当前位置：
X-MOL 学术
›
Acc. Mater. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Colloidal Nanocrystals: A Promising Semiconductor Platform for Photon/Exciton Manipulation
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2024-07-16 , DOI: 10.1021/accountsmr.3c00286 Xing Lin 1 , Zikang Ye 2 , Zhiyuan Cao 3 , Haiyan Qin 4 , Xiaogang Peng 4
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2024-07-16 , DOI: 10.1021/accountsmr.3c00286 Xing Lin 1 , Zikang Ye 2 , Zhiyuan Cao 3 , Haiyan Qin 4 , Xiaogang Peng 4
Affiliation
|
The invention of single-crystalline semiconductors and related devices allows us to manipulate electrons (or holes) as free charge carriers with ease. Photons and electrons are two types of fundamental particles for electromagnetic interaction, and optical/optoelectronic devices are thus likely as important as semiconductor electronic devices. Photons themselves have negligible direct interactions with each other, and manipulating photons─controlling their color purity and color accuracy, phase coherency and polarity, conversion from/to other forms of energy, etc.─is primarily achieved through their interactions with matter. Different from dealing with a single type of quasiparticle (electrons or holes) in a specific spatial region for electron manipulation, either absorbing or emitting a photon by matter, always involves a colocalized electron–hole pair as the transient state. In this sense, the key for manipulating photons is manipulating electron–hole pairs that are often called excitons. Similar to the corresponding bulk semiconductor, the binding energy is insufficient to stably bond a Wannier–Mott exciton in a typical semiconductor nanocrystal. However, two dynamic quasiparticles (electron and hole) are spatially confined within a nanocrystal by the energy barriers provided by the surrounding ligands/solvents, leading to formation of a special type of exciton, i.e., dynamic exciton.
中文翻译：
胶体纳米晶体：一个有前途的光子/激子操纵半导体平台
单晶半导体和相关器件的发明使我们能够轻松地将电子（或空穴）操纵为自由电荷载流子。光子和电子是电磁相互作用的两种基本粒子，因此光学/光电子器件可能与半导体电子器件一样重要。光子本身相互之间的直接相互作用可以忽略不计，而操纵光子——控制它们的颜色纯度和颜色准确性、相位相干性和极性、从/到其他形式的能量的转换等——主要是通过它们与物质的相互作用来实现的。与在特定空间区域处理单一类型的准粒子（电子或空穴）进行电子操纵不同，无论是物质吸收还是发射光子，总是涉及共定域电子空穴对作为瞬态。从这个意义上说，操纵光子的关键是操纵通常称为激子的电子-空穴对。与相应的块体半导体类似，结合能不足以在典型的半导体纳米晶体中稳定地结合万尼尔-莫特激子。然而，两个动态准粒子（电子和空穴）被周围配体/溶剂提供的能量势垒在空间上限制在纳米晶体内，导致形成特殊类型的激子，即动态激子。
更新日期：2024-07-16
中文翻译：
胶体纳米晶体：一个有前途的光子/激子操纵半导体平台
单晶半导体和相关器件的发明使我们能够轻松地将电子（或空穴）操纵为自由电荷载流子。光子和电子是电磁相互作用的两种基本粒子，因此光学/光电子器件可能与半导体电子器件一样重要。光子本身相互之间的直接相互作用可以忽略不计，而操纵光子——控制它们的颜色纯度和颜色准确性、相位相干性和极性、从/到其他形式的能量的转换等——主要是通过它们与物质的相互作用来实现的。与在特定空间区域处理单一类型的准粒子（电子或空穴）进行电子操纵不同，无论是物质吸收还是发射光子，总是涉及共定域电子空穴对作为瞬态。从这个意义上说，操纵光子的关键是操纵通常称为激子的电子-空穴对。与相应的块体半导体类似，结合能不足以在典型的半导体纳米晶体中稳定地结合万尼尔-莫特激子。然而，两个动态准粒子（电子和空穴）被周围配体/溶剂提供的能量势垒在空间上限制在纳米晶体内，导致形成特殊类型的激子，即动态激子。
京公网安备 11010802027423号