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Improved Crystallization Quality of FAPbBr3 Single Crystals by a Seeded Solution Method
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-11-02 , DOI: 10.1021/acsami.2c15343 Xin Liu 1 , Quanchao Zhang 1 , Dou Zhao 1 , Ruichen Bai 1 , Yinjie Ruan 2 , Binbin Zhang 1 , Fangpei Li 1 , Menghua Zhu 1 , Wanqi Jie 1 , Yadong Xu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-11-02 , DOI: 10.1021/acsami.2c15343 Xin Liu 1 , Quanchao Zhang 1 , Dou Zhao 1 , Ruichen Bai 1 , Yinjie Ruan 2 , Binbin Zhang 1 , Fangpei Li 1 , Menghua Zhu 1 , Wanqi Jie 1 , Yadong Xu 1
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Solution-grown hybrid perovskite, FAPbBr3, has attracted great attentions recently due to its inspiring optoelectronic properties and low-cost preparation method. However, challenges of solution growth for FAPbBr3 bulk crystals remain yet, such as uncontrollable crystalline morphologies, irregular shapes, and limited crystal sizes, which are attributed to the dense crystallization nucleus. In this work, we investigate the effects of growth conditions and seed behaviors on the crystallization quality and the yield of FAPbBr3 single crystals. First, the spontaneous nucleation is tailored by optimizing the precursor concentration and heating rate. Furthermore, the seeded crystals are introduced to solve the issues related to the morphology and the yield of single crystals. Based on the above-mentioned investigations, an optimized growth method, a seeded solution method, under a heating rate of 0.1 °C/h is proposed, and centimeter-scale FAPbBr3 single crystals with a very narrow FWHM of high-resolution X-ray diffraction rocking curves and a high yield of ∼100% of single crystals are obtained. The resulting FAPbBr3 single crystal exhibits a bulk resistivity of 3.42 × 109 Ω·cm and a superior ION/IOFF ratio over 104 under 405 nm light at a bias of 10 V. Finally, the pulse height spectra with an energy resolution of ∼21.4% are also achieved based on an AZO/FAPbBr3/Au detector, illuminated using an uncollimated 241Am@5.49 MeV α-particle source at room temperature. This modified seeded solution method shows great potential in preparing high-quality and high-yield perovskite single crystals.
中文翻译：
种子溶液法提高 FAPbBr3 单晶的结晶质量
溶液生长的杂化钙钛矿 FAPbBr 3由于其令人振奋的光电特性和低成本的制备方法，最近引起了极大的关注。然而，FAPbBr 3块状晶体溶液生长的挑战仍然存在，例如不可控的晶体形态、不规则的形状和有限的晶体尺寸，这归因于致密的晶核。在这项工作中，我们研究了生长条件和晶种行为对 FAPbBr 3结晶质量和产率的影响单晶。首先，通过优化前体浓度和加热速率来调整自发成核。此外，引入晶种以解决与单晶形貌和产率相关的问题。基于上述研究，提出了一种优化的生长方法——种子溶液法，在0.1 °C/h的升温速率下，获得了具有极窄FWHM的高分辨率X-的厘米级FAPbBr 3单晶。获得了射线衍射摇摆曲线和~100%的高单晶产率。所得 FAPbBr 3单晶具有 3.42 × 10 9 Ω·cm 的体积电阻率和出色的I ON / I OFF在 10 V 的偏压下，在 405 nm 光下的比率超过 10 4。最后，基于 AZO/FAPbBr 3 /Au 检测器，使用非准直241 Am@照明，也获得了能量分辨率为 ~21.4% 的脉冲高度光谱室温下 5.49 MeV α 粒子源。这种改良的晶种溶液法在制备高质量、高产率的钙钛矿单晶方面显示出巨大的潜力。
更新日期：2022-11-02
中文翻译：
种子溶液法提高 FAPbBr3 单晶的结晶质量
溶液生长的杂化钙钛矿 FAPbBr 3由于其令人振奋的光电特性和低成本的制备方法，最近引起了极大的关注。然而，FAPbBr 3块状晶体溶液生长的挑战仍然存在，例如不可控的晶体形态、不规则的形状和有限的晶体尺寸，这归因于致密的晶核。在这项工作中，我们研究了生长条件和晶种行为对 FAPbBr 3结晶质量和产率的影响单晶。首先，通过优化前体浓度和加热速率来调整自发成核。此外，引入晶种以解决与单晶形貌和产率相关的问题。基于上述研究，提出了一种优化的生长方法——种子溶液法，在0.1 °C/h的升温速率下，获得了具有极窄FWHM的高分辨率X-的厘米级FAPbBr 3单晶。获得了射线衍射摇摆曲线和~100%的高单晶产率。所得 FAPbBr 3单晶具有 3.42 × 10 9 Ω·cm 的体积电阻率和出色的I ON / I OFF在 10 V 的偏压下，在 405 nm 光下的比率超过 10 4。最后，基于 AZO/FAPbBr 3 /Au 检测器，使用非准直241 Am@照明，也获得了能量分辨率为 ~21.4% 的脉冲高度光谱室温下 5.49 MeV α 粒子源。这种改良的晶种溶液法在制备高质量、高产率的钙钛矿单晶方面显示出巨大的潜力。
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