The word **太阳能** (tàiyángnéng) is formed through a logical compounding of three morphemes: **太** (tài, meaning "great" or "extreme"), **阳** (yáng, meaning "sun" or "positive principle"), which combine to create **太阳** (tàiyáng, "sun"), and then **能** (néng, meaning "energy" or "capability"). Structurally, it follows a modifier-head pattern where "太阳" (sun) modifies "能" (energy), literally creating "sun-energy" to denote "solar energy." This formation exemplifies modern Chinese terminology for scientific concepts, where existing characters are combined in a semantically transparent and descriptive way to name new technologies.