The Research On Life Cycle Assessment Of PbSe Quantum Dot Solar Cell

Some emerging technologies are expected to be pivotal for solving many of the environmental challenges faced today, especially those related to energy. However, many of these technologies may incur significant environmental impacts over their life cycle, while having environmental benefits during their use. In the process of this study on the life cycle assessment of Pb Se quantum dot solar cell, we use the LCA software Ga Bi to build the life cycle model of Pb Se quantum dot solar cell including the synthesis of Pb Se QDs from raw material acquisition,the manufacture of cell, the production of cell model and the use of the cell, and get the data from Ecoinvent Database to assess energy impacts and environment impacts in quantity by the CML method. Besides, we compare the different energy sources,including solar energy, water, wind, nuclear and son on, and different types of PV models, including mono-Si, multi-Si, Cd Te, Cd Se, Pb Se, for which data are available to provide a comprehensive assessment on their energy impacts and environment impacts.The results show that the PED of Pb Se quantum dot solar cell, of which energy efficiency is 6.2% and lifetime is 25 years, EPBT is 1.68-4.57 years. GWP is 8g CO2-eq./k Wh, AP is 47.41 mg SO2-eq./k Wh, HMEP is 549.71?g/k Wh, EP is 50.14 mg PO43--eq./k Wh. Our comparative results indicate that the solar energy PV has the lowest EPBT, the lower HMEP than wind and nuclear, and a slight higher than other energy PV on other environment impacts. While Pb Se quantum dot solar cell models have the better energy impacts and environment impacts, except HMEP, than any other PV models(except Cd Se).