MBB, SMBB, and 0BB Solar Cells: Technological Advances and Application Prospects

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2.What is Multi-Busbar (MBB) Technology?

3.Characteristics and Main Advantages of MBB (Multi-Busbar) Technology

4.SMBB: Following the Mass Production of TOPCon Cells

5.What is Zero Busbar (0BB) Technology?

6.Advantages of 0BB Technology

7.Key Benefits in the 0BB Production Process



Busbars are like the skeleton of a photovoltaic (PV) cell, supporting the entire cell to generate electricity. Within a crystalline silicon cell, the current generated is primarily extracted through metal electrodes, which can be divided into main busbars and auxiliary busbars (also known as fine busbars). The main busbars are primarily used for current collection and series connection of the auxiliary busbars, while the auxiliary busbars are used to collect photogenerated carriers.

Reviewing the entire development process, it is evident that the technology for PV busbars has evolved rapidly, with iteration cycles generally maintaining a pace of 2-3 years. The major stages include the transition from 4BB and 5BB to MBB (Multi-Busbar, with 9-15 busbars), followed by SMBB (Super Multi-Busbar, with 16 or more busbars), and finally to 0BB (Zero Busbar, with no main busbars).

What is Multi-Busbar (MBB) Technology?

In the photovoltaic (PV) field, Multi-Busbar (MBB) technology is an important method for improving the efficiency of solar cells. By increasing the number of busbars on the cell surface, MBB technology significantly enhances the performance and reliability of the cells. Traditional PV cells typically use 2 to 5 busbars, while MBB technology employs 9 or more busbars.

What is Multi-Busbar (MBB) Technology?