Photoluminescence, electroluminescence and electrochemiluminescence of quantum dots
Xiaogang Peng a
a Department of Chemistry, Zhejiang University, China, Hangzhou, China
Proceedings of Internet Conference for Quantum Dots (iCQD)
Online, Spain, 2020 July 14th - 17th
Organizers: Quinten Akkerman, Raffaella Buonsanti, Zeger Hens and Maksym Kovalenko
Invited Speaker, Xiaogang Peng, presentation 062
Publication date: 3rd July 2020

Quantum dots are expected to play a unique as emissive materials with various excitation means, including photo-excitation for photoluminescence, electro-excitation for electroluminescence, and electrochemical-excitation for electrochemiluminescence. Each of these types of applications has its unique requirements for quantum dots. This talk intends to briefly discuss these requirements and tailored design for each type of applications. One thing is in common for any realistic applications as emitters, that the QDs must be core/shell ones. While photoluminescence relies on absorbing a single photon and generating an electron-hole pair within a core/shell QD, electroluminescence and electrochemiluminescence both rely on injection of electron and hole separately from the environment. As a result, electroluminescence and electrochemiluminescence are both sensitive to the interface structure between the inorganic nanocrystal and organic ligands/solvents. Given QDs must be diffuse freely in solution after receiving one of the carriers and before receiving the other, electroluminescence is further more sensitive to the interface structure.

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