Issue 17, 2015

Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

Abstract

Solution-processed organometal trihalide-based perovskites have attracted attention in the field of solar energy due to their high absorption and low temperature fabrication. We demonstrated the droplet-assisted two-step process of spin coating lead iodide (PbI2) followed by spray coating methylammonium iodide (CH3NH3I) to prepare a continuous lead iodide perovskite film. A simple airbrush gun was used to control the volume of CH3NH3I, in order to attain a uniform, stoichiometric and continuous perovskite film. An insufficient or excess volume of CH3NH3I gives poor crystallinity and morphology, which gradually reduces the device performance. A power conversion efficiency (PCE) of 11.66% was achieved for 100 nm of PbI2 followed by 300 μl of CH3NH3I and annealing at 100 °C for 120 min. To address the reproducibility of the device performance, 50 devices were fabricated for statistical analysis and 80% of the devices showed the average PCE of 10–11% with reproducible JSC, VOC and FF.

Graphical abstract: Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

Supplementary files

Article information

Article type
Paper
Submitted
24 nov. 2014
Accepted
17 feb. 2015
First published
19 feb. 2015

J. Mater. Chem. A, 2015,3, 9257-9263

Preparation of metal halide perovskite solar cells through a liquid droplet assisted method

K. M. Boopathi, M. Ramesh, P. Perumal, Y. Huang, C. Tsao, Y. Chen, C. Lee and C. Chu, J. Mater. Chem. A, 2015, 3, 9257 DOI: 10.1039/C4TA06392A

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