Abstract
This chapter presents a comprehensive overview of recent advancements in colloidal quantum dot (QD) displays. QDs, semiconductor nanocrystals with diameters <20nm, exhibit size-, shape-, and composition-dependent properties, allowing for tunable emission colors across a broad spectrum. In QD photoluminescence (QD-PL) techniques, QDs are excited by blue LEDs, generating green/red light with distinct RGB peaks. Commercialization efforts have led to the release of QD TVs utilizing CdSe-based QDs, enhancing color gamut and efficiency. Recent focus has shifted towards Cd-free QDs, showing improvements in external quantum efficiency (EQE) and operational stability, paving the way for commercialization. QD electroluminescence (QD-EL) devices QD electroluminescence (QD-EL) devices utilize electric current to introduce electrons and holes into QDs. The subsequent recombination of these charge carriers within the QDs results in the emission of energy in the form of photons. In particular, QD light emitting diodes (QLED) present EQE approaching theoretical limits across the RGB spectrum. Key studies on QD stability, carrier dynamics, synthesis, and device technologies are reviewed, highlighting the challenges and opportunities in QD-based displays.
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