Enhanced stability and optoelectronic properties of MAPbI3 films by a cationic surface-active agent for perovskite solar cells†,Journal of Materials Chemistry A

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Enhanced stability and optoelectronic properties of MAPbI3 films by a cationic surface-active agent for perovskite solar cells†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-05-14 00:00:00 , DOI: 10.1039/c8ta00457a
He Zhao _{1,

2,

3,

4,

5} , Shirong Wang _{1,

2,

3,

4,

5} , Mengna Sun _{1,

2,

3,

4,

5} , Fei Zhang _{1,

2,

3,

4,

5} , Xianggao Li _{1,

2,

3,

4,

5} , Yin Xiao _{1,

2,

3,

4,

5}

Affiliation

The insufficient stability of perovskite solar cells (PSCs) has considerably restrained their development and applications. Herein, we demonstrate an approach to prepare PSCs with high stability and efficiency by adding n-octyltrimethylammonium bromide (OTAB) to the precursor solution. In the resultant films, the charge trap density exhibits a significant reduction, and the long-term stability shows a remarkable enhancement. Upon adding 0.5 mg mL⁻¹ OTAB, the power conversion efficiency (PCE) of PSCs reaches 18.32% under simulated AM 1.5G solar illumination, which represents an increase of 16% compared to the pristine devices. Moreover, the OTAB-modified devices demonstrate excellent performances both in high-temperature (70 °C, 40 ± 5% relative humidity) and high-humidity (25 °C, 75 ± 5% relative humidity) environments. These results indicate a very promising approach to improve the comprehensive performance of PSCs.

中文翻译：

钙钛矿型太阳能电池用阳离子表面活性剂增强了MAPbI ₃膜的稳定性和光电性能†

钙钛矿太阳能电池（PSC）稳定性不足，极大地限制了它们的开发和应用。在这里，我们展示了一种通过向前体溶液中添加正辛基三甲基溴化铵（OTAB）来制备具有高稳定性和效率的PSC的方法。在所得的膜中，电荷陷阱密度显示出显着降低，并且长期稳定性显示出显着的提高。加入0.5 mg mL ^-1OTAB，在模拟AM 1.5G太阳光照下，PSC的功率转换效率（PCE）达到18.32％，与原始设备相比增加了16％。此外，OTAB改性器件在高温（70°C，相对湿度40±5％）和高湿度（25°C，相对湿度75±5％）环境中均表现出出色的性能。这些结果表明，提高PSC综合性能的方法非常有前途。

更新日期：2018-05-14

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