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Van der Waals Template-Assisted Low-Temperature Epitaxial Growth of 2D Atomic Crystals
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-06-22 , DOI: 10.1002/adfm.202202580 Lijuan Niu 1 , Yuyin Li 2 , Mei Zhao 1 , Zhenjing Liu 2 , Mengjia Zhang 3 , Changchun Ding 3 , Zhenjun Dou 1 , Yihong She 3 , Kenan Zhang 2 , Zhengtang Luo 2 , Lijie Zhang 1 , Shun Wang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-06-22 , DOI: 10.1002/adfm.202202580 Lijuan Niu 1 , Yuyin Li 2 , Mei Zhao 1 , Zhenjing Liu 2 , Mengjia Zhang 3 , Changchun Ding 3 , Zhenjun Dou 1 , Yihong She 3 , Kenan Zhang 2 , Zhengtang Luo 2 , Lijie Zhang 1 , Shun Wang 1
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To date, the synthesis of high-quality 2D crystals using vapor deposition methods usually requires high temperature, hindering the integration of 2D materials with Si circuits and exacerbating energy consumption. Exploring low-temperature growth strategies and understanding synthesis mechanism are critical for the practical application of 2D materials. Herein, a van der Waals (vdW) template-assisted growth of 2D crystals (including PbI2, CdI2, BiI3, CuI, Sb2Te3, and Bi2Se3) is reported, the growth temperature decreases by maximum 35% compared with traditional vapor deposition. The low-temperature 2D growth process resulting from the low surface diffusion barrier of precursors on vdW surfaces is proposed, confirmed by the density functional theory and molecular dynamics calculations. Particularly, the grown 2D crystals can be peeled off from vdW templates easily and transferred to arbitrary substrates for functional applications and the exfoliated vdW templates can be reused for another round of growth. Although the growth temperature is reduced greatly, the excellent photoelectric performance of grown 2D crystals is demonstrated, benefitting from high crystalline quality. These findings provide a universal method for the low-temperature synthesis of high-crystallinity 2D materials toward applications in flexible electronics.
中文翻译：
范德华模板辅助低温外延生长二维原子晶体
迄今为止，使用气相沉积法合成高质量的二维晶体通常需要高温，阻碍了二维材料与硅电路的集成，并加剧了能源消耗。探索低温生长策略和了解合成机理对于二维材料的实际应用至关重要。在此，范德华 (vdW) 模板辅助生长二维晶体（包括 PbI 2、CdI 2、BiI 3、CuI、Sb 2 Te 3和 Bi 2 Se 3) 据报道，与传统气相沉积相比，生长温度最多降低了 35%。提出了由前驱体在 vdW 表面上的低表面扩散势垒导致的低温二维生长过程，并通过密度泛函理论和分子动力学计算得到证实。特别是，生长的 2D 晶体可以很容易地从 vdW 模板上剥离下来并转移到任意基板上用于功能应用，并且剥离的 vdW 模板可以重复用于另一轮生长。尽管生长温度大大降低，但生长的二维晶体表现出优异的光电性能，这得益于高晶体质量。
更新日期：2022-06-22
中文翻译：
范德华模板辅助低温外延生长二维原子晶体
迄今为止，使用气相沉积法合成高质量的二维晶体通常需要高温，阻碍了二维材料与硅电路的集成，并加剧了能源消耗。探索低温生长策略和了解合成机理对于二维材料的实际应用至关重要。在此，范德华 (vdW) 模板辅助生长二维晶体（包括 PbI 2、CdI 2、BiI 3、CuI、Sb 2 Te 3和 Bi 2 Se 3) 据报道，与传统气相沉积相比，生长温度最多降低了 35%。提出了由前驱体在 vdW 表面上的低表面扩散势垒导致的低温二维生长过程，并通过密度泛函理论和分子动力学计算得到证实。特别是，生长的 2D 晶体可以很容易地从 vdW 模板上剥离下来并转移到任意基板上用于功能应用，并且剥离的 vdW 模板可以重复用于另一轮生长。尽管生长温度大大降低，但生长的二维晶体表现出优异的光电性能，这得益于高晶体质量。
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