Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Driven by the unique optoelectronic features arising from strong quantum confinement along thickness direction, rapid development of CdSe-based nanoplatelets (NPL) has accomplished facile bandgap tunability over a broad spectrum via different preparation protocols or various postsynthesis treatments. The anisotropic geometry NPLs also stimulates exploitation self-assembled CdSe NPL superstructures to enhance light extraction efficiency in display technologies and achieves polarized lasing performance even electrically pumped laser adjusting transition dipole orientation. Although several review articles about general optical properties have been published, none them focus on ability spectral precise control orientations solid-state phase NPLs. Herein, band structure engineering approaches family are systematically summarized device metrics these deliberately engineered compared. Then, recent advanced studies motivation assembly methods geometrically superlattices discussed. Finally, current challenges future outlook controlled modification influences aspect NPL–based devices’ highlighted.