Real-Time Electron Nanoscopy of Photovoltaic Absorber Formation from Kesterite Nanoparticles
Real-Time Electron Nanoscopy of Photovoltaic Absorber Formation from Kesterite Nanoparticles
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DOI：
10.1021/acsaem.9b01732
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发表时间：
2020-01-01
影响因子：
6.4
通讯作者：
Beattie, Neil S.
中科院分区：
文献类型：
--
作者：
Qu, Yongtao;Chee, See Wee;Beattie, Neil S.
Cu 2 ZnSnS 4纳米晶体在透射电子显微镜内的富Se气氛中退火。在加热阶段，一个完整的S-Se交换反应发生，而阳离子亚晶格和纳米晶体的形态被保存。在退火温度下，实时观察到具有增加的阳离子有序性的大Cu 2 ZnSnSe 4晶粒的生长。这产生了退火方案，该退火方案被转移到工业上类似的太阳能电池制造工艺中，导致器件开路电压增加33%。该方法可以应用于提高任何光伏技术的性能，需要退火，因为工艺步骤的关键性。
Cu2ZnSnS4 nanocrystals are annealed in a Se-rich atmosphere inside a transmission electron microscope. During the heating phase, a complete S-Se exchange reaction occurs while the cation sublattice and morphology of the nanocrystals are preserved. At the annealing temperature, growth of large Cu2ZnSnSe4 grains with increased cation ordering is observed in real-time. This yields an annealing protocol which is transferred to an industrially similar solar cell fabrication process resulting in a 33% increase in the device open circuit voltage. The approach can be applied to improve the performance of any photovoltaic technology that requires annealing because of the criticality of the process step.