Temperature-modulated crystal growth and performance for highly reproducible and efficient perovskite solar cells
Temperature-modulated crystal growth and performance for highly reproducible and efficient perovskite solar cells
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高度可重复且高效的钙钛矿太阳能电池的温度调制晶体生长和性能
DOI：
10.1039/c7cp00563f
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发表时间：
2017
影响因子：
3.3
通讯作者：
Sheng Zhigao
中科院分区：
文献类型：
--
作者：
Su Tongyu;Li Xinhang;Zhang Yongzhuan;Zhang Fapei;Sheng Zhigao
研究了CH3NH3PbI3钙钛矿太阳能电池（PSCs）的退火温度（Ta）效应。利用两步法，揭示了CH3NH3PbI3薄膜的光学吸收、晶粒尺寸和结晶度与Ta的依赖关系。发现CH3NH3PbI3薄膜的晶粒尺寸随Ta的增加而单调增大。同时，当Ta超过120℃时，PbI2出现分解，其含量随着Ta的增加而迅速增加。因此，CH3NH3PbI3薄膜的光吸收和psc的效率在Ta = 120℃时同时达到最大值。通过该方法获得的psc器件性能最高和平均分别为17.61%和16.40%。这些结果证实了温度的关键作用，并为psc的性能优化提供了一条途径。
The annealing temperature (Ta) effect on CH3NH3PbI3 perovskite solar cells (PSCs) was studied. By utilizing a two-step technique, the Ta dependences of the optical absorption, grain size, and crystallinity of a CH3NH3PbI3 thin film have been revealed. It is found that the grain size of the CH3NH3PbI3 film increases monotonically with Ta. Meanwhile, the decomposed PbI2 emerges when Ta exceeds 120 °C and its content increases rapidly as Ta increases further. Consequently, the optical absorption of the CH3NH3PbI3 film and the efficiency of PSCs reach their maximum at Ta = 120 °C simultaneously. The highest and average device performances of PSCs achieved via this method are 17.61% and 16.40%, respectively. These results confirm the key role played by temperature and provide a route to the performance-optimization of PSCs.