Holistic Determination of Optoelectronic Properties using High-Throughput Spectroscopy of Surface-Guided CsPbBr3 Nanowires.
Holistic Determination of Optoelectronic Properties using High-Throughput Spectroscopy of Surface-Guided CsPbBr3 Nanowires.
复制标题
DOI：
10.1021/acsnano.2c01086
复制
发表时间：
2022-06-28
期刊：
影响因子：
17.1
通讯作者：
Parkinson, Patrick W.
中科院分区：
文献类型：
--
作者：
Church, Stephen A.;Choi, Hoyeon;Al-Amairi, Nawal;Al-Abri, Ruqaiya;Sanders, Ella;Oksenberg, Eitan;Joselevich, Ernesto;Parkinson, Patrick W.
光电子微纳米结构具有广阔的参数空间，可以探索对其功能性能进行修饰和优化。本文报告了一种以数据为导向的方法，使用高通量单纳米结构光谱来探测>；8000结构，允许以统计置信度对多种材料和光电子参数进行整体分析。该方法被应用于表面导引的CsPbBr3纳米线，这些纳米线具有复杂且相互关联的几何、结构和电子性质。基于光致发光的测量同时研究了表面和嵌入界面，利用纳米线之间的自然几何变化来表明，增加纳米线宽度减小了光学带隙，增加了纳米线体内的复合速率，并降低了表面界面的复合速率。载流子复合和扩散模型将这些趋势归因于界面上的载流子密度和应变效应，并自一致地恢复了载流子迁移率、陷阱密度、带隙、扩散长度和内部量子效率的值。该模型预测了内量子效率随宽度的变化等参数趋势，并得到了实验验证。由于这种方法需要最少的先验信息，因此它广泛适用于纳米和微米级的材料。
Optoelectronic micro- and nanostructures have a vast parameter space to explore for modification and optimization of their functional performance. This paper reports on a data-led approach using high-throughput single nanostructure spectroscopy to probe >8000 structures, allowing for holistic analysis of multiple material and optoelectronic parameters with statistical confidence. The methodology is applied to surface-guided CsPbBr3 nanowires, which have complex and interrelated geometric, structural, and electronic properties. Photoluminescence-based measurements, studying both the surface and embedded interfaces, exploits the natural inter nanowire geometric variation to show that increasing the nanowire width reduces the optical bandgap, increases the recombination rate in the nanowire bulk, and reduces the rate at the surface interface. A model of carrier recombination and diffusion ascribes these trends to carrier density and strain effects at the interfaces and self-consistently retrieves values for carrier mobility, trap densities, bandgap, diffusion length, and internal quantum efficiency. The model predicts parameter trends, such as the variation of internal quantum efficiency with width, which is confirmed by experimental verification. As this approach requires minimal a priori information, it is widely applicable to nano- and microscale materials.
登录
查看更多内容
影响因子：
16.6
作者：
Jiang Y;Huang J;Xu C;Pu K
通讯作者：
Pu K
影响因子：
5.7
作者：
Mannino, Giovanni;Deretzis, Ioannis;Cahen, David
通讯作者：
Cahen, David
用于高性能电子和光电子学的全无机钙钛矿纳米线的直接气-液-固合成
影响因子：
17.1
作者：
Meng, You;Lan, Changyong;Ho, Johnny C.
通讯作者：
Ho, Johnny C.
影响因子：
56.9
作者：
Ni, Zhenyi;Bao, Chunxiong;Huang, Jinsong
通讯作者：
Huang, Jinsong
影响因子：
10.8
作者：
Oksenberg, Eitan;Sanders, Ella;Joselevich, Ernesto
通讯作者：
Joselevich, Ernesto