Analysis of CO2 emission reduction contribution and efficiency of Chinaa??s solar photovoltaic industry: Based on Input-output perspective

摘要： As one of the most promising renewable energy sources, the amount of solar photovoltaics has reached 104.1 GW in 2018. China not only has the natural advantages of abundant solar energy resources, but the photovoltaic industry under the government’s support has also become the main driving force for global development. Facing the structural adjustment of solar photovoltaic parity online and the important contribution of solar power generation to energy conservation and emission reduction, this paper based on the radial and non-radial comprehensive consideration of EBM (Epsilon-Based Measure) DEA (Data envelopment analysis) model from the input-output perspective on solar photovoltaic industry CO2 emission reduction and ef?ciency analyze. It is concluded that the total ef?ciency of the solar photovoltaic industry in China’s six regions shows a growing trend, but the regional differences are obvious. The overall ef?ciency of the northwest region is superior. Among the index ef?ciency, CO2 emission reduction ef?ciency is better than cumulative installed capacity ef?ciency, solar energy utilization hour ef?ciency is the lowest, and CO2 emission reduction and cumulative installed capacity ef?ciency all show a consistent trend. It shows that the ef?ciency of cumulative installed capacity has a positive impact on CO2 emission reduction, but the ef?ciency of solar power generation needs to be improved.