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Sanyo''s Challenges to the Development of High-efficiency HIT Solar Cells and the Expansion of HIT Business

机译：三洋对高效HIT太阳能电池开发和HIT业务扩展的挑战

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摘要

The world''s highest conversion efficiency levels of 21.8% (Voc: 0.718 V, Isc: 3.852 A, FF: 79.0%, confirmed by AIST) with a practical size of 100.4 cm2 has been achieved by using the HIT (hetero-junction with intrinsic thin layer) structure. This high efficiency has been mainly realized by the excellent c-Si/a-Si hetero-interface property obtained by our optimized surface cleaning process and high-quality and low-damage a-Si deposition technologies. This excellent c-Si/a-Si hetero-interface of the HIT structure results in a relatively high open circuit voltage (Voc) over 710 mV. Recently, we have succeeded in achieving an outstanding Voc of 730 mV for other efficient HIT solar cells. This result indicates the possibility of further improvement in the conversion efficiency of HIT solar cells. The higher Voc results in not only a higher conversion efficiency but also an improved temperature coefficient, which is another practical advantage for outdoor use
机译：世界上最高的转换效率水平为21.8％（AIST确认为V oc ：0.718 V，I sc ：3.852 A，FF：79.0％），通过使用HIT（具有固有薄层的异质结）结构，可以实现100.4 cm 2 的实际尺寸。这种高效率主要是通过我们优化的表面清洁工艺以及高质量和低损伤的a-Si沉积技术获得的出色的c-Si / a-Si异质界面性能来实现的。 HIT结构的这种出色的c-Si / a-Si异质界面可在710 mV以上产生相对较高的开路电压（V oc ）。最近，我们已经成功地为其他高效的HIT太阳能电池实现了730 mV的出色V oc 。该结果表明有可能进一步提高HIT太阳能电池的转换效率。更高的V oc 不仅带来更高的转换效率，而且还带来更高的温度系数，这是户外使用的另一个实用优势

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