In situ investigation of perovskite solar cells' efficiency and stability in a mimic stratospheric environment for high-altitude pseudo-satellites
In situ investigation of perovskite solar cells' efficiency and stability in a mimic stratospheric environment for high-altitude pseudo-satellites
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DOI：
10.1039/c9tc04984c
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发表时间：
2020-02-07
影响因子：
6.4
通讯作者：
Tsoi, Wing C.
中科院分区：
文献类型：
--
作者：
Barbe, Jeremy;Pockett, Adam;Tsoi, Wing C.
具有高单位重量功率的钙钛矿太阳能电池在卫星或高空伪卫星等航空航天领域具有巨大的应用潜力。后者是完全由太阳能提供动力的无人驾驶飞机，通常在平流层飞行，那里的压力、温度和照明条件与地球表面截然不同。在这项工作中，我们在模拟平流层环境下评估了高效钙钛矿太阳能电池的性能和稳定性。在受控的压力、温度和光照条件下进行了现场测量。我们表明，电池可以在-50摄氏度到+20摄氏度的大温度范围内有效地工作，在-20摄氏度时具有最大功率转换效率，这是在平流层中使用的理想选择。此外，在低至-85摄氏度的温度循环后，性能仍能保持，这代表了昼夜循环引起的温度变化。开发了一种有效的封装方法，这对于避免真空下细胞的加速降解至关重要。最后，研究人员证明了钙钛矿太阳能电池在25天的昼夜循环中具有良好的稳定性，这表明钙钛矿太阳能电池可以用于为高海拔伪卫星提供动力。
Perovskite solar cells with high power-per-weight have great potential to be used for aerospace applications such as satellites or high-altitude pseudo-satellites. The latter are unmanned aircraft exclusively powered by solar energy, typically flying in the stratosphere where the conditions of pressure, temperature and illumination are critically different from that on the earth's surface. In this work, we evaluate the performance and stability of high efficiency perovskite solar cells under a mimic stratospheric environment. In situ measurements under controlled conditions of pressure, temperature and illumination were developed. We show that the cells can operate efficiently in a large range of temperature from -50 degrees C to +20 degrees C, with a maximum power conversion efficiency at -20 degrees C, which is ideal for use in the stratosphere. Besides, performances are maintained after a number of temperature cycles down to -85 degrees C, representative of temperature variations due to diurnal cycles. An efficient encapsulation is developed, which could be critical to avoid the accelerated degradation of the cells under vacuum. Finally, a promising stability for 25 days of day-night cycles was demonstrated, which suggests that perovskite solar cells could be used to power high altitude pseudo-satellites.