双面p型PERC太阳电池的紫外衰减特性研究及电池紫外稳定性优化

RESEARCH ON DECAY CHARACTERISTICS OF BIFACIALp-TYPE PERC SOLAR CELL AND OPTIMIZATION OF ULTRAVIOLET IRRADIATING STABILITY

以不同掺杂元素的高效双面p型PERC电池电性能参数在紫外辐照后的衰减特性为研究对象。硼元素掺杂和镓元素掺杂的双面PERC电池背面受紫外光辐照后,背面、正面效率均发生衰减,但两者背面效率衰减主要来自于I_(sc)衰减,而正面效率衰减主要来自于FF衰减,U_(oc)在整个紫外辐照过程中表现稳定,背面衰减与紫外辐照后钝化层的折射率增大有关,而正面衰减可能与电池串阻增大有关。通过增加电池背面钝化层厚度优化紫外稳定的镓掺杂双面电池的紫外稳定性。优化后的电池在15 kWh/m^(2)紫外辐照后,电池背面效率衰减仅为0.04%,同时其正面效率衰减相比于未加厚的电池下降0.32%,说明这种镓掺杂双面电池在户外光照下高稳定的潜力。

Decay characteristics of high efficiency bifacial p-type PERC solar cell with different doping elements are investigated.Under ultraviolet ray irradiation,efficiency of Gallium-doped and Boron-doped double-side PERC solar cell decays. Decay of backside efficiency due to the decay of I_(sc) while the decay of front side due to the decay of FF. U_(oc) is consistent under ultraviolet ray irradiation.Decay of backside is related with the increase of refractive index of refractive index and the front side decay is related with the increase of serial resistance. By increasing the thickness of refractive index,resistance UV irradiating stability is improved. Backside decay of optimized cell is 0.04% under ultraviolet ray irradiation with 15 kWh/m^(2) and front side decay reduced by 0.32% in comparison with original solar cell. This illustrates the Gallium-doped double-side Perc solar cell has potential stability under outdoor illumination.