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Issue 20, 2017
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Temperature-modulated crystal growth and performance for highly reproducible and efficient perovskite solar cells

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Abstract

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.

Graphical abstract: Temperature-modulated crystal growth and performance for highly reproducible and efficient perovskite solar cells

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Publication details

The article was received on 25 Jan 2017, accepted on 18 Apr 2017 and first published on 10 May 2017


Article type: Paper
DOI: 10.1039/C7CP00563F
Citation: Phys. Chem. Chem. Phys., 2017,19, 13147-13152
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    Temperature-modulated crystal growth and performance for highly reproducible and efficient perovskite solar cells

    T. Su, X. Li, Y. Zhang, F. Zhang and Z. Sheng, Phys. Chem. Chem. Phys., 2017, 19, 13147
    DOI: 10.1039/C7CP00563F

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