关注。更好地理解在生长过程中胶体NP的光学特性行为对于可控合成具有所需发光特性的CsPbX 3至关重要。在这项工作中，已通过原位光致发光（PL）光谱研究了CsPbBr 3 NPs在配体辅助的再沉淀过程中的光学性能行为。结果表明，生长温度和时间等生长参数在确定CsPbBr 3的光学性质中起着重要作用。NP。具体而言，生长的CsPbBr 3 NP在生长早期以半最大（fwhm）的半高全宽发射出高能光子，而延长生长时间导致PL光谱变窄和光子红移。排放。同时，可以通过调节生长温度来进一步调节这样的PL发射演化行为。在此基础上，最后提出了具有不同发光特性的CsPbBr 3 NPs的最佳生长参数，包括生长温度和时间。
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