Enhanced Perovskite Solar Cell Efficiency Via the Electric-Field-Induced Approach.,ACS Applied Materials & Interfaces

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Enhanced Perovskite Solar Cell Efficiency Via the Electric-Field-Induced Approach.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-22 , DOI: 10.1021/acsami.0c06305
Jionghua Wu _{1,

2} , Yusheng Li ₁ , Shan Tan _{1,

2} , Bingcheng Yu _{1,

2} , Hongshi Li _{1,

2} , Yiming Li _{1,

2} , Jiangjian Shi ₁ , Huijue Wu ₁ , Yanhong Luo _{1,

2,

3} , Dongmei Li _{1,

2,

3} , Qingbo Meng _{1,

3,

4}

Affiliation

The stability issue hinders the commercialization of the perovskite solar cells (PSCs), which is widely recognized. The efficiency generally decreases over time during the working condition. Here, we report an efficiency enhancement phenomenon of PSCs in the stability test at the maximum power point, which is speculated to be related to the electric-field-induced ion migration. The defect density and efficiency-related parameters were traced in situ by admittance spectroscopy and transient photovoltage when the cell works under bias voltage. The performance enhancement was revealed to be attributed to the reduction of the cell defects owing to ion migration. An efficiency of 22.3% can be achieved after the bias voltage was kept for 8 h. These findings suggest that ion migration is a double-edged sword that affects the electrical stability of PSCs, which presents a potential approach to improve the device’s stability by appropriately controlling the defect states.

中文翻译：

通过电场诱导方法提高钙钛矿太阳能电池效率。

稳定性问题阻碍了钙钛矿太阳能电池（PSC）的商业化，这已得到广泛认可。在工作条件下，效率通常会随时间降低。在这里，我们报告了在最大功率点的稳定性测试中，PSC的效率增强现象，这被认为与电场诱导的离子迁移有关。当电池在偏置电压下工作时，通过导纳光谱和瞬态光电压原位追踪缺陷密度和效率相关参数。发现性能增强归因于由于离子迁移导致的细胞缺陷的减少。偏置电压保持8小时后，效率可达到22.3％。这些发现表明，离子迁移是一把双刃剑，会影响PSC的电稳定性，

更新日期：2020-05-22

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