The Types segment classifies cadmium‑containing quantum dots into four technical families: core‑only, core‑shell, alloyed, and doped structures. Core‑only dots, the simplest form, contribute the baseline volume but are limited by surface trap states. Core‑shell configurations, which encapsulate a cadmium selenide core within a zinc sulfide shell, dominate the premium segment due to enhanced photostability and quantum yield, thereby adding disproportionate value relative to volume. Alloyed quantum dots, where cadmium is partially substituted with zinc or selenium, offer tunable band‑gap properties and capture a moderate share of the market. Doped quantum dots, incorporating impurity atoms to modify emission characteristics, occupy a specialized niche focused on advanced display and sensing applications. Together, these type categories delineate the technological landscape that shapes investment, R&D allocation, and ultimately the market size.