When you cook spaghetti at home, you may not realize that this simple process can be a vivid metaphor for understanding the principles of calcite tandem solar cells. Let's dig a little deeper.

You've prepared a pot of water and noodles. Before the water boils, it just sits and waits, like a solar cell quietly absorbing energy in the sun. When you put the water on the fire and the heating begins, the water starts to get hot and a few small bubbles pop up, this is like the first layer of the solar cell, which starts to convert the sun's energy into heat energy, ready to boil the water, just like you are waiting for the water to boil to cook the pasta. Once the water boils, you put the noodles in. It takes a while for the noodles to cook, just like the first layer of solar cells uses sunlight to produce energy. However, when the water starts to get hot, you may notice that some of the noodles aren't fully cooked, and that's when you might think about adding some cold water. This cold water will help control the water temperature, prevent scalding, and continue to cook the noodles. It's like a second layer of Calcium Titanite solar cells, they utilize the light energy that was not fully utilized by the first layer of cells and continue to convert sunlight into electricity, just like cold water regulates the temperature, making the whole process more efficient.

This tandem design is similar to how you can make the most of heat when cooking pasta, ensuring both safety and efficiency. Water temperature control is critical during the pasta cooking process. When the water starts to get hot, you may notice that some of the noodles aren't fully cooked, at which point you'll add some cold water to regulate the temperature to prevent burns and continue cooking the noodles. The addition of this cold water helps you make the most of the heat and makes the whole pasta cooking process more efficient.

Imagine that the sun is a big kitchen and the sun is the constant source of heat. The first layer of solar cells is like the first pot in the kitchen, responsible for “cooking” the sun's energy. It is like a diligent cook, busy absorbing the heat (light energy) in the sunlight, and skillfully converting this heat into electricity, the “delicious food”. However, just as there are always a few missing fish when cooking noodles, the first layer of the battery, although it tries its best, there is always a little bit of light energy that is not fully “digested” by it.

At this point, the second layer of chalcogenide solar cells is like a “heater” in the kitchen. It is keenly aware that there is remaining thermal energy (light energy) that is not fully utilized, so it does not hesitate to take over the baton and continue to “deep processing” of this missing energy. Just as you find that the pasta is not hot enough after cooking, you will add some cold water to make the pot boil again to fully release the remaining heat energy, the second layer of the battery through its unique “magic”, the first layer of the missed light energy into electricity again, so that the whole solar cell “cooking” process is more thorough. The whole solar cell “cooking” process is more thorough. This multi-layer energy conversion design is like putting on a set of “high-efficiency absorption clothes” for the solar cell system. The second layer immediately after, that is, the calcium titanium ore solar cells, is like the second layer of fabric of this layer of “high-efficiency absorption clothing”, which is specifically responsible for capturing the weak light that the first layer missed, like the last trace of flower fragrance in the breeze, it is also gently collected. In this way, every ray of sunlight is fully utilized and hardly wasted, and the whole system is like an insatiable “energy collector”.

（Writer：Tick）