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首页> 外文会议>IEEE World Conference on Photovoltaic Energy Conversion >Over 10 Efficient Copper Zinc Tin Sulfoselenide Solar Cells from DMSO Solution Using SnCl_4 as Precursor
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Over 10 Efficient Copper Zinc Tin Sulfoselenide Solar Cells from DMSO Solution Using SnCl_4 as Precursor

机译：超过10％的铜锌锡硫代锡烯烃太阳能电池来自DMSO溶液，使用SNCL_4作为前体

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Solution processed kesterite Cu2ZnSn(S,Se)4 (CZTSSe) absorber materials have great potential as low cost photovoltaic electricity generation. Dimethyl sulfoxide (DMSO) is one of the most promising benign solvents that has achieved CZTSSe solar cell with efficiency beyond 10%. To further improve DMSO solution processed CZTSSe solar cell performance, understanding the reaction pathway from metal ion/compounds in solution to solid state film and their effects on the property and photovoltaic performance of the final absorber materials is critical. In this report, we have investigated how the precursor tin valence affects DMSO solution processed CZTSSe absorber materials property and solar cell device performance. We have fabricated CZTSSe absorber materials and solar cells by using same copper (Cu~+) and zinc (Zn~(2+)) precursors but respectively using SnCl_2 and SnCl_4 as the tin precursor. We found that Sn valence greatly affects the film morphology and composition upon thermal annealing which further determines the morphology and device performance of the selenized CZTSSe absorber materials. We found a high crystalline precursor film with CZTS and secondary SnS phase was formed from solution containing SnCl_2 precursor while a uniform and amorphous film was formed from SnCl_4 precursor solution. Both precursor films transferred to keserite CZTSSe phase after selenization, however, the film with SnCl_2 showed a non-uniform morphology with voids and impurity, resulting in solar cell with a power conversion efficiency (PCE) of only 2.29%. On the contrast, a uniform film with compact large grains was obtained from film with SnCl_4 and a power conversion efficiency (PCE) of 10.02% was achieved. A low Voc deficit of 0.596 V was observed from Sn~(4+) solution which was 0.809 V for Sn~(2+) solution. Our results indicate the use of Sn~(4+) as the precursor might be a solution to address the large Voc deficit issue of kesterite solar cells, which deserves further investigatio
机译：溶液加工酯铝酸酯CU2ZNSN（S，SE）4（CZTSSE）吸收材料具有低成本光伏发电的潜力。二甲基亚砜（DMSO）是最有前途的良性溶剂之一，该良性溶剂具有超过10％的效率的CZTSSE太阳能电池。为了进一步改善DMSO溶液加工CZTSSE太阳能电池性能，了解从溶液中金属离子/化合物的反应途径，并对最终吸收剂材料的性能和光伏性能的影响至关重要。在本报告中，我们研究了先前体锡价如何影响DMSO溶液加工CZTSSE吸收剂材料性能和太阳能电池器件性能。我们通过使用相同的铜（Cu〜+）和锌（Zn〜+））前体制造了CZTSSE吸收剂材料和太阳能电池，但分别使用SnCl_2和SnCl_4作为锡前体。我们发现SN值极大地影响了热退火时的薄膜形态和组合，这进一步决定了硒化CZTSSE吸收材料的形态和装置性能。我们发现具有CZT的高结晶前体膜，并由含有SnCl_2前体的溶液形成次级SNS相，而来自SnCl_4前体溶液形成均匀和无定形膜。两种前体膜转移到硒化后的磷灰石CZTSSE相，然而，具有SnCl_2的膜显示出与空隙和杂质的不均匀形态，导致功率转换效率（PCE）仅为2.29％的太阳能电池。相反，用SNCL_4从膜中获得具有紧凑大晶粒的均匀薄膜，实现了10.02％的功率转换效率（PCE）。从SN〜（4+）溶液中观察到0.596V的低VOC缺损，为SN〜（2+）溶液0.809V。我们的结果表明，使用Sn〜（4+），因为前体可能是解决凯斯特石太阳能电池的大型VOC缺陷问题的解决方案，这应该得到进一步的侦查

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