Abstract Self-designed selenium thermal-cracking system is used to produce selenium vapor with high activity for sufficient selenization of CZTSSe absorber. CZTS precursor film prepared by magnetron sputtering of CZTS quaternary target. By adjusting the heating temperature of selenium source to 600 °C, macromolecular Sen can be cracked to small molecule Sen with high reaction activity, which is helpful to form densely packed large grains in the CZTSSe absorber due to the reduction of selenium vacancies and the enhancement of surface migration. The crystallization quality of CZTSSe absorber is further improved by the optimization of selenium source heating rate. A peak performance of solar cells achieved exhibiting a power conversion efficiency of 7.9%, with Voc of 410 mV, Jsc of 35.25 mA/cm2 and FF of 54.98%. J-V characterization, electrochemical impedance spectra and capacitance-voltage tests are also employed to analysis the device performance enhancement mechanism.

中文翻译：

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通过在热裂解硒气氛中对吸收层进行后硒化来增强 Cu2ZnSn(S,Se)4 太阳能电池的性能

摘要 采用自行设计的硒热裂解系统生产高活性硒蒸气，使CZTSSe吸收剂充分硒化。CZTS四元靶材磁控溅射制备的CZTS前驱体薄膜。通过将硒源的加热温度调节到 600 ℃，大分子 Sen 可以裂解为具有高反应活性的小分子 Sen，由于硒空位的减少和增强，这有助于在 CZTSSe 吸收剂中形成密集堆积的大晶粒表面迁移。通过优化硒源加热速率，进一步提高了CZTSSe吸收剂的结晶质量。太阳能电池的峰值性能表现出 7.9% 的功率转换效率，Voc 为 410 mV，Jsc 为 35.25 mA/cm2，FF 为 54.98%。合资企业特征，