Photovoltaic building integrated thin-film solar cells utilize new methods

Under the macroeconomic regulatory basis of “turning the way and adjusting the structure”, no real progress has been made in the adjustment of energy production and consumption structure in 2011, and the proportion of clean energy is still low. How to make efficient use of clean energy has become the focus of the entire society. With energy-saving emission reductions entering the critical stage, energy-saving buildings are gradually being put on the agenda. National and local governments have successively introduced policies to encourage the use of clean energy in the construction sector.

As the cleanest renewable energy source on the planet, solar energy utilization technology has entered a period of rapid development. If solar energy is applied to residential buildings, the energy consumption of residential buildings can be reduced by 8%-10%. Architectural aesthetics says that "a house with sunshine is beautiful, and houses that are not energy-saving or environmentally friendly are even less beautiful." The combination of solar energy and architecture is not only an architectural art, but also an important part of energy conservation. Building energy efficiency urgently needs to be combined with solar energy.

China's solar energy has developed rapidly and is rich in resources. It has a very broad prospect of popularization and utilization. On the one hand, it is a low-cost, resource-rich solar energy resource. On the one hand, building energy consumption needs to be solved. The combination of solar energy and building integration will certainly bring about a new way of energy utilization. At present, the state has introduced encouraging policies to support the development of BIPV (Building Integrated Photovoltaic) technology. This move has opened up prospects for thin-film solar companies.

It is understood that BIPV is a form of photovoltaic technology that combines photovoltaic power generation systems with buildings. It has the characteristics of not occupying additional land resources, generating electricity in situ, and using electricity in situ, which can reduce transmission investment and transmission losses. In addition, the photovoltaic power generation peak coincides with the building power consumption peak, which can greatly ease the power shortage and ensure the building's power supply. It is of great significance to reduce the dependence on traditional energy sources and promote building energy conservation and emission reduction.

As a new generation of solar cells, thin-film solar cells have a unique advantage in BIPV. Thin-film solar cells not only have outstanding advantages such as abundant raw materials, low energy consumption, no pollution, and ease of large-area production, but also have many special advantages in photovoltaic building applications. advantage.

In terms of solar roofs, one of the main applications for photovoltaic buildings, thin-film batteries can exert their technical advantages. First, the thin-film battery has a weaker light response and a relatively low unit cost. Secondly, thin-film PV modules are more easily integrated with building components. While saving the cost of materials such as building components, they can also generate economic benefits through power generation and enhance the aesthetics of buildings.

Dr. Xu Zheng, director of the Institute of Solar Energy at the School of Science at Beijing Jiaotong University, said that thin-film solar cells will be very useful in the construction industry in the future. With the perfection of photovoltaic solar energy system and innovation of building technology, the combination of photovoltaic solar energy and architecture will be more perfect.