# Boosting Kesterite Solar Cell Performance via Potassium Fluoride Interface Engineering
*Author: Solar PV Expert | Category: news | Published: Wed Jun 10 2026 09:15:01 GMT+0000 (Coordinated Universal Time)*

### English
* **Research Breakthrough**: Scientists at Shandong Police College have enhanced the efficiency of kesterite-structured copper–zinc–tin selenide (CZTSe) solar cells using a potassium fluoride (KF) solution treatment.
* **Key Performance Metrics**: The optimized device achieved 8.04% efficiency, outperforming the 6.59% efficiency of the untreated reference device.
* **Technical Specifications**: At the optimal 6 mmol/L concentration, the device recorded an open-circuit voltage of 0.392 V, a short-circuit current density of 34.3 mA/cm², and a fill factor of 59.7%.
* **Mechanism of Action**: The treatment effectively passivates the absorber surface, minimizes grain-boundary defects, and reduces tin (Sn) loss during high-temperature selenization, leading to a superior CdS/CZTSe interface.
* **Simulation Insights**: Using wxAMPS software, researchers confirmed that suppressing carrier recombination by reducing interface defects was the primary driver of efficiency gains.

### 中文
* **研究突破**：山东警察学院的研究团队利用氟化钾（KF）溶液处理技术，提升了铜锌锡硒（CZTSe）黄铜矿结构太阳能电池的效率。
* **关键性能指标**：经过优化的电池效率达到 8.04%，显著优于未经处理的参考电池（6.59%）。
* **技术参数**：在 6 mmol/L 的最佳浓度下，该电池的开路电压为 0.392 V，短路电流密度为 34.3 mA/cm²，填充因子为 59.7%。
* **作用机制**：该处理方法有效钝化了吸收层表面，减少了晶界缺陷，并抑制了高温硒化过程中的锡（Sn）流失，从而改善了 CdS/CZTSe 的界面质量。
* **仿真研究**：通过 wxAMPS 软件模拟，研究人员证实减少界面缺陷以抑制载流子复合是提升效率的主要驱动因素。