Solar energy as the future energy is concerned, in the next generation of products of several BC cells(HPBC, TBC, HBC), HPBC is a direction of the development of solar cell technology. HPBC cell combine the benefits of passivated emitter and back surface passivated contact technology (PERC) and adopt a back contact design. This structure usually forms passivation contact on the back of the battery to reduce the front occlusion and improve light absorption

Structure diagram of three different BC solar cell

HPBC (Hybrid Passivated Back Contact) solar cell

HPBC solar cells, full name Hybrid Passivated Back Contact cells, are a new generation of high-efficiency solar cell technology.

HPBC solar cells combine the advantages of passivated emitter and back surface passivated contact (PERC) technology and adopt a back contact design, which usually forms passivated contact on the back of the cell to reduce the front occlusion and improve light absorption.

Passivation effect: The passivation layer of HPBC solar cells helps to reduce surface recombination and increase the open circuit voltage (Voc) of the solar cell. Technical features: HPBC solar cell technology combines TOPCon and IBC technology, all the metal gate lines responsible for collecting and transmitting carriers of the solar cell are moved to the back of the module, so that the front of the solar cell is free of gate lines, thereby improving the utilization rate of light and photoelectric conversion efficiency.

Technical advantages: HPBC solar cells have the characteristics of stronger light absorption, higher conversion efficiency, more stable power transmission, more beautiful products, mature technology and more reliable.

Application scenario: HPBC solar cells are naturally suitable for distributed photovoltaic scenarios, especially BIPV (Photovoltaic building integration), which can fully combine the beauty and architectural art of BC components.

The HBC cell, or heterojunction back contact crystalline silicon cell, is a high-efficiency solar cell that combines heterojunction (HJT) technology and cross-finger back contact (IBC) technology.

TBC (TOPCon Back Contact) solar cells

TBC solar cells, full name TOPCon and IBC technology combined to form a solar cell, also known as POLO-IBC solar cells.

Structural features: TBC solar cells adopt the tunnel oxide passivation contact (TOPCon) technology and apply it to the back contact structure. This design takes advantage of the high passivation quality and good contact characteristics of TOPCon technology. Efficiency potential: TBC solar cells have high efficiency potential due to their excellent passivation performance and back contact design.

Industrialization progress: At present, the TBC solar cell technology route is in the laboratory research stage, and there are still many problems to be solved in the industrialization process. In the short term, the development prospect of TBC solar cell route is broader, because TOPCon's process route is more mature than HJT's process route, the cost is lower, and the TBC production line is partially compatible with TOPCon's production line.

Application potential: TBC solar cells can not only be applied to N-type crystalline silicon substrate, but also can be applied to P-type substrate, which has great potential in terms of photoelectric conversion efficiency improvement and cost reduction.

HBC (Heterojunction Back Contact) solar cells

Structural characteristics: The HBC battery uses heterojunction technology and combines it with the back contact structure. This structure usually forms a heterojunction on the back of the solar cell to enable efficient carrier collection.

High efficiency potential: HBC solar cells are considered to be strong candidates for high efficiency solar cells due to their excellent heterojunction characteristics and back contact design.

HPBC, TBC and HBC solar cells all represent advances in photovoltaic cell technology, which improve the photoelectric conversion efficiency of solar cells through different technical paths.

TBC and HBC solar cells are superior to classical IBC technologies in terms of conversion efficiency.

HBC solar cells combine the surface passivation performance of HJT solar cells and the advantages of IBC solar cells without metal shielding on the front, with the dual advantages of large short circuit current and high open circuit voltage, representing the highest photoelectric conversion efficiency level of crystalline silicon solar cells.