RD INTEGRATED LIFE CYCLE ASSESSMENT: A CASE STUDY ON THE RD OF SILICON HETEROJUNCTION (SHJ) SOLAR CELL BASED PV SYSTEMS

摘要

Recently R&D of silicon heterojunction (SHJ) solar cells has seen a strong increase. SHJ cells offer thepossibility of high efficiencies coupled with several advantages in the production process compared to conventionalcrystalline silicon solar cells. We performed a Life Cycle Assessment on two types of SHJ solar cell based PVsystems, to establish the potential life cycle greenhouse gas emissions, energy pay-back time (EPBT) and cumulativeenergy demand (CED) of these cells. Results show that the life cycle greenhouse gas emissions could be 36 gCO_2-eq/kWh for both SHJ cell based systems, compared to 41 gCO_2-eq/kWh for a conventional monocrystalline siliconPV system. The EPBT of these devices are 1.7 and 2.0 years with a CED of 24-25 compared to 29 MJ/W_p,respectively.