Answer:
At the end of photosynthesis, energy is stored in the form of chemical energy, primarily in the molecules of glucose (a type of sugar) and other organic compounds. This chemical energy is captured in the bonds of these molecules and can be used by the plant or other organisms when these compounds are broken down during cellular respiration to produce adenosine triphosphate (ATP), which is the primary energy currency in cells.
Shorter answer if your lazy:
At the end of photosynthesis, energy is stored in the form of glucose and other organic molecules.