Solar energy utilization unit and combined formation thereof

A solar energy utilization unit, comprising:

• a light energy utilization member having a first light energy utilization portion and a second light energy utilization portion that are arranged opposite to each other and are capable of receiving, converting and utilizing sunlight;
• a liquid light concentration member having an accommodating chamber that is filled with transparent liquid and have transparent walls comprising a top wall and a side wall, through which the sunlight is allowed to be transmitted into the transparent liquid, the light energy utilization member being arranged inside or outside the accommodating chamber, or formed as a bottom wall of the accommodating chamber, the first light energy utilization portion being arranged and faced towards the liquid light concentration member or the transparent liquid, and the liquid light concentration member forming a structure capable of transmitting and/or fully reflecting the sunlight to the first light energy utilization portion;
• and
• a reflection structure, wherein a light inlet is left between the reflection structure and the liquid light concentration member for the sunlight to enter, a light reflection chamber is formed among the reflection structure, the second light energy utilization portion and the liquid light concentration member, the light inlet is communicated with the light reflection chamber, and the reflection structure is capable of reflecting the sunlight entered into the light reflection chamber onto the second light energy utilization portion.