What energy-saving and efficiency enhancing effects can diodes bring under the goal of carbon neutrality?

1, Material Innovation: Wide Bandgap Semiconductors Open the Era of Low Loss
Traditional silicon-based diodes have prominent energy consumption issues in high-voltage and high-frequency scenarios due to their high on resistance and low switching frequency. Wide bandgap semiconductor materials represented by silicon carbide (SiC) and gallium nitride (GaN) have become the core direction for upgrading diode technology due to their physical advantages.

Reduced conduction loss
The conduction resistance of SiC diodes is only 1/100 to 1/300 of that of silicon-based devices. In the application of 800V high-voltage charging piles, the conduction loss can be reduced by more than 60%. For example, ROHM's SiC Schottky diode improves efficiency by 3% compared to silicon-based devices at a working frequency of 100kHz, and the forward voltage drop decreases from 0.45V to 0.28V, resulting in a 0.4 percentage point increase in system efficiency.
Optimization of switch characteristics
The reverse recovery time of SiC diodes is close to zero, and the high-frequency switching characteristics significantly improve power conversion efficiency. In data center power systems, power electronic modules using SiC diodes can increase the conversion efficiency from grid edge to processor from 80% to over 90%, saving over 200 kWh of electricity per server per year.
High temperature resistance and integration
SiC devices can operate stably in environments above 200 ℃, reducing the complexity of heat dissipation design. Through modular packaging, the silicon carbide diode of Tongfangdi Yi reduces the chip area by 20%, while integrating driving circuits and protection functions to form a high-power density composite, suitable for scenarios such as electric vehicle charging modules and industrial motor drives.
2, Application scenario expansion: from single component to system level energy-saving
The energy-saving and efficiency enhancing value of diodes has extended from traditional rectification and voltage regulation functions to full chain energy management, covering core areas such as new energy generation, electric vehicles, industrial control, and data centers.

New energy generation: improving photovoltaic inverter efficiency
In photovoltaic systems, SiC diodes applied to DC-AC inverters can reduce switching losses by 30% and improve system efficiency by 2-3 percentage points. Taking a 100MW photovoltaic power station as an example, the annual power generation can increase by 2 million kWh and reduce carbon dioxide emissions by 1600 tons.
Electric Vehicles: Shortening Charging Time and Extending Range
In the 800V high-voltage fast charging platform, SiC diodes and MOSFETs work together to increase the power density of the charging module to 35kW/L, and the charging efficiency reaches 98%. After adopting SiC power devices, Tesla Model 3 has increased its range by 5% and reduced charging time by 20%.
Industrial motors: reducing energy consumption and maintenance costs
Industrial motor systems account for 45% of global electricity consumption, and variable frequency drives using SiC diodes can increase motor efficiency from 85% to 95%. For example, after the renovation of a certain steel enterprise, the annual electricity savings reached 120 million kWh and carbon emissions were reduced by 96000 tons.
Data Center: Optimizing Power Management and Cooling
The power consumption of data centers accounts for 2% of the global total, and the use of SiC diode power modules can reduce the PUE (Power Usage Efficiency) value to below 1.1. Taking ultra large scale data centers as an example, the annual energy savings exceed 50 million kWh, which is equivalent to reducing the consumption of 40000 tons of standard coal.
3, Industrial Chain Collaboration: Localization Substitution and Ecological Reconstruction
Against the backdrop of global supply chain restructuring, China's diode industry is moving from "following the trend" to "leading the way" through technological breakthroughs and ecological synergy.

Material end: Expansion of SiC substrate production capacity
Domestic enterprises such as Tianyue Advanced and Sanan Optoelectronics have achieved mass production of 6-inch SiC substrates, with a global production capacity of 30% by 2025. The substrate cost has decreased by 60% compared to 2020, driving the price of SiC diodes from $10 per chip to $2, accelerating their penetration in the consumer electronics and photovoltaic fields.
Manufacturing end: iterative packaging and testing technology
Domestic enterprises use miniaturization packaging technologies such as DFN and SODFL to reduce diode parasitic inductance by 50% and adapt to high-density PCB layouts. For example, Shilanwei's 1200V SiC diode is packaged on a copper substrate, which reduces temperature rise by 40 ℃ compared to traditional products and significantly improves system reliability.
Application end: Deep binding of ecological chain
BYD, Huawei Digital Energy and other system manufacturers collaborate with diode companies to develop customized products. For example, Yangjie Technology has collaborated with BYD to develop automotive grade SiC diodes, which have been widely applied in Han EV models with a single vehicle value of over 500 yuan, forming a closed-loop ecosystem of "materials chips systems".