Rational synthesis of (Cu1-xAgx)2ZnSnS4 nanocrystals with low defect and tuning band gap
Rational synthesis of (Cu1-xAgx)2ZnSnS4 nanocrystals with low defect and tuning band gap
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DOI：
10.1016/j.matlet.2016.06.037
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发表时间：
2016-10-15
影响因子：
3
通讯作者：
Wu, Si-Xin
中科院分区：
文献类型：
--
作者：
Chen, Xiao-Yan;Wang, Ji-Lei;Wu, Si-Xin
铜锌锡铅矿Cu_2ZnSnS_4已成为可扩展的商业薄膜光化学中CIGS的有前途的替代品。由于Cu和Zn原子的化学性质和尺寸相似，[Cu-Zn+Zn-Cu]缺陷团簇形成能低，在CZTS中浓度高，导致复合中心数量多。本论文合成了具有低缺陷和可调带隙的（Cu_（1-x）Ag_x）（2）ZnSnS_4纳米晶。当Ag取代Cu的2%时，观察到最高的表观载流子浓度和最低的缺陷。通过调整Agi（Cu+Ag）的比例可以合理地控制（Cu_（1-x）Ag_x）（2）ZnSnS_4纳米晶的禁带宽度。这一工作有助于提高Cu 2 ZnSnS 4基太阳能电池和光催化剂的析氢性能。皇冠版权所有（C）2016由Elsevier B. V.出版。保留所有权利。
Kesterite Cu2ZnSnS4 has emerged as promising replacement for CIGS in scalable commercial thin film photovoltaics. Due to the chemical and size similarity of Cu and Zn atom, [Cu-zn+Zn-cu] defect cluster has low formation energy and high concentration in CZTS, which resulting large amount of recombination centers. In this manuscript, (Cu1-xAgx)(2)ZnSnS4 nanocrystals were rationally synthesized with low defect and tuning band gap. When 2% of Cu was substituted by Ag, highest apparent carrier concentration and lowest defect were observed. The band gap of (Cu1-xAgx)(2)ZnSnS4 nanocrystals can be rationally controlled by adjusting Agi(Cu+Ag) ratio. This work may contribute to enhancing the performance of Cu2ZnSnS4-based solar cells and photocatalyst in hydrogen evolution. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.